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lt3060 series 1 3060fc for more information www.linear.com/lt3060 typical application description 45v v in , micropower, low noise, 100ma low dropout, linear regulator the lt ? 3060 series are micropower, low dropout voltage (ldo) linear regulators that operate over a 1.6v to 45v input supply range. the devices supply 100ma of output current with a typical dropout voltage of 300mv. a single external capacitor provides programmable low noise reference performance and output soft-start functional - ity. the lt3060s quiescent current is merely 40a and provides fast transient response with a minimum 2.2f output capacitor. in shutdown, quiescent current is less than 1a and the reference soft-start capacitor is reset. the lt3060 regulators optimize stability and transient response with low esr, ceramic output capacitors. the regulators do not require the addition of esr as is common with other regulators. internal protection circuitry includes reverse-battery protection, reverse-output protection, reverse-current protection, current limit with foldback and thermal shutdown. the lt3060 series are available in fixed output voltages of 1.2v , 1.5v, 1.8v, 2.5v , 3.3v, 5v and 15v, and as an adjustable voltage regulator with an output voltag e range from the 600mv reference to 44.5v. the lt3060 regulators are offered in the thermally enhanced 8-lead tsot-23 and 8-lead (2mm 2mm 0.75mm) dfn packages. l , lt, ltc, ltm, linear technology and the linear logo are registered trademarks and thinsot is a trademark of linear technology corporation. all other trademarks are the property of their respective owners. 2.5v low noise regulator features applications n input voltage range: 1.6v to 45v n output current: 100ma n quiescent current: 40a n dropout voltage: 300mv n low noise: 30v rms (10hz to 100khz) n adjustable output: v ref = 600mv n fixed output voltages: 1.2v, 1.5v, 1.8v, 2.5v, 3.3v, 5v, 15v n output tolerance: 2% over line, load and temperature n single capacitor soft-starts reference and lowers output noise n shutdown current: < 1a n reverse battery protection n current limit foldback protection n thermal limit protection n 8-lead 2mm 2mm 0.75mm dfn and 8-lead thinsot ? packages n battery-powered systems n automotive power supplies n industrial power supplies n avionic power supplies n portable instruments 3060 ta01 in shdn out adj gnd ref/byp lt3060-2.5 v in 3v to45v v out 2.5v at 100ma 30v rms noise 1f 10f c ff 10nf 10nf dropout voltage output current (ma) 0 0 dropout voltage (mv) 300250 200 150 100 50 350 10 60 70 80 90 100 20 30 40 3060 ta02 50 t j = 25c downloaded from: http:///
lt3060 series 2 3060fc for more information www.linear.com/lt3060 absolute maximum ratings in pin voltage ........................................................ 50v out pin voltage ..................................................... 50v input-to-output differential voltage (note 2) ......... 50v adj pin voltage ..................................................... 50v shdn pin voltage .................................................. 50v ref/byp pin voltage ....................................... C 0. 3v, 1v (note 1) top view ref/byp adj outout gndshdn in in dc package 8-lead (2mm 2mm) plastic dfn 9 gnd 4 1 2 3 6 5 7 8 t jmax = 125c, ja = 48c/w to 60c/w*, jc = 20c/w exposed pad (pin 9) is gnd, must be soldered to pcb shdn 1 gnd 2 gnd 3gnd 4 8 ref/byp7 adj 6 out 5 in top view ts8 package 8-lead plastic tsot-23 t jmax = 150c, ja = 57c/w to 67c/w*, jc = 25c/w * see applications information section pin configuration order information lead free finish tape and reel part marking* package description temperature range lt3060edc#pbf lt3060edc#trpbf ldtd 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc#pbf lt3060idc#trpbf ldtd 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-1.2#pbf lt3060edc-1.2#trpbf lfvt 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-1.2#pbf lt3060idc-1.2#trpbf lfvt 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-1.5#pbf lt3060edc-1.5#trpbf lfvv 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-1.5#pbf lt3060idc-1.5#trpbf lfvv 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-1.8#pbf lt3060edc-1.8#trpbf lfvw 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-1.8#pbf lt3060idc-1.8#trpbf lfvw 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-2.5#pbf lt3060edc-2.5#trpbf lfvx 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-2.5#pbf lt3060idc-2.5#trpbf lfvx 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-3.3#pbf lt3060edc-3.3#trpbf lfvy 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-3.3#pbf lt3060idc-3.3#trpbf lfvy 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-5#pbf lt3060edc-5#trpbf lfvz 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-5#pbf lt3060idc-5#trpbf lfvz 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060edc-15#pbf lt3060edc-15#trpbf lgsk 8-lead (2mm 2mm) plastic dfn C 40c to 125c lt3060idc-15#pbf lt3060idc-15#trpbf lgsk 8-lead (2mm 2mm) plastic dfn C 40c to 125c output short-circuit duration .......................... indefinite operating junction temperature (notes 3, 5, 13) e-, i-grades ....................................... C 40c to 125c mp-grade .......................................... C55c to 150c h-grade ............................................. C40c to 150c storage temperature range .................. C 65c to 150c lead temperature (ts8 soldering, 10 sec) ........... 300c downloaded from: http:///
lt3060 series 3 3060fc for more information www.linear.com/lt3060 lead free finish tape and reel part marking* package description temperature range lt3060ets8#pbf lt3060ets8#trpbf ltdtf 8-lead plastic thinsot C 40c to 125c lt3060its8#pbf lt3060its8#trpbf ltdtf 8-lead plastic thinsot C 40c to 125c lt3060mpts8#pbf lt3060mpts8#trpbf ltdtf 8-lead plastic thinsot C 55c to 150c lt3060hts8#pbf lt3060hts8#trpbf ltdtf 8-lead plastic thinsot C 40c to 150c lt3060ets8-1.2#pbf lt3060ets8-1.2#trpbf ltfwb 8-lead plastic thinsot C 40c to 125c lt3060its8-1.2#pbf lt3060its8-1.2#trpbf ltfwb 8-lead plastic thinsot C 40c to 125c lt3060mpts8-1.2#pbf lt3060mpts8-1.2#trpbf ltfwb 8-lead plastic thinsot C 55c to 150c lt3060hts8-1.2#pbf lt3060hts8-1.2#trpbf ltfwb 8-lead plastic thinsot C 40c to 150c lt3060ets8-1.5#pbf lt3060ets8-1.5#trpbf ltfwc 8-lead plastic thinsot C 40c to 125c lt3060its8-1.5#pbf lt3060its8-1.5#trpbf ltfwc 8-lead plastic thinsot C 40c to 125c lt3060mpts8-1.5#pbf lt3060mpts8-1.5#trpbf ltfwc 8-lead plastic thinsot C 55c to 150c lt3060hts8-1.5#pbf lt3060hts8-1.5#trpbf ltfwc 8-lead plastic thinsot C 40c to 150c lt3060ets8-1.8#pbf lt3060ets8-1.8#trpbf ltfwd 8-lead plastic thinsot C 40c to 125c lt3060its8-1.8#pbf lt3060its8-1.8#trpbf ltfwd 8-lead plastic thinsot C 40c to 125c lt3060mpts8-1.8#pbf lt3060mpts8-1.8#trpbf ltfwd 8-lead plastic thinsot C 55c to 150c lt3060hts8-1.8#pbf lt3060hts8-1.8#trpbf ltfwd 8-lead plastic thinsot C 40c to 150c lt3060ets8-2.5#pbf lt3060ets8-2.5#trpbf ltfwf 8-lead plastic thinsot C 40c to 125c lt3060its8-2.5#pbf lt3060its8-2.5#trpbf ltfwf 8-lead plastic thinsot C 40c to 125c lt3060mpts8-2.5#pbf lt3060mpts8-2.5#trpbf ltfwf 8-lead plastic thinsot C 55c to 150c lt3060hts8-2.5#pbf lt3060hts8-2.5#trpbf ltfwf 8-lead plastic thinsot C 40c to 150c lt3060ets8-3.3#pbf lt3060ets8-3.3#trpbf ltfwg 8-lead plastic thinsot C 40c to 125c lt3060its8-3.3#pbf lt3060its8-3.3#trpbf ltfwg 8-lead plastic thinsot C 40c to 125c lt3060mpts8-3.3#pbf lt3060mpts8-3.3#trpbf ltfwg 8-lead plastic thinsot C 55c to 150c lt3060hts8-3.3#pbf lt3060hts8-3.3#trpbf ltfwg 8-lead plastic thinsot C 40c to 150c lt3060ets8-5#pbf lt3060ets8-5#trpbf ltfwh 8-lead plastic thinsot C 40c to 125c lt3060its8-5#pbf lt3060its8-5#trpbf ltfwh 8-lead plastic thinsot C 40c to 125c lt3060mpts8-5#pbf lt3060mpts8-5#trpbf ltfwh 8-lead plastic thinsot C 55c to 150c lt3060hts8-5#pbf lt3060hts8-5#trpbf ltfwh 8-lead plastic thinsot C 40c to 150c lt3060ets8-15#pbf lt3060ets8-15#trpbf ltgsm 8-lead plastic thinsot C 40c to 125c lt3060its8-15#pbf lt3060its8-15#trpbf ltgsm 8-lead plastic thinsot C 40c to 125c lt3060mpts8-15#pbf lt3060mpts8-15#trpbf ltgsm 8-lead plastic thinsot C 55c to 150c lt3060hts8-15#pbf lt3060hts8-15#trpbf ltgsm 8-lead plastic thinsot C 40c to 150c consult ltc marketing for parts specified with wider operating temperature ranges. *the temperature grade is identified by a label on the shipping container. consult ltc marketing for information on nonstandard lead based finish parts. for more information on lead free part marking, go to: http://www.linear.com/leadfree/ for more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ order information downloaded from: http:///
lt3060 series 4 3060fc for more information www.linear.com/lt3060 electrical characteristics the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25c. (note 3) parameter conditions min typ max units minimum input voltage (notes 4, 12) i load = 100ma l 1.6 2.1 v regulated output voltage (note 5) lt3060-1.2: v in = 2.1v, i load = 1ma 2.1v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 2.1v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 1.188 1.176 1.170 1.2 1.2 1.2 1.212 1.224 1.224 v v v l t3060-1.5: v in = 2.1v, i load = 1ma 2.1v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 2.1v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 1.485 1.470 1.463 1.5 1.5 1.5 1.515 1.530 1.530 v v v l t3060-1.8: v in = 2.35v, i load = 1ma 2.35v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 2.35v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 1.782 1.764 1.755 1.8 1.8 1.8 1.818 1.836 1.836 v v v l t3060-2.5: v in = 3.05v, i load = 1ma 3.05v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 3.05v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 2.475 2.450 2.438 2.5 2.5 2.5 2.525 2.550 2.550 v v v l t3060-3.3: v in = 3.85v, i load = 1ma 3.85v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 3.85v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 3.267 3.234 3.218 3.3 3.3 3.3 3.333 3.366 3.366 v v v l t3060-5: v in = 5.55v, i load = 1ma 5.55v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 5.55v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 4.950 4.900 4.875 5 5 5 5.050 5.100 5.100 v v v l t3060-15: v in = 15.55v, i load = 1ma 15.55v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 15.55v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 14.85 14.70 14.63 15 15 15 15.15 15.30 15.30 v v v adj pin v oltage (notes 4, 5) lt3060: v in = 2.1v, i load = 1ma 2.1v < v in < 45v, 1ma < i load < 100ma (e-, i-grades) 2.1v < v in < 45v, 1ma < i load < 100ma (mp-, h-grades) l l 594 588 585 600 600 600 606 612 612 mv mv mv line regulation lt3060-1.2: v in = 2.1v to 45v, i load = 1ma (e-, i-grades) v in = 2.1v to 45v, i load = 1ma (mp-, h-grades) l l 0.9 3.5 7 mv lt3060-1.5: v in = 2.1v to 45v, i load = 1ma (e-, i-grades) v in = 2.1v to 45v, i load = 1ma (mp-, h-grades) l l 1 4.2 8 mv lt3060-1.8: v in = 2.35v to 45v, i load = 1ma (e-, i-grades) v in = 2.35v to 45v, i load = 1ma (mp-, h-grades) l l 1.1 4.5 12 mv lt3060-2.5: v in = 3.05v to 45v, i load = 1ma (e-, i-grades) v in = 3.05v to 45v, i load = 1ma (mp-, h-grades) l l 1.2 5.4 15 mv lt3060-3.3: v in = 3.85v to 45v, i load = 1ma (e-, i-grades) v in = 3.85v to 45v, i load = 1ma (mp-, h-grades) l l 1.3 7 19 mv lt3060-5: v in = 5.55v to 45v, i load = 1ma (e-, i-grades) v in = 5.55v to 45v, i load = 1ma (mp-, h-grades) l l 1.5 8.5 25 mv lt3060-15: v in = 15.55v to 45v, i load = 1ma (e-, i-grades) v in = 15.55v to 45v, i load = 1ma (mp-, h-grades) l l 2.2 22 55 mv lt3060: v in = 2.1v to 45v, i load = 1ma (e-, i-grades) (note 4) v in = 2.1v to 45v, i load = 1ma (mp-, h-grades) l l 0.6 3.5 4 mv downloaded from: http:///
lt3060 series 5 3060fc for more information www.linear.com/lt3060 electrical characteristics the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25c. (note 3) parameter conditions min typ max units load regulation (note 15) lt3060-1.2: v in = 2.1v, i load = 1ma to 100ma (e-, i-grades) v in = 2.1v, i load = 1ma to 100ma (mp-, h-grades) l l 2.4 10 18 mv mv lt3060-1.5: v in = 2.1v, i load = 1ma to 100ma (e-, i-grades) v in = 2.1v, i load = 1ma to 100ma (mp-, h-grades) l l 2.5 12 22 mv mv lt3060-1.8: v in = 2.35v, i load = 1ma to 100ma (e-, i-grades) v in = 2.35v, i load = 1ma to 100ma (mp-, h-grades) l l 2.6 14 27 mv mv lt3060-2.5: v in = 3.05v, i load = 1ma to 100ma (e-, i-grades) v in = 3.05v, i load = 1ma to 100ma (mp-, h-grades) l l 2.8 19 37 mv mv lt3060-3.3: v in = 3.85v, i load = 1ma to 100ma (e-, i-grades) v in = 3.85v, i load = 1ma to 100ma (mp-, h-grades) l l 3.1 24 49 mv mv lt3060-5: v in = 5.55v, i load = 1ma to 100ma (e-, i-grades) v in = 5.55v, i load = 1ma to 100ma (mp-, h-grades) l l 3.7 35 75 mv mv lt3060-15: v in = 15.55v, i load = 1ma to 100ma (e-, i-grades) v in = 15.55v, i load = 1ma to 100ma (mp-, h-grades) l l 7 100 225 mv mv lt3060: v in = 2.1v, i load = 1ma to 100ma (e-, i-grades) (note 4) v in = 2.1v, i load = 1ma to 100ma (mp-, h-grades) l l 0.2 4 9 mv mv dropout voltage v in = v out(nominal) (notes 6, 7) i load = 1ma i load = 1ma l 75 110 180 mv mv i load = 10ma i load = 10ma l 150 200 300 mv mv i load = 50ma (note 14) i load = 50ma (note 14) l 240 280 410 mv mv i load = 100ma (note 14) i load = 100ma (note 14) l 300 350 510 mv mv gnd pin current v in = v out(nominal) + 0.55v (notes 6, 8) i load = 0a i load = 1ma i load = 10ma i load = 50ma i load = 100ma l l l l l 40 60 160 0.8 2 80 100 350 1.8 4 a a a ma ma quiescent current in shutdown v in = 45v, v shdn = 0v 0.3 1 a adj pin bias current (note 9) v in = 2.1v l 15 60 na output voltage noise c out = 10f, i load = 100ma, c byp = 0.01f v out = 600mv, bw = 10hz to 100khz 30 v rms shutdown threshold v out = off to on v out = on to off l l 0.3 0.8 0.7 1.5 v v shdn pin current (note 10) v shdn = 0v v shdn = 45v l l 0.9 1 3 a a ripple rejection v ripple = 0.5v p-p , f ripple = 120hz, i load = 100ma lt3060-1.2: v in = 2.7v (avg) 64 79 db lt3060-1.5: v in = 3v (avg) 62 77 db lt3060-1.8: v in = 3.3v (avg) 60 75 db lt3060-2.5: v in = 4v (avg) 58 73 db lt3060-3.3: v in = 4.8v (avg) 55 70 db lt3060-5: v in = 6.5v (avg) 52 67 db lt3060-15: v in = 16.5v (avg) 45 60 db lt3060: v in = 2.1v (avg) (note 4) 70 85 db current limit v in = 7v, v out = 0 v in = v out(nominal) + 1v (notes 6, 12), v out = C5% l 110 200 ma ma downloaded from: http:///
lt3060 series 6 3060fc for more information www.linear.com/lt3060 note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. note 2: absolute maximum input-to-output differential voltage is not achievable with all combinations of rated in pin and out pin voltages. with the in pin at 50v, the out pin may not be pulled below 0v. the total measured voltage from in to out must not exceed 50v. if out is above ground, do not actively pull out above in by more than 40v. note 3: the lt3060 regulators are tested and specified under pulse load conditions such that t j ? t a . the lt3060e regulators are 100% tested at t a = 25c. performance at C40c to 125c is assured by design, characterization and correlation with statistical process controls. the lt3060i regulators are guaranteed over the full C40c to 125c operating junction temperature range. the lt3060mp regulators are 100% tested over the C55c to 150c operating junction temperature range. the lt3060h regulators are 100% tested at the 150c operating junction temperature. high junction temperatures degrade operating lifetimes. operating lifetime is derated at junction temperatures greater than 125c. note 4: the lt3060 adjustable version is tested and specified for these conditions with the adj connected to the out pin.note 5: maximum junction temperature limits operating conditions. the regulated output voltage specification does not apply for all possible combinations of input voltage and output current. limit the output current range if operating at the maximum input-to-output voltage differential. limit the input-to-output voltage differential if operating at maximum output current. current limit foldback will limit the maximum output current as a function of input-to-output voltage. see current limit vs v in C v out in the typical performance characteristics section. note 6: to satisfy minimum input voltage requirements, the lt3060 adjustable version is tested and specified for these conditions with an external resistor divider (bottom 115k, top 365k) for an output voltage of 2.5v. the external resistor divider adds 5a of dc load on the output. this external current is not factored into gnd pin current. note 7: dropout voltage is the minimum input-to-output voltage differential needed to maintain regulation at a specified output current. in dropout, the output voltage equals: (v in C v dropout ). for the lt3060, lt3060-1.2, lt3060-1.5 and lt3060-1.8, dropout is limited by the minimum input specification under some output voltages and load conditions. see the minimum input voltage curve in the typical performance characteristics section. note 8: gnd pin current is tested with v in = v out(nominal) + 0.55v and a current source load. gnd pin current will increase in dropout. see gnd pin current curves in the typical performance characteristics section. note 9: adj pin bias current flows out of the adj pin. note 10: shdn pin current flows into the shdn pin. note 11: reverse output current is tested with the in pin grounded and the out pin forced to the rated output voltage. this current flows into the out pin and out of the gnd pin. note 12: to satisfy requirements for minimum input voltage, current limit is tested at v in = v out(nominal) + 1v or v in = 2.1v, whichever is greater. note 13: this ic includes overtemperature protection that protects the device during momentary overload conditions. junction temperature will exceed 125c (lt3060e, lt3060i) or 150c (lt3060mp, lt3060h) when overtemperature circuitry is active. continuous operation above the specified maximum junction temperature may impair device reliability. note 14: the dropout voltage specification is guaranteed for the dfn package. the dropout voltage specification for high output currents cannot be guaranteed for the ts8 package due to production test limitations. note 15: the load regulation specification is guaranteed for the fixed voltage options in the dfn package. the load regulation specification cannot be guaranteed for the fixed voltage options in the ts8 package due to production test limitations. the ts8 packages are tested similarly to the lt3060 adjustable version with the adj connected to the out pin. the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25c. (note 3) electrical characteristics parameter conditions min typ max units input reverse leakage current v in = C45v, v out = 0 l 300 a reverse output current (note 11) lt3060-1.2: v out = 1.2v, v in = 0v 5 10 a lt3060-1.5: v out = 1.5v, v in = 0v 5 10 a lt3060-1.8: v out = 1.8v, v in = 0v 5 10 a lt3060-2.5: v out = 2.5v, v in = 0v 5 10 a lt3060-3.3: v out = 3.3v, v in = 0v 5 10 a lt3060-5: v out = 5v, v in = 0v 5 10 a lt3060-15: v out = 15v, v in = 0v 5 10 a lt3060: v out = 1.2v, v in = 0v 0.2 10 a downloaded from: http:///
lt3060 series 7 3060fc for more information www.linear.com/lt3060 output current (ma) 0 0 dropout voltage (mv) 450350 400300 250 200 150 100 50 550 500 10 60 70 80 90 100 20 30 40 3060 g01 50 t j = 25c t j = 125c output current (ma) 0 0 guaranteed dropout voltage (mv) 450400 350 300 250 200 150 100 50 550500 10 60 70 80 90 100 20 30 40 3060 g02 50 t j 150c t j 25c = test points temperature (c) C75 0 dropout voltage (mv) 450 500400 350 300 250 200 150 100 50 550 C50 75 100 125 150 175 C25 0 25 3060 g03 50 i l = 100ma i l = 50ma i l = 10ma i l = 1ma typical dropout voltage guaranteed dropout voltage dropout voltage typical performance characteristics temperature (c) C75 0 quiescent current (a) 50 60 7040 30 20 10 80 C50 75 100 125 150 175 C25 0 25 3060 g04 50 v in = 6v, v shdn = v in r l = (120k for lt3060) i l = 0 (5a for lt3060) lt3060 v shdn = 0v lt3060-1.2/-1.5/-1.8/-2.5/-3.3/-5 quiescent current lt3060-1.2 output voltage lt3060-1.5 output voltage lt3060-1.8 output voltage lt3060-2.5 output voltage lt3060-3.3 output voltage t a = 25c, unless otherwise noted. temperature (c) C75 1.176 output voltage (v) 1.200 1.204 1.208 1.212 1.216 1.2201.196 1.192 1.188 1.184 1.180 1.224 C50 75 100 125 150 175 C25 0 25 3060 g05 50 i l = 1ma temperature (c) C75 1.470 output voltage (v) 1.500 1.505 1.510 1.515 1.520 1.5251.495 1.490 1.485 1.480 1.475 1.530 C50 75 100 125 150 175 C25 0 25 3060 g06 50 i l = 1ma temperature (c) C75 1.764 output voltage (v) 1.800 1.806 1.812 1.818 1.824 1.8301.794 1.788 1.782 1.776 1.770 1.836 C50 75 100 125 150 175 C25 0 25 3060 g07 50 i l = 1ma temperature (c) C75 2.45 output voltage (v) 2.49 2.50 2.51 2.52 2.53 2.542.48 2.47 2.46 2.55 C50 75 100 125 150 175 C25 0 25 3060 g08 50 i l = 1ma temperature (c) C75 3.234 output voltage (v) 3.300 3.311 3.322 3.333 3.344 3.3553.289 3.278 3.267 3.256 3.245 3.366 C50 75 100 125 150 175 C25 0 25 3060 g09 50 i l = 1ma downloaded from: http:///
lt3060 series 8 3060fc for more information www.linear.com/lt3060 typical performance characteristics t a = 25c, unless otherwise noted. temperature (c) C75 0.588 adj pin voltage (v) 0.600 0.602 0.604 0.606 0.608 0.6100.598 0.596 0.594 0.592 0.590 0.612 C50 75 100 125 150 175 C25 0 25 3060 g11 50 i l = 1ma v in = 2.1v lt3060 adj pin voltage 0 1 2 7 8 9 10 3 4 5 6 input voltage (v) 0 quiescent current (a) 100 125 150 175 7550 25 200 3060 g15 t j = 25c r l = v out = 2.5v v shdn = 0v v shdn = v in lt3060-2.5 quiescent current lt3060-5 output voltage lt3060-15 output voltage temperature (c) C75 4.90 output voltage (v) 4.98 5.00 5.02 5.04 5.06 5.084.96 4.94 4.92 5.10 C50 75 100 125 150 175 C25 0 25 3060 g10 50 i l = 1ma lt3060-1.2 quiescent current input voltage (v) 0 1 0 quiescent current (a) 100 125 150 175 7550 25 200 2 7 8 9 10 3 4 5 3060 g12 6 t j = 25c r l = v out = 1.2v v shdn = 0v v shdn = v in lt3060-1.5 quiescent current 0 1 2 7 8 9 10 3 4 5 6 input voltage (v) 0 quiescent current (a) 100 125 150 175 7550 25 200 3060 g13 t j = 25c r l = v out = 1.5v v shdn = 0v v shdn = v in lt3060-1.8 quiescent current 0 1 2 7 8 9 10 3 4 5 6 input voltage (v) 0 quiescent current (a) 100 125 150 175 7550 25 200 3060 g14 t j = 25c r l = v out = 1.8v v shdn = 0v v shdn = v in lt3060-3.3 quiescent current 0 1 2 7 8 9 10 3 4 5 6 input voltage (v) 0 quiescent current (a) 100 125 150 175 7550 25 200 3060 g16 t j = 25c r l = v out = 3.3v v shdn = 0v v shdn = v in lt3060-5 quiescent current 0 1 2 7 8 9 10 3 4 5 6 input voltage (v) 0 quiescent current (a) 100 125 150 175 7550 25 200 3060 g17 t j = 25c r l = v out = 5v v shdn = 0v v shdn = v in temperature (c) C75 14.70 output voltage (v) 15.00 15.05 15.10 15.15 15.20 15.2514.95 14.90 14.80 14.8514.75 15.30 C50 75 100 125 150 175 C25 0 25 3060 g10a 50 i l = 1ma downloaded from: http:///
lt3060 series 9 3060fc for more information www.linear.com/lt3060 input voltage (v) 0 0 quiescent current (a) 7060 50 40 30 20 10 80 5 30 35 40 45 10 15 20 3060 g18 25 t j = 25c r l = 120k v out = 0.6v v shdn = v in v shdn = 0 lt3060 quiescent current lt3060-15 quiescent current input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 1 6 7 8 9 10 2 3 4 3060 g22 5 t j = 25c *for v out = 2.5v v shdn = v in r l = 25 i l = 100ma* r l = 50 i l = 50ma* r l = 250 i l = 10ma* r l = 2.5k i l = 1ma* lt3060-2.5 gnd pin current typical performance characteristics t a = 25c, unless otherwise noted. lt3060-1.2 gnd pin current input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 1 6 7 8 9 10 2 3 4 3060 g19 5 t j = 25c *for v out = 1.2v v shdn = v in r l = 12 i l = 100ma* r l = 24 i l = 50ma* r l = 120 i l = 10ma* r l = 1.2k i l = 1ma* lt3060-1.5 gnd pin current input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 1 6 7 8 9 10 2 3 4 3060 g20 5 t j = 25c *for v out = 1.5v v shdn = v in r l = 15 i l = 100ma* r l = 30 i l = 50ma* r l = 150 i l = 10ma* r l = 1.5k i l = 1ma* lt3060-1.8 gnd pin current input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 1 6 7 8 9 10 2 3 4 3060 g21 5 t j = 25c *for v out = 1.8v v shdn = v in r l = 18 i l = 100ma* r l = 36 i l = 50ma* r l = 180 i l = 10ma* r l = 1.8k i l = 1ma* lt3060-3.3 gnd pin current input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 1 6 7 8 9 10 2 3 4 3060 g23 5 t j = 25c *for v out = 3.3v v shdn = v in r l = 33 i l = 100ma* r l = 66 i l = 50ma* r l = 330 i l = 10ma* r l = 3.3k i l = 1ma* lt3060-5 gnd pin current lt3060-15 gnd pin current 0 5 10 35 40 45 15 20 25 30 input voltage (v) 0 quiescent current (a) 100 125 150 175 7550 25 200 3060 g17a t j = 25c r l = v out = 15v v shdn = 0v v shdn = v in input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 6 7 8 9 10 2 1 3 4 3060 g24 5 t j = 25c *for v out = 5v v shdn = v in r l = 50 i l = 100ma* r l = 100 i l = 50ma* r l = 500 i l = 10ma* r l = 5k i l = 1ma* 0 5 10 35 40 45 15 20 25 30 input voltage (v) 0 quiescent current (ma) 1.501.25 1.75 2.00 2.251.00 0.75 0.50 0.25 2.50 3060 g24a t j = 25c *for v out = 15v v shdn = v in r l = 150 i l = 100ma* r l = 300 i l = 50ma* r l = 1.5k i l = 10ma* r l = 15k i l = 1ma* downloaded from: http:///
lt3060 series 10 3060fc for more information www.linear.com/lt3060 shdn pin input current temperature (c) C75 0 shdn pin input current (a) 1.4 1.6 1.81.2 1.0 0.8 0.4 0.60.2 2.0 C50 75 100 125 150 175 C25 0 25 3060 g29 50 v shdn = 45v adj pin bias current temperature (c) C75 C50 adj pin bias current (na) 20 30 4010 0 C10C30 C20C40 50 C50 75 100 125 150 175 C25 0 25 3060 g30 50 current limit vs v in Cv out input/output differential (v) 0 0 current limit (ma) 225150 175 200125 100 50 7525 250 5 30 35 40 45 10 15 20 3060 g31 25 ? v out = C 5% t j = 25c t j = 125c t j = C50c current limit vs temperature temperature (c) C75 0 current limit (ma) 175 200 225150 125 100 50 7525 250 C50 75 100 125 150 175 C25 0 25 3060 g32 50 v in = 7v v out = 0v lt3060 reverse output current output voltage (v) 0 0 reverse output current (ma) 1.4 1.6 1.81.2 1.0 0.8 0.4 0.60.2 2.0 5 30 35 40 45 10 15 20 3060 g33 25 adj out t j = 25c v in = 0v current flowsinto out pin v out = v adj typical performance characteristics shdn pin threshold temperature (c) C75 0 shdn pin threshold (v) 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.40.6 0.5 0.4 0.2 0.30.1 1.5 C50 75 100 125 150 175 C25 0 25 3060 g27 50 on to off off to on shdn pin input current shdn pin voltage (v) 0 0 shdn pin input current (a) 1.4 1.6 1.81.2 1.0 0.8 0.4 0.60.2 2.0 5 30 35 40 45 10 15 20 3060 g28 25 t a = 25c, unless otherwise noted. gnd pin current vs i load output current (ma) 0 0 gnd pin current (ma) 3.53.0 2.5 2.0 1.0 1.50.5 4.0 10 60 70 80 90 100 20 30 40 3060 g26 50 v in = v out(nominal) + 1v input voltage (v) 0 0 gnd pin current (ma) 2.252.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2.50 1 6 7 8 9 10 2 3 4 3060 g25 5 t j = 25c *for v out = 0.6v v shdn = v in r l = 6 i l = 100ma* r l = 12 i l = 50ma* r l = 60 i l = 10ma* r l = 600 i l = 1ma* lt3060 gnd pin current downloaded from: http:///
lt3060 series 11 3060fc for more information www.linear.com/lt3060 reverse output current temperature (c) C75 0 reverse output current (a) 35 40 4530 25 20 10 15 5 50 C50 75 100 125 150 175 C25 0 25 3060 g35 50 v in = 0v, v out = v adj = 1.2v (lt3060) v out = 1.2v (lt3060-1.2) v out = 1.5v (lt3060-1.5) v out = 1.8v (lt3060-1.8) v out = 2.5v (lt3060-2.5) v out = 3.3v (lt3060-3.3) v out = 5v (lt3060-5) v out = 15v (lt3060-15) out (lt3060) adj (lt3060) out (lt3060-1.2/-1.5/ -1.8/2.5/-3.3/-5/-15) lt3060-1.2/-1.5/-1.8/-2.5/-3.3/-5 /-15 reverse output current output voltage (v) 0 0 reverse output current (a) 250150 200100 50 350300 5 30 35 40 45 10 15 20 3060 g34 25 lt3060-1.2 lt3060-5 lt3060-15 lt3060-1.5 lt3060-1.8 lt3060-2.5 lt3060-3.3 t j = 25c v in = 0v typical performance characteristics input ripple rejection i l = 100ma c ref/byp = c ff = 0 v in = v out(nominal) + 1.5v + 50mv rms ripple frequency (hz) 10 0 ripple rejection (db) 60 70 80 9050 40 30 20 10 100 100 10m 1k 10k 100k 3060 g36 1m v out = 0.6v c out = 10f c out = 2.2f v out = 5v lt3060-5 input ripple rejection lt3060-15 input ripple rejection frequency (hz) 10 0 ripple rejection (db) 60 70 80 9050 40 30 20 10 100 100 10m 1k 10k 100k 3060 g37 1m i l = 100ma v out = 5v c out = 10f v in = 6v + 50mv rms ripple c ref/byp = c ff = 10nf c ref/byp = 10nf, c ff = 0 c ref/byp = c ff = 0 ripple rejection vs temperature temperature (c) C75 0 ripple rejection (db) 9080 70 60 40 5030 20 10 100 C50 75 100 125 150 175 C25 0 25 3060 g38 50 c ref/byp = 10nf c ref/byp = 0 i l = 100ma v out = 0.6v v in = 2.6v + 0.5v p-p ripple at f = 120hz minimum input voltage temperature (c) C75 0 minimum input voltage (v) 1.4 1.6 1.8 2.01.2 1.0 0.8 0.4 0.60.2 2.2 C50 75 100 125 150 175 C25 0 25 3060 g39 50 i l = 50ma i l = 100ma v shdn = v in load regulation load regulation temperature (c) C75 load regulation (mv) 5 0 C5 C10C20 C15C25 C50 75 100 125 150 175 C25 0 25 3060 g40 50 v in = v out(nominal) + 0.55v (lt3060-1.8/-2.5/-3.3/-5) v in = 2.1v (lt3060/-1.2/-1.5) ? i l = 1ma to 100ma lt3060-5 lt3060-3.3 lt3060-2.5 lt3060-1.8 lt3060-1.5 lt3060-1.2 lt3060 t a = 25c, unless otherwise noted. frequency (hz) 10 0 ripple rejection (db) 60 70 80 9050 40 30 20 10 100 100 10m 1k 10k 100k 3060 g37a 1m i l = 100ma v out = 15v c out = 10f v in = 16v + 50mv rms ripple c ref/byp = c ff = 10nf c ref/byp = 10nf, c ff = 0 c ref/byp = c ff = 0 temperature (c) C75 load regulation (mv) 0 C5 C10C15 C25 C30 C35 C40 C45 C20C50 C50 75 100 125 150 175 C25 0 25 3060 g40a 50 v in = v out(nominal) + 0.55v ?i l = 1ma to 100ma lt3060-2.5 lt3060-5 lt3060-15 downloaded from: http:///
lt3060 series 12 3060fc for more information www.linear.com/lt3060 rms output noise vs load current vs c ref/byp , c ff = 0 load current (ma) 0.01 0 output noise voltage (v rms ) 4030 20 10 110 100 9080 70 60 50 10 1 100 3060 g44 0.1 v out = 0.6v c out = 10f c ref/byp = 0 c ref/byp = 10pf c ref/byp = 100pf c ref/byp = 1nf c ref/byp = 10nf c ref/byp = 100nf typical performance characteristics rms output noise vs feedforward capacitor (c ff ) rms output noise vs feedforward capacitor (c ff ) rms output noise vs load current c ref/byp = 10nf, c ff = 0 rms output noise vs load current c ref/byp = 10nf, c ff = 0 load current (ma) 0.01 0 output noise voltage (v rms ) 5040 30 20 10 170120 130 140 150 160110 100 9080 70 60 10 1 100 3060 g45 0.1 v out = 5v v out = 3.3v v out = 1.2v v out = 2.5v v out = 1.8v v out = 1.5v v out = 0.6v f = 10hz to 100khz c out = 10f i fb-divider = 5a feedforward capacitor, c ff (f) 10p 0 output noise voltage (v rms ) 10 120 70 80 90 100 110 6050 40 30 20 1n 10n 3060 g46 100p f = 10hz to 100khzc ref/byp = 10nf c out = 10f i fb-divider = 5a i l = 100ma v out = 0.6v v out = 5v v out = 1.8v v out = 1.5v v out = 1.2v v out = 2.5v v out = 3.3v t a = 25c, unless otherwise noted. output noise spectral density c ref/byp = 0, c ff = 0 v out = 1.8v v out = 1.5v v out = 1.2v v out = 0.6v v out = 15v v out = 5v v out = 3.3v v out = 2.5v frequency (hz) 10 0.01 output noise spectral density (v / hz ) 10 1 0.1 100 10k 100k 100 3060 g41 1k c out = 10f i l = 100ma output noise spectral density vs c ref/byp , c ff = 0 frequency (hz) 10 0.01 output noise spectral density (v / hz ) 1 0.1 10 10k 1k 100k 3060 g42 100 v out = 5v c ref/byp = 10nf c ref/byp = 1nf v out = 0.6v c out = 10f i l = 100ma c ref/byp = 100pf output noise spectral density vs c ff , c ref/byp = 10nf frequency (hz) 10 0.01 output noise spectral density (v / hz ) 1 0.1 10 10k 1k 100k 3060 g43 100 c ff = 0 c ff = 100pf c ff = 10nf v out = 5v c out = 10f i l = 100ma c ff = 1nf load current (ma) 0.01 0 output noise voltage (v rms ) 125100 7550 25 350250 275 300 325225 200 175 150 10 1 100 3060 g45a 0.1 v out = 15v v out = 5v v out = 2.5v v out = 0.6v f = 10hz to 100khz c out = 10f i fb-divider = 5a feedforward capacitor, c ff (f) 10p 0 output noise voltage (v rms ) 25 250150 175 200 225125 100 7550 1n 10n 3060 g46a 100p f = 10hz to 100khzc ref/byp = 10nf c out = 10f i fb-divider = 5a i l = 100ma v out = 0.6v v out = 15v v out = 5v v out = 2.5v downloaded from: http:///
lt3060 series 13 3060fc for more information www.linear.com/lt3060 lt3060-5 10hz to 100khz output noise, c ref/byp = 10nf, c ff = 10nf lt3060-5 transient response, c ff = 0 lt3060-5 transient response, c ff = 10nf 1ms/div c out = 10f i l = 100ma v out = 5v v out 100v/div 3060 g48 100s/div v in = 6v c out = c in = 10f i fb-divider = 5a v out 50mv/div i out 50ma/div 3060 g49 ?i out = 10ma to 100ma v out = 5v 20s/div v in = 6v c out = c in = 10f i fb-divider = 5a v out 20mv/div i out 50ma/div 3060 g50 ?i out = 10ma to 100ma v out = 5v lt3060-5 10hz to 100khz output noise, c ref/byp = 10nf, c ff = 0 1ms/div c out = 10f i l = 100ma v out = 5v v out 100v/div 3060 g47 typical performance characteristics lt3060-5 transient response load dump shdn transient response c ref/byp = 0 shdn transient response c ref/byp = 10nf 2ms/div c out = c in = 2.2f c ref/byp = c ff = 10nf i fb-divider = 5a v out 10mv/div v in 10v/div 3060 g51 v in = 12v to 45v v out = 5v 4ms/div v out 2v/div r l = 50 ref/byp 500mv/div shdn 1v/div 3060 g52 c out = c in = 2.2f c ff = 0 4ms/div v out 2v/div r l = 50 ref/byp 500mv/div shdn 1v/div 3060 g53 c out = c in = 2.2f c ff = 0 t a = 25c, unless otherwise noted. downloaded from: http:///
lt3060 series 14 3060fc for more information www.linear.com/lt3060 start-up time vs ref/byp capacitor ref/byp capacitor (f) 10p 0.01 start-up time (ms) 10 1 0.1 100 10n 100n 100p 3060 g54 1n c ff = 0 start-up time vs c ff lt3060-5 lt3060-15 feedforward capacitor, c ff (f) 10p start-up time (ms) 10n 1n 100n 3060 g55 100p c ref/byp = 0 i fb-divider = 5a 0.01 1 10 1000 100 0.1 lt3060-3.3 lt3060-1.2 lt3060-1.5 lt3060-1.8 lt3060-2.5 typical performance characteristics t a = 25c, unless otherwise noted. downloaded from: http:///
lt3060 series 15 3060fc for more information www.linear.com/lt3060 pin functions ref/byp (pin 1/pin 8): reference/bypass. connecting a single capacitor from this pin to gnd bypasses the lt3060s reference noise and soft-starts the reference. a 10nf bypass capacitor typically reduces output voltage noise to 30v rms in a 10hz to 100khz bandwidth. soft- start time is directly proportional to the ref/byp capacitor value. if the lt3060 is placed in shutdown, ref/byp is actively pulled low by an internal device to reset soft-start. if low noise or soft-start performance is not required, this pin must be left floating (unconnected). do not drive this pin with any active circuitry. adj (pin 2/pin 7): adjust. this pin is the error ampli - fiers inverting terminal. its typical bias current of 15na flows out of the pin (see cur ve of adj pin bias current vs temperature in the typical performance characteristics section). the adj pin voltage is 600mv referenced to gnd.connecting a capacitor from adj to out reduces output noise and improves transient response for output voltages greater than 600mv. see the applications information sec - tion for calculating the value of the feedforward capacitor. for fixed voltage versions of the lt3060, if low noise and fast transient response is not required, this pin must be left floating (unconnected). out (pins 3, 4/pin 6): output. these pin(s) supply power to the load. stability requirements demand a minimum 2.2f ceramic output capacitor to prevent oscillations. large load transient applications require larger output capaci - tors to limit peak voltage transients. see the applications information section for details on transient response and reverse output characteristics. permissible output voltage range is 600mv to 44.5v. in (pins 5, 6/pin 5): input. these pin(s) supply power to the device. the lt3060 requires a local in bypass capacitor if it is located more than six inches from the main input filter capacitor. in general, battery output impedance rises with frequency, so adding a bypass capacitor in battery- powered circuits is advisable. an input bypass capacitor in the range of 1f to 10f suffices. the lt3060 withstands reverse voltages on the in pin with respect to its gnd and out pins. in a reversed input situation, such as a battery plugged in backwards, the lt3060 behaves as if a large resistor is in series with its input. limited reverse current flows into the lt3060 and no reverse voltage appears at the load. the device protects itself and the load. shdn (pin 7/pin 1): shutdown. pulling the shdn pin low puts the lt3060 into a low power state and turns the output off. drive the shdn pin with either logic or an open collector/drain with a pull-up resistor. the resistor supplies the pull-up current to the open collector/drain logic, normally several microamperes, and the shdn pin current, typically less than 3a. if unused, connect the shdn pin to in. the lt3060 does not function if the shdn pin is not connected. the shdn pin cannot be driven below gnd unless tied to the in pin. if the shdn pin is driven below gnd while in is powered, the output may turn on. shdn pin logic cannot be referenced to a negative supply voltage.gnd (pin 8, exposed pad pin 9/pins 2, 3, 4): ground. for the adjustable lt3060, connect the bottom of the ex - ternal resistor divider that sets the output voltage directly to gnd for optimum regulation. for the dfn package, tie exposed pad pin 9 directly to pin 8 and the pcb ground. this exposed pad provides enhanced thermal per formance with its connection to the pcb ground. see the applica - tions information section for thermal considerations and calculating junction temperature. (dc8/ts8) downloaded from: http:///
lt3060 series 16 3060fc for more information www.linear.com/lt3060 the lt3060 series are micropower, low noise, low drop - out voltage, 100ma linear regulators with shutdown. the devices supply up to 100ma at a typical dropout voltage of 300mv and operate over a 1.6v to 45v input range. a single external capacitor provides programmable low noise reference performance and output soft-start func - tionality. for example, connecting a 10nf capacitor from the ref/byp pin to gnd lowers output noise to 30 v rms over a 10hz to 100khz bandwidth. this capacitor also soft-starts the reference and prevents output voltage overshoot at turn-on. the lt3060 s quiescent current is merely 40a for the adjustable version and 45a for the fixed voltage versions, while providing fast transient response with a minimum low esr 2.2f ceramic output capacitor. in shutdown, quiescent current is less than 1a and the reference soft- start capacitor is reset. the lt3060 regulators optimize stability and transient response with low esr, ceramic output capacitors. the regulators do not require the addition of esr as is com - mon with other regulators. the lt3060 adjustable version typically provides 0.1% line regulation and 0.03% load regulation. for fixed voltage versions, load regulation is slightly increased due to 20m of typical resistance in series with the output. curves of load regulation appear in the typical performance characteristics section. internal protection cir cuitry includes reverse-battery pro - tection, reverse-output protection, reverse-current protec - tion, current limit with foldback and thermal shutdown.this bullet-proof protection set makes it ideal for use in batter y-powered systems. in battery backup applications where the output is held up by a backup battery and the input is pulled to ground, the l t3060 acts like it has a di - ode in series with its output and prevents reverse current flow . additionally, in dual supply applications where the regulator load is returned to a negative supply, the output can be pulled below ground by as much as 45v and the device still starts normally and operates. applications information 3060 f01 in shdn out adj gnd ref/byp lt3060 v in v out r2r1 figure 1. adjustable operation v out = 0.6v 1 + r2 r1 ?? ? ?? ? C i adj ? r2 ( ) v adj = 0.6v i adj = 15na at 25o c output range = 0.6v to 44.5v adjustable operation the lt3060 adjustable version has an output voltage range of 0.6v to 44.5v. the output voltage is set by the ratio of two external resistors, as shown in figure 1. the device servos the output to maintain the adj pin voltage at 0.6v referenced to ground. the current in r1 is then equal to 0.6v/r1, and the current in r2 is the current in r1 minus the adj pin bias current. the adj pin bias current, 15na at 25c, flows from the adj pin through r1 to gnd. calculate the output voltage using the formula in figure 1. the value of r1 should be no greater than 124k to provide a minimum 5a load current so that errors in the output voltage, caused by the adj pin bias current, are minimized. note that in shutdown, the output is turned off and the divider current is zero. cur ves of adj pin voltage vs temperature and adj pin bias cur - rent vs temperature appear in the typical performance characteristics section.the adjustable device is tested and specified with the adj pin tied to the out pin, yielding v out = 0.6v. specifications for output voltages greater than 0.6v are proportional to the ratio of the desired output voltage to 0.6v: v out /0.6v. for example, load regulation for an output current change of 1ma to 100ma is 0.2mv (typical) at v out = 0.6v. at v out = 12v, load regulation is: 12v 0.6v ? (0.2mv) = 4mv downloaded from: http:///
lt3060 series 17 3060fc for more information www.linear.com/lt3060 table 1 shows 1% resistor divider values for some common output voltages with a resistor divider current of about 5a. table 1. output voltage resistor divider values v out (v) r1 (k ) r2 (k ) 1.2 118 118 1.5 121 182 1.8 124 249 2.5 115 365 3 124 499 3.3 124 562 5 115 845 12 124 2370 15 124 3010 bypass capacitance, output voltage noise and transient response the lt3060 regulators provide low output voltage noise over the 10hz to 100khz bandwidth while operating at full load with the addition of a reference bypass capacitor (c ref/byp ) from the ref/byp pin to gnd. a good quality, low leakage capacitor is recommended. this capacitor bypasses the internal reference of the regulator, provid - ing a low frequency noise pole. with the use of 10nf for c ref/byp, the output voltage noise decreases to as low as 30v rms when the output voltage is set for 0.6v. for higher output voltages (generated by using a feedback resistor divider), the output voltage noise gains up accordingly when using c ref/byp by itself. to lower the output voltage noise for higher output volt - ages, include a feedforward capacitor (c ff ) from v out to the adj pin. a good quality, low leakage capacitor is recommended. this capacitor bypasses the error amplifier of the regulator, providing a low frequency noise pole. with the use of 10nf for both c ff and c ref/byp , output voltage noise decreases to 30v rms when the output voltage is set to 5v by a 5a feedback resistor divider. if the current in the feedback resistor divider is doubled, c ff must also be doubled to achieve equivalent noise performance. higher values of output voltage noise are often measured if care is not exercised with regard to circuit layout and testing. crosstalk from nearby traces induces unwanted noise onto the lt3060s output. power supply ripple rejec - tion must also be considered. the lt3060 regulators do not have unlimited power supply rejection and will pass a small portion of the input noise through to the output. using a feedforward capacitor (c ff ) from v out to the adj pin has the added benefit of improving transient response for output voltages greater than 0.6v. with no feedforward capacitor, the settling time will increase as the output voltage is raised above 0.6v. use the equation in figure 2 to determine the minimum value of c ff to achieve a transient response that is similar to 0.6v output voltage performance regardless of the chosen output voltage (see figure 3 and transient response in the typical perf- ormance characteristics section). figure 2. feedforward capacitor for fast transient response figure 3. transient response vs feedforward capacitor applications information 3060 f02 in shdn out adj gnd ref/byp lt3060 v in v out c ref/byp c ff c out r2r1 100s/div v out = 5v c out = 10f i fb-divider = 5a 0 1nf 10nf load current 100ma/div feedforward capacitor, c ff 100pf 3060 f03 v out 50mv/div c ff 4.7nf 5a ? i fb ? divider ( ) i fb ? divider = v out r1 + r2 downloaded from: http:///
lt3060 series 18 3060fc for more information www.linear.com/lt3060 during start-up, the internal reference soft-starts if a reference bypass capacitor is present. regulator start- up time is directly proportional to the size of the bypass capacitor, slowing to 6ms with a 10nf bypass capacitor (see start-up time vs ref/byp capacitor in the typical performance characteristics section). the reference by - pass capacitor is actively pulled low during shutdown to reset the internal reference. start-up time is also affected by the use of a feedforward capacitor. start-up time is directly proportional to the size of the feedforward capacitor and output voltage, and is inversely proportional to the feedback resistor divider current, slowing to 15ms with a 4.7nf feedforward ca - pacitor and a 10f output capacitor for an output voltage set to 5v by a 5a feedback resistor divider. output capacitance the lt3060 regulators are stable with a wide range of output capacitors. the esr of the output capacitor af - fects stability, most notably with small capacitors. use a minimum output capacitor of 2.2f with an esr of 3 or less to prevent oscillations. if a feedforward capacitor is used with output voltages set for greater than 24v , use a minimum output capacitor of 4.7f. the lt3060 is a micropower device and output load transient response is a function of output capacitance. larger values of output capacitance decrease the peak deviations and provide improved transient response for larger load current changes. bypass capacitors, used to decouple individual components powered by the lt3060, increase the effec - tive output capacitor value. for applications with large load current transients, a low esr ceramic capacitor in parallel with a bulk tantalum capacitor often provides an optimally damped response. give extra consideration to the use of ceramic capacitors. manufacturers make ceramic capacitors with a variety of dielectrics, each with different behavior across tempera - ture and applied voltage. the most common dielectrics are specified with eia temperature characteristic codes of z5u, y5v, x5r and x7r. the z5u and y5v dielectrics provide high c-v products in a small package at low cost , but exhibit strong voltage and temperature coefficients, as shown in figures 4 and 5. when used with a 5v regulator, a 16v 10f y5v capacitor can exhibit an effective value as low as 1f to 2f for the dc bias voltage applied, and over the operating temperature range. the x5r and x7r dielectrics yield much more stable characteristics and are more suitable for use as the output capacitor. the x7r type works over a wider temperature range and has better temperature stability, while the x5r is less expensive and is available in higher values. care still must be exercised when using x5r and x7r ca - pacitors; the x5r and x7r codes only specify operating temperature range and maximum capacitance change over temperature. capacitance change due to dc bias with x5r and x7r capacitors is better than y5v and z5u figure 4. ceramic capacitor dc bias characteristics applications information dc bias voltage (v) change in value (%) 3060 f04 20 0 C20C40 C60 C80 C100 0 4 8 10 2 6 12 14 x5r y5v 16 both capacitors are 16v,1210 case size, 10f temperature (c) C50 40 20 0 C20C40 C60 C80 C100 25 75 3060 f05 C25 0 50 100 125 y5v change in value (%) x5r both capacitors are 16v,1210 case size, 10f figure 5. ceramic capacitor temperature characteristics downloaded from: http:///
lt3060 series 19 3060fc for more information www.linear.com/lt3060 4ms/div 3060 f06 v out 500v/div v out = 0.6v c out = 10f c ref/byp = 10nf i load = 100ma figure 6. noise resulting from tapping on a ceramic capacitor applications information capacitors, but can still be significant enough to drop capacitor values below appropriate levels. capacitor dc bias characteristics tend to improve as component case size increases, but expected capacitance at operating voltage should be verified. voltage and temperature coefficients are not the only sources of problems. some ceramic capacitors have a piezoelectric response. a piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the way a piezoelectric accelerometer or mi - crophone works. for a ceramic capacitor, the stress is induced by vibrations in the system or thermal transients. the resulting voltages produced cause appreciable amounts of noise. a cer amic capacitor produced the trace in figure 6 in response to light tapping from a pencil. similar vibration induced behavior can masquerade as increased output voltage noise. allowing the regulator to supply large output currents. with a high input voltage, a problem can occur wherein the removal of an output short will not allow the output to recover. other regulators, such as the lt1083/lt1084/ lt1085 family and lt1764a also exhibit this phenomenon, so it is not unique to the lt3060. the problem occurs with a heavy output load when the input voltage is high and the output voltage is low. common situations are: (1) immediately after the removal of a short-circuit or (2) if the shutdown pin is pulled high after the input voltage is already turned on. the load line intersects the output current curve at two points creating two stable output operating points for the regulator. with this double intersection, the input power supply needs to be cycled down to zero and brought up again for the output to recover. thermal considerations the power handling capability of the device will be limited by the maximum rated junction temperature (125c for lt3060e, lt3060i or 150c for lt3060mp, lt3060h). two components comprise the power dissipated by the device: 1. output current multiplied by the input/output voltage differential: i out ? (v in Cv out ), and 2. gnd pin current multiplied by the input voltage: i gnd ? v in gnd pin current is determined using the gnd pin current curves in the typical performance characteristics section. power dissipation equals the sum of the two components listed above. the lt3060 regulators have internal thermal limiting that protects the device during overload conditions. for continu - ous normal conditions, the maximum junction temperature of 125c (e-grade, i-grade) or 150c (mp-grade, h-grade) must not be exceeded. carefully consider all sources of thermal resistance from junction-to-ambient including other heat sources mounted in proximity to the lt3060. the underside of the lt3060 dfn package has exposed metal (1mm 2 ) from the lead frame to the die attachment. the package allows heat to directly transfer from the die junction to the printed circuit board metal to control maxi - mum operating junction temperature. the dual-in-line pin arrangement allows metal to extend beyond the ends of overload recovery like many ic power regulators, the lt3060 has safe operating area protection. the safe operating area protec - tion decreases current limit as input-to-output voltage increases, and keeps the power transistor inside a safe operating region for all values of input-to-output voltage. the lt3060 provides some output current at all values of input-to-output voltage up to the specified 45v operational maximum. when power is first applied, the input voltage rises and the output follows the input; allowing the regulator to start-up into very heavy loads. during start-up, as the input voltage is rising, the input-to-output voltage differential is small, downloaded from: http:///
lt3060 series 20 3060fc for more information www.linear.com/lt3060 the package on the topside (component side) of a pcb. connect this metal to gnd on the pcb. the multiple in and out pins of the lt3060 also assist in spreading heat to the pcb. for surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the pc board and its copper traces. copper board stiffeners and plated through-holes also can spread the heat generated by power devices. tables 2 and 3 list thermal resistance for several different board sizes and copper areas. all measurements were taken in still air on a 4 layer fr-4 board with 1oz solid internal planes and 2oz top/bottom external trace planes with a total board thickness of 1.6mm. the four layers were electrically isolated with no thermal vias present. pcb layers, copper weight, board layout and thermal vias will affect the resul - tant thermal resistance. for more information on thermal resistance and high thermal conductivity test boards, refer to jedec standard jesd51, notably jesd51-12 and jesd51-7. achieving low thermal resistance necessitates attention to detail and careful pcb layout. table 2. dc package, 8-lead dfn copper area board area (mm 2 ) thermal resistance (junction-to-ambient) topside* (mm 2 ) backside (mm 2 ) 2500 2500 2500 48c/w 1000 2500 2500 49c/w 225 2500 2500 50c/w 100 2500 2500 54c/w 50 2500 2500 60c/w *device is mounted on topside table 3. ts8 package, 8 lead tsot-23 copper area board area (mm 2 ) thermal resistance (junction-to-ambient) topside* (mm 2 ) backside (mm 2 ) 2500 2500 2500 57c/w 1000 2500 2500 58c/w 225 2500 2500 59c/w 100 2500 2500 63c/w 50 2500 2500 67c/w *device is mounted on topside calculating junction temperature example: given an output voltage of 2.5v, an input volt- age range of 12v 5%, an output current range of 0ma to 50ma and a maximum ambient temperature of 85c, what will the maximum junction temperature be? the power dissipated by the device equals: i out(max) ? (v in(max) Cv out ) + i gnd ? v in(max) where, i out(max) = 50ma v in(max) = 12.6v i gnd at (i out = 50ma, v in = 12.6v) = 0.6ma so, p = 50ma ? (12.6v C 2.5v) + 0.6ma ? 12.6v = 0.513w using a dfn package, the thermal resistance ranges from 48c/w to 60c/w depending on the copper area with no thermal vias. so the junction temperature rise above ambient approximately equals: 0.513w ? 54c/w = 27.8c the maximum junction temperature equals the maximum ambient temperature plus the maximum junction tempera - ture rise above ambient or: t jmax = 85c + 27.8c = 112.8c protection features the lt3060 regulators incorporate several protection features that make it ideal for use in battery-powered circuits. in addition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device also protects against reverse-input voltages, reverse-output voltages and reverse output-to-input voltages. current limit protection and thermal overload protection protect the device against current overload conditions at the output of the device. the typical thermal shutdown temperature is 165c. for normal operation, do not exceed a junction temperature of 125c (lt3060e, lt3060i) or 150c (lt3060mp, lt3060h). applications information downloaded from: http:///
lt3060 series 21 3060fc for more information www.linear.com/lt3060 applications information the lt3060 in pin withstands reverse voltages up to 50v. the device limits current flow to less than 300a (typi - cally less than 50a) and no negative voltage appears at out . the device protects both itself and the load against batteries that are plugged in backwards.the shdn pin cannot be driven below gnd unless tied to the in pin. if the shdn pin is driven below gnd while in is powered, the output may turn on. shdn pin logic cannot be referenced to a negative supply voltage. the lt3060 incurs no damage if its output is pulled be - low ground. if the input is left open-circuit or grounded, the output can be pulled below ground by 50v . no cur - rent flows through the pass transistor from the output. however , current flows in (but is limited by) the resistor divider that sets the output voltage. current flows from the bottom resistor in the divider and from the adj pin s internal clamp through the top resistor in the divider to the external circuitr y pulling out below ground. if the input is powered by a voltage source, the output sources current equal to its current limit capability and the lt3060 protects itself by thermal limiting. in this case, grounding the shdn pin turns off the device and stops the output from sourcing current. the lt3060 incurs no damage if the adj pin is pulled above or below ground by less than 50v. for the adjust- able version, if the input is left open-circuit or grounded, the adj pin performs like a large resistor (typically 30k) in series with a diode when pulled below ground, and like 30k in series with two diodes when pulled above ground. in circuits where a backup battery is required, several different input/output conditions can occur. the output voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage or left open- circuit. current flow back into the output follows the curve shown in figures 7 and 8. if the lt3060s in pin is forced below the out pin or the out pin is pulled above the in pin, input current typically drops to less than 1a. this occurs if the lt3060 input is connected to a discharged (low voltage) battery and either a backup battery or a second regulator holds up the output. the state of the shdn pin has no effect on the reverse current if the output is pulled above the input. output voltage (v) 0 0 reverse output current (ma) 1.4 1.6 1.81.2 1.0 0.8 0.4 0.60.2 2.0 5 30 35 40 45 10 15 20 3060 f07 25 adj out t j = 25c v in = 0v current flowsinto out pin v out = v adj figure 7. lt3060 reverse output current figure 8. lt3060-1.2/-1.5/-1.8/-2.5/-3.3/-5/-15 reverse output current output voltage (v) 0 0 reverse output current (a) 250150 200100 50 350300 5 30 35 40 45 10 15 20 3060 f08 25 lt3060-1.2 lt3060-5 lt3060-15 lt3060-1.5 lt3060-1.8 lt3060-2.5 lt3060-3.3 t j = 25c v in = 0v downloaded from: http:///
lt3060 series 22 3060fc for more information www.linear.com/lt3060 typical application + in gnd ref/byp shdn out adj lt3060 in gnd ref/byp shdn out adj lt3060 v in > 2.9v c12.2f r1 0.15 r2 0.15 r3 200 r4200 c510nf c41nf c31nf 2.5v200ma c24.7f r51k 32 74 6 shdn C + r81.91k 1% r61.74k 1% r7 604 1% r9604 1% lt1637 3060 ta03 paralleling of regulators for higher output current downloaded from: http:///
lt3060 series 23 3060fc for more information www.linear.com/lt3060 dc package 8-lead plastic dfn (2mm 2mm) (reference ltc dwg # 05-08-1719 rev a) 2.00 0.10 (4 sides) note:1. drawing is not a jedec package outline 2. drawing not to scale 3. all dimensions are in millimeters 4. dimensions of exposed pad on bottom of package do not include mold flash. mold flash, if present, shall not exceed 0.15mm on any side 5. exposed pad shall be solder plated 6. shaded area is only a reference for pin 1 location on the top and bottom of package 0.40 0.10 bottom view?exposed pad 0.64 0.10 (2 sides) 0.75 0.05 r = 0.115 typ r = 0.05 typ 1.37 0.10 (2 sides) 1 4 8 5 pin 1 bar top mark (see note 6) 0.200 ref 0.00 ? 0.05 (dc8) dfn 0409 reva 0.23 0.05 0.45 bsc 0.25 0.05 1.37 0.05 (2 sides) recommended solder pad pitch and dimensions apply solder mask to areas that are not soldered 0.64 0.05 (2 sides) 1.15 0.05 0.70 0.05 2.55 0.05 packageoutline 0.45 bsc pin 1 notch r = 0.20 or 0.25 45 chamfer package description please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. downloaded from: http:///
lt3060 series 24 3060fc for more information www.linear.com/lt3060 1.50 C 1.75 (note 4) 2.80 bsc 0.22 C 0.36 8 plcs (note 3) datum a 0.09 C 0.20 (note 3) ts8 tsot-23 0710 rev a 2.90 bsc (note 4) 0.65 bsc 1.95 bsc 0.80 C 0.90 1.00 max 0.01 C 0.10 0.20 bsc 0.30 C 0.50 ref pin one id note:1. dimensions are in millimeters 2. drawing not to scale 3. dimensions are inclusive of plating 4. dimensions are exclusive of mold flash and metal burr 5. mold flash shall not exceed 0.254mm 6. jedec package reference is mo-193 3.85 max 0.40 max 0.65 ref recommended solder pad layout per ipc calculator 1.4 min 2.62 ref 1.22 ref ts8 package 8-lead plastic tsot-23 (reference ltc dwg # 05-08-1637 rev a) package description please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. downloaded from: http:///
lt3060 series 25 3060fc for more information www.linear.com/lt3060 information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no representa - tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. revision history rev date description page number a 7/10 added fixed voltage options for 1.2v, 1.5v, 1.8v, 2.5v, 3.3v and 5v 1-26 b 5/11 extended mp-grade to 150c updated test conditions for adj pin bias current and reverse output current in applications information section 2-7 19-20 c 9/14 added fixed voltage options for 15v updated available packaging in related parts section 1 to 14, 17, 21 26 downloaded from: http:///
lt3060 series 26 3060fc for more information www.linear.com/lt3060 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 ? linear technology corporation 2010 lt 0914 rev c ? printed in usa (408) 432-1900 fax : (408) 434-0507 www.linear.com/lt3060 related parts part number description comments lt1761 100ma, low noise ldo 300mv dropout voltage, low noise: 20v rms , v in = 1.8v to 20v, thinsot package lt1762 150ma, low noise ldo 300mv dropout voltage, low noise: 20v rms , v in = 1.8v to 20v, ms8 package lt1763 500ma, low noise ldo 300mv dropout voltage, low noise: 20v rms , v in = 1.8v to 20v, so8 and 4mm 3mm dfn packages lt1764/ lt1764a 3a, fast transient response, low noise ldo 340mv dropout voltage, low noise: 40v rms , v in = 2.7v to 20v, to-220 and dd packages, lt1764a version stable also with ceramic capacitors lt1962 300ma, low noise ldo 270mv dropout voltage, low noise: 20v rms , v in = 1.8v to 20v, ms8 package lt1963/ lt1963a 1.5a low noise, fast transient response ldo 340mv dropout voltage, low noise: 40v rms , v in = 2.5v to 20v, lt1963a version stable with ceramic capacitors; to-220, dd, sot-223 and so8 packages lt1964 200ma, low noise, negative ldo 340mv dropout voltage, low noise 30v rms , v in = C1.8v to C20v, thinsot and 3mm 3mm dfn packages lt1965 1.1a, low noise, low dropout linear regulator 290mv dropout voltage, low noise: 40v rms , v in : 1.8v to 20v, v out : 1.2v to 19.5v, stable with ceramic capacitors; to-220, dd-pak, msop and 3mm 3mm dfn packages lt3008 20ma, 45v, 3a i q micropower ldo 300mv dropout voltage, low i q : 3a, v in = 2v to 45v, v out = 0.6v to 39.5v; thinsot and 2mm 2mm dfn-6 packages lt3009 20ma, 3a i q micropower ldo 280mv dropout voltage, low i q : 3a, v in = 1.6v to 20v, 2mm 2mm dfn and sc70 packages lt3050 100ma, low noise linear regulator with precision current limit and diagnostic functions. 340mv dropout voltage, low noise: 30v rms , v in : 1.6v to 45v, v out : 0.6v to 44.5v, programmable precision current limit: 5%, programmable minimum i out monitor, output current monitor, fault indicator, reverse protection; 12-lead 2mm 3mm dfn and msop packages. lt3080/ lt3080-1 1.1a, parallelable, low noise, low dropout linear regulator 300mv dropout voltage (2-supply operation), low noise: 40v rms , v in : 1.2v to 36v, v out : 0v to 35.7v, current-based reference with 1-resistor v out set; directly parallelable (no op amp required), stable with ceramic capacitors; to-220, sot-223, msop and 3mm 3mm dfn packages; lt3080-1 version has integrated internal ballast resistor lt3082 200ma, parallelable, single resistor, low dropout linear regulator outputs may be paralleled for higher output, current or heat spreading, wide input voltage range: 1.2v to 40v low v alue input/output capacitors required: 0.22f, single resistor sets output voltage, initial set pin current accuracy: 1%, low output noise: 40v rms (10hz to 100khz) reverse-battery protection, reverse-current protection; 8-lead sot-23, 3-lead sot-223 and 8-lead 3mm 3mm dfn packages lt3085 500ma, parallelable, low noise, low dropout linear regulator 275mv dropout voltage (2-supply operation), low noise: 40v rms , v in : 1.2v to 36v, v out : 0v to 35.7v, current-based reference with 1-resistor v out set, directly parallelable (no op amp required), stable with ceramic capacitors; ms8e and 2mm 3mm dfn-6 packages lt3092 200ma 2-terminal programmable current source programmable 2-t erminal current source, maximum output current: 200ma, wide input voltage range: 1.2v to 40v, resistor ratio sets output current, initial set pin current accuracy: 1%, current limit and thermal shutdown protection, reverse-voltage protection, reverse-current protection; 8-lead sot-23, 3-lead sot-223 and 8-lead 3mm 3mm dfn packages 12v low noise regulator typical application 3060 ta04 in shdn out adj gnd ref/byp lt3060 v in 13v to45v v out 12v at 100ma 30v rms noise 1f 10f c ff 10nf 2.37m1% 10nf 124k1% 0 0.1 0.2 0.7 0.8 0.9 1.0 0.3 0.4 0.5 0.6 time (ms) output voltage deviation 50mv/div load current 100ma/div 3060 ta04b v in = 13v c ff = 0 c ff = 10nf ?i l = 10ma to 100ma downloaded from: http:///

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