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aic1722a 300ma low dropout linear regulator analog integrations corporation si-soft research center ds-1722ag-04 20120615 3a1, no.1, li-hsin rd. i , science park , hsinchu 300, taiwan , r.o.c. tel: 886-3-5772500 fax: 886-3-5772510 www.analog.com.tw 1 ? features ? low dropout voltage of 470mv at 300ma output current (3.0v output version). ? guaranteed 300ma output current. ? maximum input voltage is 8v ? low ground current at 55 ? a. ? 2% accuracy output voltage of 1.5v/1.8v/ 2.0v /2.5v /2.7v/ 3.0v/ 3.3v/ 3.5v/ 3.7v/ 3.8v/ 5.0v/ 5.2v. ? needs only 1 ? f for stability. ? current and thermal limiting. ? applications ? voltage regulator for cd-rom drivers. ? voltage regulator for lan cards. ? voltage regulator for microprocessor. ? wireless communication systems. ? battery powered systems. ? description the aic1722a is a 3-pin low dropout linear regulator. the superior characteristics of the aic1722a include zero base current loss, very low dropout volt age, and 2% accuracy output voltage. typical ground current remains approximately 55 ? a, from no load to maximum loading conditions. dropout voltage at 300ma output current is exceptionally low. output current limiting and thermal limiting are built in to provide maximal protection to the aic1722a against fault conditions. the aic1722a comes in the popular 3-pin sot-89, to-92 and sot-23 packages. ? typical application circuit + + aic1722a c out 1 ? f (note1) v out vout gnd vin c in 1 ? f v in low dropout linear regulator
aic1722a 2 ? ordering information pin configuration sot-89 (xt) top view 1: vout 2. gn d 3. vin sot-89 (xa) top view 1: gn d 2. vin 3. vout to-92 (ztbg) top view 1: gn d 2. vin 3. vout * straight lead option available in bag packing type only. * refer to physical dimensions for lead pitch. to-92 (zlbg) top view 1: vin 2. gn d 3. vout * straight lead option available in bag packing type only. * refer to physical dimensions for lead pitch. 1 2 3 1 2 3 pa c k i n g ty pe tr : re el bg: bag package type u: sot-23 xa: sot-89 xt: sot-89 zt: to-92 zl: to-92 p: lead free commercial g: green package ou tput voltage 15: 1.5v 18: 1.8v 20: 2.0v 25: 2.5v 27: 2.7v 30: 3.0v 33: 3.3v 35: 3.5v 37: 3.7v 38: 3.8v 50: 5.0v 52: 5.2v a ic1 722a-xxxxx xx exa mple: aic 1722a-18pxatr ? 1.8v version, in sot-89 package & tape & r eel packing type(lead free) aic 1722 a-18gxatr ? 1.8v version, in sot-89 l ead free package & tape & reel packing ty pe (g re en) sot-23 (u) top view 1: gn d 2: vout 3: vin 3 1 2 to-92 (zttr) top view 1: gn d 2. vin 3. vout * formed lead option available in reel packing type. * refer to physical dimensions for lead pitch. 1 2 3 1 2 3 1 2 3 1 2 3 to-92 (zlbg) top view 1: vin 2. gn d 3. vout * formed lead option available in reel packing type. * refer to physical dimensions for lead pitch. 1 2 3 1 2 3 1 2 3 1 2 3
aic1722a 3 ? sot-23 marking part no. pu gu part no. pu gu aic1722a-15xu bn15p bn15g aic1722a-33xu bn33p bn33g aic1722a-18xu bn18p bn18g aic1722a-35xu bn35p bn35g AIC1722A-20XU bn20p bn20g aic1722a-37xu bn37p bn37g aic1722a-25xu bn25p bn25g aic1722a-38xu bn38p bn38g aic1722a-27xu bn27p bn27g aic1722a-50xu bn50p bn50g aic1722a-30xu bn30p bn30g aic1722a-52xu bn52p bn52g ? sot-89 marking part no. pxa gxa part no. pxt gxt aic1722a-15xxa al15p al15g ai c1722a-15xxt ba15p ba15g aic1722a-18xxa al18p al18g ai c1722a-18xxt ba18p ba18g aic1722a-20xxa al20p al20g ai c1722a-20xxt ba20p ba20g aic1722a-25xxa al25p al25g ai c1722a-25xxt ba25p ba25g aic1722a-27xxa al27p al27g ai c1722a-27xxt ba27p ba27g aic1722a-30xxa al30p al30g ai c1722a-30xxt ba30p ba30g aic1722a-33xxa al33p al33g ai c1722a-33xxt ba33p ba33g aic1722a-35xxa al35p al35g ai c1722a-35xxt ba35p ba35g aic1722a-37xxa al37p al37g ai c1722a-37xxt ba37p ba37g aic1722a-38xxa al38p al38g ai c1722a-38xxt ba38p ba38g aic1722a-50xxa al50p al50g ai c1722a-50xxt ba50p ba50g aic1722a-52xxa al52p al52g ai c1722a-52xxt ba52p ba52g ? absolute maximum ratings input supply voltage ............................................ .......????..??.... .............. - 0.3~8v operating temperature range ?????.....???...... ..????................ - 40? c~ 85 ? c junction temperature ??????????????????????????... 125 ? c storage temperature range ................ ....??......................???... .......... -65? c~150 ? c lead temperature (soldering. 10sec) ???????????????????? 260 ? c thermal resistance junction to case sot-23 ????????????. 130 ? c /w sot-89 ?..??????..????.. 30 ? c /w to-92 ????????????? 120 ? c /w thermal resistance junction to ambient sot-23 ..???????????? 180 ? c /w (assume no ambient airflow, no heatsink) sot-89 ????????????. 160 ? c /w to-92 ????????????? 150 ? c /w absolute maximum ratings are those values beyond which the life of a device may be impaired.
aic1722a 4 ? test circuit refer to the typical application circuit. ? electrical characteristics (t a =25 ? c, c in =1 ? f, c out =1 ? f, unless otherwise specified.) (note 2) parameter test conditions min. typ. max. unit output voltage v in =8v, no load -2 +2 % line regulation i l = 1ma, 1.4v ? v out ? 3.2v 3.3v ? v out ? 5.2v v in =4v~8v v in =5.5v~8v 3 3 10 15 mv load regulation (note 3) i l =0.1~300ma 1.4v ? v out ? 3.9v 4.0v ? v out ? 5.2v v in =5v v in =7v 7 15 20 40 mv current limit (note 4) v in =7v, v out =0v 300 ma dropout voltage (note 5) i l =300ma 4.0v ? v out ? 5.2v 3.0v ? v out ? 3.9v 2.5v ? v out ? 2.9v 2.0v ? v out ? 2.4v 1.4v ? v out ? 1.9v 400 470 570 800 1260 500 570 670 900 1360 mv ground current i o =0.1ma~i max 1.4v ? v out ? 3.9v 4.0v ? v out ? 5.2v v in =5~8v v in =7~8v 55 55 80 80 ? a thermal shutdown hysteresis guaranteed by design 20 oc note 1: to avoid output oscillation, aluminum elec trolytic output capacitor is recommended and ceramic capacitor is not suggested. note 2: specifications are production tested at t a =25 ? c. specifications over the - 40? c to 85 ? c operating temperature range are assured by design, characteri zation and correlation with statistical quality controls (sqc). note 3: regulation is measured at constant junction te mperature, using pulse testing with a low on time. note 4: current limit is measured by pulsing a short time. note 5: dropout voltage is defined as the input to output differential at whic h the output voltage drops 100mv below the value measured with a 1v differential.
aic1722a 5 ? typical performance characteristics -40 -20 0 20 40 60 80 100 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 a ic1722 a -18 v out (v) temperature ( o c) fig. 1 v out vs. temperature -40 -20 0 20 40 60 80 100 2.46 2.47 2.48 2.49 2.50 2.51 2.52 a ic1722a-25 fig. 2 v out vs. temperature v out (v) temperature ( ? c) -40 -20 0 20 40 60 80 100 3.10 3.15 3.20 3.25 3.30 3.35 3.40 fig. 3 v out vs. temperature v out (v) temperature ( ? c) a ic1722a-33 -40 -20 0 20 40 60 80 10 0 5.10 5.15 5.20 5.25 5.30 v out (v) temperature ( ? c) fig. 4 v out vs. temperature a ic1722a-52 -40 -20 0 20 40 60 80 40 42 44 46 48 50 52 54 56 58 60 a ic1722 a -18 temperature( ? c) fig. 5 ground current vs. temperature i load =100ma i load =300ma i load =0ma ground current( ? a) ground current ( ? a) -40 -20 0 20 40 60 80 45 50 55 60 65 70 a ic1722a-25 temperature ( ?c) fig. 6 ground current vs. temperature i load =100ma i load =300ma i load =0ma
aic1722a 6 ? typical performance characteristics (continued) -40 -20 0 20 40 60 80 40 45 50 55 60 65 70 75 80 a ic1722a-33 fig. 7 ground current vs. temperature ground current ( ? a) temperature ( ?c) i load = 300ma i load = 0ma i load = 100ma temperature ( ? c) -40 -20 0 20 40 60 80 46 48 50 52 54 56 58 60 i load =0ma fig. 8 ground current vs. temperature ground current ( ? a) a ic1722a-52 i load =100ma i load =300ma 0 1 2 3 4 5 6 7 8 0 10 20 30 40 50 60 70 a ic1722 a -18 ground current ( ? a ) v in (v) fig. 9 ground current vs. v in 0 1 2 3 4 5 6 7 8 0 10 20 30 40 50 60 a ic1722a - 25 ground current ( ? a) v in (v) fig. 10 ground current vs. v in 0 1 2 3 4 5 6 7 8 0 10 20 30 40 50 60 70 fig. 11 ground current vs. v in ground current ( ? a) a ic1722a-33 v in (v) 0 1 2 3 4 5 6 7 8 0 10 20 30 40 50 60 70 a ic1722a-52 fig.12 ground current vs. v in ground current (ua) v in (v)
aic1722a 7 ? typical performance characteristics (continued) 0 50 100 150 200 250 300 400 500 600 700 800 900 1000 t=20 c t=80 c t=50 c a ic1722 a -18 v drop (v) i load (ma) fig. 13 v drop vs. i load t=-40 c 0 50 100 150 200 250 300 0 100 200 300 400 500 t=80 q c a ic1722a-25 v drop (mv) i load (ma) fig. 14 v drop vs. i load t=50 q c t=20 q c t=-40 q c 0 60 120 180 240 300 0 60 120 180 240 300 360 a ic1722a-33 fig. 15 v drop vs. i load v drop (mv) i load (ma) t=50 q c t=80 q c t=20 q c t=-40 q c a ic1722a-52 t=80 q c t=50 q c t=20 q c t=-40 q c 0 50 100 150 200 250 300 0 50 100 150 200 250 300 fig. 16 v drop vs. i load v drop (mv) i load (ma) -40 -20 0 20 40 60 80 460 470 480 490 500 510 520 530 540 v in =7v v in =6v v in =5v a ic1722a currnet limit (ma) temperature ( qc) fig. 17 current limit vs. temperature v in =4v
aic1722a 8 ? block diagram 1.235v reference gnd vout vin error a mp + - thermal shutdown - + current limiting ? pin descriptions vout pin - output pin. gnd pin - power gnd. vin pin - power supply input.
aic1722a 9 ? application information input-output capacitors linear regulators require input and output capacitors to maintain stability. input capacitor at 1 ? f with 1uf aluminum electrolytic output capacitor is recommended. power dissipation the aic1722a obtains thermal-limiting circuitry, which is designed to protect the device against overload condition. for continuous load condition, maximum rating of junction temperature must not be exceeded. it is important to pay more attention in thermal resistance. it includes junction to case, junction to ambient. the maximum power dissipation of aic1722a depends on the thermal resistance of its case and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. the rate of temperature rise is greatly affected by the mounting pad configuration on the pcb, the board material, and the ambient temperature. when the ic mounting with good thermal conductivity is used, the junction temperature will be low even when large power dissipation applies. the power dissipation across the device is p = i out (v in -v out ). the maximum power dissipation is: ja a max-j max r )t-(t p ? where t j-max is the maximum allowable junction temperature (125 ? c), and t a is the ambient temperature suitable in application. as a general rule, the lower temperature is, the better reliability of the device is. so the pcb mounting pad should provide maximum thermal conductivity to maintain low device temperature. gnd pin performs a dual function for providing an electrical connection to ground and channeling heat away. therefore, connecting the gnd pin to ground with a large pad or ground plane would increase the power dissipation and reduce the device temperature.
aic1722a 10 ? physical dimensions (unit: mm) ? sot-23 c a a2 b with plating view b l1 l seating plane gauge plane 0.25 a1 section a-a base metal e1 e d e aa e1 see view b note: 1. refer to jedec mo-178. 2. dimension "d" does not include mold flash, protrus ions or gate burrs. mold flash, protrusion or gate bur rs shall not exceed 10 mil per side. 3. dimension "e1" does not include inter-lead flash o r protrusions. 4. controlling dimension is millimeter, converted inc h dimensions are not necessarily exact. 0 0.90 0.30 1.50 2.60 2.80 0.08 0.30 0.00 e l1 l e1 c e e1 d b a2 a1 0.95 bsc 8 0.60 1.90 bsc 0.60 ref 1.30 1.70 3.00 3.00 0.22 0.50 0.15 0.95 min. s y m b o l a1 . 4 5 max. sot-23 millimeters
aic1722a 11 ? sot-89 a c e1 e b b1 d d1 h e l 0.36 0.89 3.94 2.29 1.50 4.40 0.35 0.44 e1 l h d e e d1 c b1 b 3.00 bsc 1.20 4.25 0.48 2.60 1.83 4.60 0.44 0.56 1.50 bsc 1.40 min. s y m b o l a1 . 6 0 max. sot-89 millimeters note: 1. refer to jedec to-243aa. 2. dimension "d" does not include mold flash, protrus ions or gate burrs. mold flash, protrusion or gate bur rs shall not exceed 6 mil per side. 3. dimension "e" does not include inter-lead flash or protrusions . 4. controlling dimension is millimeter, converted inc h dimensions are not necessarily exact.
aic1722a 12 ? to-92 (straight lead option availa ble in bag packing type only) b s a e d j e1 e l millimeters to-92 max. 5.33 a s y m b o l min. 4.32 0.47 4.19 2.66 1.39 5.20 2.66 b d e e1 l j e s 0.36 3.18 2.42 1.15 3.43 12.70 4.45 2.03 note: 1. refer to jedec to-226. 2. dimension "d" does not include mold flash, protrus ions or gate burrs. mold flash, protrusion or gate bur rs shall not exceed 6 mil per side . 3. dimension "a" does not include inter-lead flash or protrusions. 4. controlling dimension is millimeter, converted inc h dimensions are not necessarily exact.
aic1722a 13 ? to-92 (formed lead option available in reel packing) note: information provided by aic is believed to be accurate and reliabl e. however, we cannot assume responsibility for use of any ci rcuitry other than circuitry entirely embodied in an aic product; nor for any infringement of patents or other rights of third parties that may result from its use. we reserve the right to change the circuitry and specifications without notice. life support policy: aic does not authorize any aic product for us e in life support devices and/or systems. life support device s or systems are devices or systems which, (i) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expe cted to result in a significant injury to the user. f e t p1 b d p a w e f 19.0 0.5 e b 16.0 0.5 a 9.0 0.2 6.0 0.20 t 0.6 0.1 e 2.5 bsc p1 12.7 bsc 4.0 0.2 d w 18.0 0.2 symbol spec. p 1 2 .7 b s c spec. symbol

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