bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com to-220-5 package top view bay b29151/52/53 12345 output gnd flag 1) 3) 4) 5) 2) input enable output gnd adjust 1) 3) 4) 5) 2) input enable output gnd adjust 1) 3) 4) 5) 2) input flag b29151 b29152 b29153 1.5a high current low dropout b29150 voltage regulator adjustable & fix output preliminary information pin connection ordering information devices package temp. b29150t to-220-3 -40 c to 125 c b29151/2/3t to-220-5 -40 c to 125 c b29150s to-263-3 -40 c to 125 c b29151/2/3s to-263-5 -40 c to 125 c b29150j lpdd-3 -40 c to 125 c b29151/2/3j lpdd-5 -40 c to 125 c description the bay linear b29150 is a 1.5a high accuracy, low dr opout voltage regulator with only 350mv(typ.)@ 1.5a). the b29150 is designed for low voltage a application that requires lower dropout voltage and faster transient response. this device is an excellent choice for use in powering low voltage microprocessor that require a lower dropout, faster transient response to regulate from +2.5v to 3.8v supplies and as a post regulator for switching supplies applications. the b29150 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. on-chip trimming adjusts the reference voltage to 1%. features such as enable pin, error flag pin are also included in the 5 pin packages . the b29150 is offer in a new lpdd (low profile to-263) package from 4.47 mm (dd) tickness down to only 1.27 mm (lpdd) total tickness. the b29150 are offered in a 3 & 5-pin to-220 & to-263 package compatible with other 3 terminal regulators. for a 3a low dropout regulator refer to the b39300 data sheet. features ? adjustable & fix output ? 1% output accuracy @2.5v, 3.3v, @ 5.0v ? output current of 1.5a ? low dropout voltage of 350mv @ 1.5a ? extremely tight load & line regulation ? reverse-battery and ?load dump? protection ? zero current shutdown mode (5-pin version) ? error flag signal output-of-regulation (5-pin version) ? offer in to-263, to-220, & new slim lpdd ? similar to industry standard mic29150 applications ? powering vga & sound card ? lcd monitor ? usb power supply ? smps post regulator ? high efficiency ?green? computer system ? adjustable power supply bay linear bay linear bay linear bay linear ins p ire the linear power ins p ire the linear power ins p ire the linear power ins p ire the linear power to-263-3 package v out gnd v in bay b29150 front view 123 output to-263-5 package top view 45 bay b29151/52/53 3 2 1 gnd flag 1) 3) 4) 5) 2) input enable gnd adjust 1) 3) 4) 5) 2) input enable gnd adjust 1) 3) 4) 5) 2) input flag output output b29151 b29152 b29153 front view to-220-3 package bay b29150 v in v out gnd
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com b29150 absolute maximum ratings lead temp. (soldering, 5 seconds) ................................ 260c input voltage.......................................... .............. 26v storage temperature range .............................. -65 to +150c maximum output current .................................. .3.5a operating junction temperature range input supply voltage (note1) (survival)-20v to +60v b29150/51/52/53 control section ............. -45c +125c b29150/51/52/53 power transistor ............-45c +150c electrical characteristics (note 1) at i out = 10ma, t a =25 c, unless otherwise specified. parameter conditions typ b29150/51/52/53 min max units 2.5v version output voltage (note 2) i out = 10ma 10ma i out 1.5a, 4.75v v in 26v 2.5 2.5 2.475 2.450 2.525 2.550 v 3.3v version2. output voltage (note 2) i out = 10ma 10ma i out 1.5a, 4.75v v in 26v 3.3 3.3 3.267 3.234 3.330 3.366 v 5.0v version output voltage (note 2) i out = 10ma 10ma i out 1.5a, 5.5v v in 26v 5.0 5.0 4.95 4.90 5.05 5.10 v all voltage options line regulation i o = 10ma, (v out + 1v) v in 26v 0.06 0.5 % load regulation v in = v out + 5v, 10ma i out i fullload (note 2, 6) 0.2 1 % ? v 20 100 ppm/ c ? t output voltage (note 6) temperature coef. i o = 100ma 80 200 i o = 750ma 220 dropout voltage i o = 1.5a 350 600 mv ground current i o = 750ma, v in = v out , +1v i o = 1.5a 8 25 20 ma i gnddo ground pin current at dropout v in = 0.5v less than specified v out i out = 10ma 0.9 ma current limit v out = 0v (note 4) 1.7 1.5 a output noise voltage (10hz to 100khz) i l = 100ma c l = 10 f c l = 33 f 400 260 v rms reference voltage 1.240 1.228 1.215 1.252 1.265 v reference voltage (note 8)` 1.203 1.277 v adjust pin bias current 40 80 120 na reference voltage temperature coefficient (note 7) 20 ppm/ c adjust pin bias current temperature coefficient 0.1 na/ c flag output (error comparator) b29152/53 output leakage current v oh = 26v 0.01 1.00 2.00 a output low voltage device set for 5v. v in = 4.5v i ol = 250 a 220 300 400 mv
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com b29150 upper threshold voltage device set for 5v (note 9) 60 40 25 mv lower threshold voltage device set for 5v (note 9) 75 95 140 mv hysteresis device set for 5v (note 9) 15 mv enable input b29152/53 input logic voltage low (off) high (on) 2.4 0.8 v v en = 26v 100 600 750 v enable pin input current v en = 0.8v 2.5 5 a regulator output current in shutdown (note 10) 10 500 a notes: the bold specifications apply to the full operating temperature range. note 1: maximum positive supply voltage of 60v must be of limited duration (<100msec) and duty cycle.) the maximum continuous supply voltage is 16v. note 2: full load current (i fl ) is defined as 1.5a for the b29150/51/52/53. note 3: dropout voltage is defined as the input-to output differential when the output voltage drops to 99% of its nominal valu e with v out + 1v applied to v in . note 4: vin = v out (nominal) +1v. for example, use v in = 4.3v for a 3.3v regulator. employ pulse-testing procedures to minimize temperature rise. note 5: ground pin current is the regulator quiescent current. the total current drawn from the source is the sum of the load current to the ground current. note 6: output voltage temperature coefficient is defined as the worst case voltage changed divided by the total temperature ra nge. note 7: thermal regulation is defined as the change in the output voltage at a time t after a change in power dissipation is ap plied, excluding load or line regulation effects. specifications are for a 200ma load pulse as v in = 20v (a 4w pulse) for t = 10ms. note 8: vref v out (v in - 1), 2.3v v in 16v, 10ma < i l i fl , t j t jmax note 9: comparator threshold is expressed in terms of a voltage differential at the adjust terminal below the nominal referenc e voltage measured 6v input. to express these thresholds in terms of output voltage change, multiply the error amplifier gain = v out /v ref = (r1 + r2)/r2. for example, at a programmable output voltage of 5v, the error output is guaranteed to go low when the output drops by 95mvx 5v/ 1.240v = 38mv. threshold remains constant as a percent of v out as v out is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. note 10: v en 0.8v and v in 16v, v out = 0. block diagram reference thermal shutdown en in out adj gnd o.v i limit 28v r1* r2* 1.180v 1.240v + + -- flag
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com b29150 application hints the bay linear b29150/51/52/53 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltage. however, the use of an output capacitor is required in order to insure the stability and the performances. thermal consideration although the b29150/51/52/53 offers limiting circuitry for overload conditions, it is necessary not to exceed the maximum junction temperature, and therefore to be careful about thermal resistance. the heat flow will follow the lowest resistance path, which is the junction- to-case thermal resistance. in order to insure the best thermal flow of the component, a proper mounting is required. note that the case of the device is electrically connected to the output. the case has to be electrically isolated, a thermally conductive sp acer can be used. however do not forget to consider its contribution to thermal resistance. assuming: v in = 10v, v out = 5v, i out = 1.5a, t a = 90 c, case = 1 c/w (no external heat sink, no wind) power dissipation under these conditions p d = (v in ? v out ) * i out = 7.5w junction temperature t j = t a + p d * ( case + jc ) for the control section t j = 90 c + 7.5w*(1 c/w + 0.6 c/w) = 102 c 114 c < t junction max for the control section. for the power section t j = 90 c + 7.5w*(1 c/w + 1.6 c/w) = 104.5 c 109.5 c < t junction max for the power transistor. in both case reliable operation is insured by adequate junction temperature. capacitor requirements the output capacitor is needed for stability and to minimize the output noise. the required value of the capacitor varies with the load. however, a minimum value of 10 f aluminum will guarantee stability over load. a tantalum capacitor is recommended for a fast load transient response. if the power source has high ac impedance, a 0.1 f capacitor between input & ground is recommended. this capacitor should have good characteristics up to 250 khz. minimum load current to ensure a proper behavior of the regulator at light load, a minimum load of 5ma for b29150/51/52/53 is required. adjustable regulator design b29152/53 are adjustable regulators and maybe programmed for any value between 1.25v and 16v using two resistors. the relation between the resistors is given by: r 1 =r 2 (v out /1.240 ?1) resistors have a large value up to 1m ? in order to reduce the current consumption. this might be interesting in the case of widely varying load currents. error flag b29152/53 features an error indicating either an over current fault or a low input voltage. this flag pulls low when such a problem occurs and may sink 10ma. it is inoperative during thermal shutdown. enable input b29152/53 features enable input allowing turning on & off the device. en has been designed to be compatible with ttl/cmos logic. when the regulator is on, the current flowing through this pin is approximately 20 a. bay b29150 fig.1 basic fixed output regulator v ou t v in 4 5 3 2 1 bay b29152 v out v in r 1 r 2 fig. 2 adjustable output voltage regulator v out = v ref x [1 + (r 1 / r 2 )] for best results, the total series resistance should be small enough to pass the minimum regulator load current
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com b29150 advance information - these data sheets contain descriptions of products that are in development. the specifications are based on the engineering ca lculations, computer simulations and/ or initial prototype evaluation. preliminary information - these data sheets contain minimum and maximum specifications that are based on the initial device characterizations. these lim its are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. the application circuit examples are only to explain the representative applications of the devices and are not intended to gua rantee any circuit design or permit any industrial property right to other rights to execute. bay linear takes no responsibility for any problems related to any indust rial property right resulting from the use of the contents shown in the data book. typical parameters can and do vary in different applications. customer?s technical experts must validate all operating parameters including ? typical? for each customer application. life support and nuclear policy bay linear products are not authorized for and should not be used within life support systems which are intended for surgical i mplants into the body to support or sustain life, in aircraft, sp ace equipment, submarine, or nuclear facility applications wit hout the specific written consent of bay linear president.
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