mic29302a 3a fast - response ldo regulator super ?eta pnp is a registered trademark of micrel, inc. micre l inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 (408) 944 - 0800 ? fax + 1 (408) 474 - 1000 ? http://www.micrel.com october 3 , 2014 revision 2.0 general description the mic29302a is a high - current, low - cost, low - dropout voltage regulator that uses micrel's proprietary super eta pnp ? process with a pnp pass element . t he 3a ldo regulator features 45 0mv (full load) dropout voltage and very low grou nd current. designed for high - current loads, these devices also find application s in lower current, low - dropout critical systems, where their dropout voltage s and ground current values are important attributes. along with a total accuracy of 2% (over temp erature, line , a nd load regulation) the regulator feature s very fast transient recovery from input voltage surges and output load current changes. the mic29302a has an adjustable output that can be set by two external resistors to a voltage between 1.24v a nd 15v. in addition, the device is fully protected against over current faults, reversed input polarity, reversed lead insertion, and overtemperature operation. a ttl logic enable (en) pin is available in the mic29302a to shutdown the regulator. when not us ed, the device can be set to continuous operation by connecting en to the input (in). the mic29302a is available in the standard and 5 - pin to - 263 and to - 252 packages with an operating junction temperature range of ? 40 c to +125c. data sheets and support do cumentati on can be found on micrel?s web site at: www.micrel.com . features ? high - current capability ? 3a over full temperature range ? low - dropout voltage of 45 0mv at full load ? low ground current ? accurate 1% guaranteed tol erance ? extremely fast transient response ? zero - current shutdown mode ? error flag signals output out - of - regulation ? a djustable output voltage ? packages: to - 263- 5l and to - 252- 5l applications ? processor peripheral and i/o supplies ? high - efficiency ?g reen? computer systems ? automotive electronics ? high - efficiency linear lower supplies ? battery - powered equipment ? pc add - in cards ? high - efficiency p ost - regulator for switching supply ____________________________________________________________________________ ______________ __ _____________________________ typical application ? ? ? ? ? ? + = 1 r2 r1 1.242 v out dropout voltage vs. output current 0 100 200 300 400 500 0.0 0.5 1.0 1.5 2.0 2.5 3.0 output current (a) dropout voltage (mv) v in = 3.3v v adj = 0v t a = 25oc
micrel, inc. mic29302a october 3 , 2014 2 revision 2.0 ordering information part number voltage junction temp erature rang e package mic29302awu adj ustable ? 40c to +125 c 5 - pin to -263 mic29302awd adj ustable ? 40c to +125 c 5 - pin to -252 pin configuration 5 - pin to - 263 (d 2 pak) adjustable voltage (u) mic29302a wu 5 - pin to - 252 (d - pak) adjustable voltage (d) mic29302a wd pin description pin number t o -263 pin number t o -252 pin name p in function 1 1 en enable (input): act ive - high cmos compatible control input. do not float. 2 2 in input: unregulated input, +3 v to +16v maximum 3, tab 3, tab gnd gnd: tab is also connected internally to the ic?s ground on both packages. 4 4 out output: the regulator output voltage 5 5 adj feedback voltage: 1.24v feedback from external resistor divider.
micrel, inc. mic29302a october 3 , 2014 3 revision 2.0 absolute maximum ratings ( 1 ) input supply voltage (v in ) (1) ........................... ? 20v to +20v enable input voltage (v en ) ................................ ? 0.3v to v in lead temperature (soldering, 5 sec.) ........................ 260c power dissipation ..................................... internally limited storage temperature range .................... ? 65c to +150c esd rating all pins (3) operating ratings ( 2 ) o perating junction temperatu re .............. ? 4 0c to +125c operating input voltage ....................................... 3v to 16v package thermal resistance to - 263 ( jc ) ......................................................... 3 c/w to - 252 ( jc ) ......................................................... 3 c/w to - 252 ( ja ) ...................................................... 35 c/w to - 263 ( ja ) ....................................................... 28 c/w electrical characteristics ( 4 ) v in = 4.2v ; i out = 10 0 ma ; t a = 25 c, bold values indicate ? 40 ? & |