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rev. 1.30 1 may 02, 2014 rev. 1.00 pb may 02, 2014 HT72XX series 300ma tinypower tm ldo features ? output voltage ranges: fixed range of 1.8v, 2.5v, 2.7v, 3.0v, 3.3v, 4.5v, 5.0v type. ? highly accuracy: 2% ? low voltage drop: 240mv (typ.), v out =5.0v at 300ma ? maximum input voltage: 8v ? guaranteed output current: 300ma ? low quiescent current: 4 m a (typ.) ? current limiting ? over-temperature shutdown ? sot23, sot23-5 and sot89 packages applications ? portable electronics ? wireless devices ? cordless phones ? pc peripherals ? battery powered devices ? electronic scales general description the HT72XX series of positive, linear regulators features low quiescent current (4 m a typ.) with low dropout voltage, making them ideal for battery applications. the space-saving sot23 package is attractive for pocket and hand held applications. the devices are capable of supplying 300ma of output current continuously. they are available with several fxed output voltages ranging from 1.8v to 5.0v. although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain variable voltages and currents. these rugged devices have thermal shutdown and current limiting to prevent device failure under the worst of operating conditions. selection table part no. output voltage tolerance package marking ht7218 1.8v 2% sot23 sot23-5 sot89 72xx (for sot23) 72xx (for sot23-5) HT72XX (for sot89) ht7225 2.5v ht7227 2.7v ht7230 3.0v ht7233 3.3v ht7245 4.5v ht7250 5.0v note: xx stands for output voltages.
rev. 1.30 2 may 02, 2014 HT72XX block diagram

pin assignment pin description pin no. pin name description sot23 sot23-5 sot89 3 ce chip enable pin, high enable 2 5 3 vout output pin 3 1 2 vin input pin 1 2 1 gnd ground pin 4 nc no connection
rev. 1.30 3 may 02, 2014 HT72XX absolute maximum ratings* maximum supply voltage .......................... up to 8.5v operating temperature ......................... ?40c to 85c storage temperature ........................... ?50c to 125c note: these are stress ratings only. stresses exceeding the range specifed under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specifcation is not implied and prolonged exposure to extreme conditions may affect device reliability. * absolute maximum ratings indicate limits beyond which damage to the device may occur. operating ratings indicate conditions for which the device is intended to be functional, but do not guarantee specifc performance limits. the guaranteed specifcations apply only for the test conditions listed. thermal information symbol parameter package max. unit ja thermal resistance (junction to ambient) (assume no ambient airfow, no heat sink) sot23 667 c/w sot23-5 500 c/w sot89 200 c/w p d power dissipation sot23 0.15 w sot23-5 0.20 w sot89 0.50 w note: p d is measured at ta= 25c electrical characteristics t j=25 c, v in =v out +1.0v, i o =1ma, unless otherwise specifed symbol parameter test conditions min. typ. max. unit v in input voltage 8 v ?v out output voltage tolerance ?2 2 % i ss quiescent current i o =0ma, v ce =v in 4 7 a ?v load load regulation (note1) 1ma i out 300ma 0.004 0.008 %/ma v drop dropout voltage (note2) ?v out =2% i out =300ma v o 1.8v 800 1200 mv 2.5v v o 2.7v 350 400 3.0v v o 5.0v 240 300 ?v line line regulation v out +1.0vv in 8.0v 0.2 0.3 %/v i lim current limit (note3) ?v out =10% 300 ma v ih ce input high threshold v out + 1v v in 8v 2 v v il ce input low threshold v out + 1v v in 8v 0.8 v i sd shutdown current ce input voltage 0.8v 0.5 1.0 a ?v out ?t a temperature coeffcient ?40c < ta < 85c 0.8 mv/c note: 1. load regulation is measured at a constant junction temperature, using pulse testing with a low on time and is guaranteed up to the maximum power dissipation. power dissipation is determined by the input/output differential voltage and the output current. guaranteed maximum power dissipation will not be available over the full input/output range. the maximum allowable power dissipation at any ambient temperature is p d = (t j(max) ? ta) / ja . 2. dropout voltage is defned as the input voltage minus the output voltage that produces a 2% change in the output voltage from the value at v in = v out +1v with a fxed load. 3. current limit is measured by pulsing for a short time.
rev. 1.30 4 may 02, 2014 HT72XX application circuit the circuits provided in this section are for reference only. for the purposes of clarity some of the detailed components pramaters shall depend on the application. basic circuits

typical application circuits high output current positive voltage regulator

? ? ? r2 r1
rev. 1.30 5 may 02, 2014 HT72XX increased output voltage circuit

v out = v xx (1 + ) + i ss r2 dual supply circuit

v out1 = v xx2 + v xx1 v out2 = v xx2 tracking voltage regulator
-v o = v out r2 r1 r b r a
rev. 1.30 6 may 02, 2014 HT72XX package information note that the package information provided here is for consultation purposes only. as this information may be updated at regular intervals users are reminded to consult the holtek website for the latest version of the package information. additional supplementary information with regard to packaging is listed below. click on the relevant section to be transferred to the relevant website page. ? further package information (include outline dimensions, product tape and reel specifcations) ? packing meterials information ? carton information
rev. 1.30 7 may 02, 2014 HT72XX 3-pin sot23-3 outline dimensions symbol dimensions in inch min. nom. max. a 0.057 a1 0.006 a2 0.035 0.045 0.051 b 0.012 0.020 c 0.003 0.009 d 0.114 bsc e 0.063 bsc e 0.037 bsc e1 0.075 bsc h 0.110 bsc l1 0.024 bsc 0 8 symbol dimensions in mm min. nom. max. a 1.45 a1 0.15 a2 0.90 1.15 1.30 b 0.30 0.50 c 0.08 0.22 d 2.90 bsc e 1.60 bsc e 0.95 bsc e1 1.90 bsc h 2.80 bsc l1 0.60 bsc 0 8
rev. 1.30 8 may 02, 2014 HT72XX 5-pin sot23-5 outline dimensions symbol dimensions in inch min. nom. max. a 0.030 0.031 a1 0.000 0.002 a2 0.028 0.030 0.031 b 0.014 0.020 c 0.004 0.008 d 0.114 bsc e 0.110 bsc e1 0.063 bsc e 0.037 bsc e1 0.075 bsc l 0.015 0.018 0.024 l1 0.024 bsc 0 8 symbol dimensions in mm min. nom. max. a 0.75 0.80 a1 0.00 0.05 a2 0.70 0.75 0.78 b 0.35 0.50 c 0.10 0.20 d 2.90 bsc e 2.80 bsc e1 1.60 bsc e 0.95 bsc e1 1.90 bsc l 0.37 0.45 0.60 l1 0.60 bsc 0 8
rev. 1.30 9 may 02, 2014 HT72XX 3-pin sot89 outline dimensions symbol dimensions in inch min. nom. max. a 0.173 0.181 b 0.053 0.072 c 0.090 0.102 d 0.035 0.047 e 0.155 0.167 f 0.014 0.019 g 0.017 0.022 h 0.059 bsc i 0.055 0.063 j 0.014 0.017 symbol dimensions in mm min. nom. max. a 4.40 4.60 b 1.35 1.83 c 2.29 2.60 d 0.89 1.20 e 3.94 4.25 f 0.36 0.48 g 0.44 0.56 h 1.50 bsc i 1.40 1.60 j 0.35 0.44
rev. 1.30 10 may 02, 2014 HT72XX copyright ? 2014 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek assumes no responsibility arising from the use of the specifcations described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek's products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notifcation. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

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