View HT78B25_4401479.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

rev. 1.00 1 august 25, 2011 rev. 0.00 pb august 25, 2011 ht78bxx high psrr 500ma ldo regulator features ? output voltage: 1.5v/1.8v/2.5v/2.8v/ 3.0v/3.3v/5v ? high output voltage accuracy: 2% ? HT78B25 low voltage drop: 0.64v (typ.) (v out =2.5v @ i out =500ma) ? maximum input voltage: 7.0v ? guaranteed output current: 500ma ? low power consumption: 18a (typ.) ? high ripple rejection: 70db (1khz@i out =30ma) ? power-saving shutdown mode ? over temperature protection ? current limiting ? sot-23-5, sot223, sot89 package applications ? portable communication equipment ? portable music player ? electrical appliances such as cameras, vcrs and camcorders ? battery-powered equipment general description the ht78bxx series are cmos-based voltage regulator ics with high output voltage accuracy, low quiescent current, low on resistance, and high ripple rejection. each of these ics consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit, a chip enable circuit, and so on. the ht78bxxs current limiters' fold back circuit also operates as a short circuit protect function for the output current limiter. these ics perform with low dropout voltage and the chip-enable function. the quiescent current of this ic is only 18a, and the line transient response and the load transient response of ht78bxx are excellent, thus these ics are very suitable for the power supply for hand-held communication equipment. the space-saving sot23-5, sot223 and sot89 package will be an attractive additional feature for pocket and hand-held applications. selection table part no. output voltage tolerance package ht78b15 1.5v 2% sot23-5 sot223 sot89 ht78b18 1.8v HT78B25 2.5v ht78b28 2.8v ht78b30 3.0v ht78b33 3.3v ht78b50 5.0v
rev. 1.00 2 august 25, 2011 ht78bxx block diagram gnd v out v ref short current shutdown v in ce absolute maximum ratings (note 1) maximum input supply voltage...........................................................................................................................7.5v ambient temperature range .................................................................................................................. -40c~+85c thermal information symbol parameter package max. unit ja thermal resistance (junction to ambient) (assume no ambient airfow, no heat sink) sot23-5 500 c/w sot223 134 c/w sot89 200 c/w p d power dissipation sot23-5 0.20 w sot223 0.75 w sot89 0.50 w note: p d is measured at ta= 25 c
rev. 1.00 3 august 25, 2011 ht78bxx pin assignment pin descriptions sot23-5 pin descriptions pin no. symbol description 1 vin input pin 2 gnd ground pin 3 ce chip enable pin, high enable 4 nc no connection 5 vout output pin sot223 pin descriptions pin no. symbol description 1 gnd ground pin 2 vin input pin 3 vout output pin sot89 pin descriptions pin no. symbol description 1 gnd ground pin 2 vin input pin 3 vout output pin
rev. 1.00 4 august 25, 2011 ht78bxx electrical characteristics ta=25c, v in =v out +1v, i out =30ma, unless otherwise specifed(note 2) symbol parameter test conditions min. typ. max. unit v in input voltage 1.5vv out 5.0v 2.5 7 v ?v out output voltage tolerance 1ma i out 30ma -2 +2 % ?v line line regulation v out +0.5vv in 7v, i out =10ma 0.02 0.1 %/v ?v load load regulation(note 3) 1ma i out 500ma 1.5vv out 1.8v 28 55 mv 2.5vv out 3.0v 33 66 v out 3.3v 35 80 v drop dropout voltage(note 4) ?v out = 2%, i out =500ma 1.5vv out 1.8v 1 1.3 v 2.5vv out 5.0v 0.64 0.94 i short short current limit v out =0v 90 ma i ss supply current i out =0ma 18 30 a i sd shutdown current ce=gnd 0.1 1 a v ih ce input high threshold v out +1vv in 7v 1 7 v v il ce input low threshold v out +1vv in 7v 0 0.3 v rr ripple rejection i out = 3 0ma f=1khz 70 db f=10khz 53 v noise output noise bandwidth=10hz to 100khz 30 vrms t c temperature coeffcient t c = out a out v tv ? ?? , i out =30ma, -40cta85c 100 ppm/c t sd thermal shutdown temperature 150 c note: 1. 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. 2. specifications are production tested at t a =room temperature. specifications over the -40c to 85c operating temperature range are assured by design, characterization and correlation with statistical quality controls (sqc). 3. load regulation is measured at constant junction temperature, using pulse testing with a short on time. 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) Ct a )/ ja . 4. dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a specifed output current. in dropout, the output voltage will be equal to: v in Cv drop .
rev. 1.00 5 august 25, 2011 ht78bxx application circuit c out 1uf v in v out gnd gnd c in 1uf gnd v out v in ht78bxx series c out 1uf v in v out gnd gnd c in 1uf gnd v out v in ht78bxx series ce
rev. 1.00 6 august 25, 2011 ht78bxx typical characteristics supply current vs. input current output voltage vs. input voltage output voltage vs. temperature ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 9 typical characteristics 1. supply current vs. input current ht78b15 input voltage (v) 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 supply current (ua) 10 11 12 13 14 15 16 17 18 19 20 21 22 ht75b50 input voltage (v) 6.00 6.25 6.50 6.75 7.00 supply current (ua) 10 11 12 13 14 15 16 17 18 19 20 21 22 ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 10 2. output voltage vs. input voltage ht78b15 input voltage (v) 01234567 output voltage (v) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 1ma 150ma ht78b15 input voltage (v) 01234567 output voltage (v) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 1ma 150ma ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 11 ht78b50 input voltage (v) 01234567 output voltage (v) 0 1 2 3 4 5 6 1ma 150ma ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 12 3. output voltage vs. temperature ht78b15 temperature ( o c) -50 -25 0 25 50 75 100 output voltage (v) 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 1.60 i out =30ma HT78B25 temperature ( o c) -50 -25 0 25 50 75 100 output voltage (v) 2.40 2.42 2.44 2.46 2.48 2.50 2.52 2.54 2.56 2.58 2.60 i out =30ma ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 9 typical characteristics 1. supply current vs. input current ht78b15 input voltage (v) 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 supply current (ua) 10 11 12 13 14 15 16 17 18 19 20 21 22 ht78b50 input voltage (v) 6.00 6.25 6.50 6.75 7.00 supply current (ua) 10 11 12 13 14 15 16 17 18 19 20 21 22
rev. 1.00 7 august 25, 2011 ht78bxx ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 16 5. dropout voltage vs. output current ht78b15 output current(ma) 0 100 200 300 400 500 dropout voltage (v) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 85 o c 25 o c -40 o c HT78B25 output current(ma) 0 100 200 300 400 500 dropout voltage (v) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 85 o c 25 o c -40 o c supply current vs. temperature dropout voltage vs. output current ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 13 ht78b50 temperature ( o c) -50 -25 0 25 50 75 100 output voltage (v) 4.90 4.92 4.94 4.96 4.98 5.00 5.02 5.04 5.06 5.08 5.10 i out =30ma ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 14 4. supply current vs. temperature ht78b15 temperature ( o c) -50 -25 0 25 50 75 100 supply current (ua) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 v in =2.5v HT78B25 temperature ( o c) -50 -25 0 25 50 75 100 supply current (ua) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 v in =3.5v ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 15 ht78b50 temperature ( o c) -50 -25 0 25 50 75 100 supply current (ua) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 v in =6.0v
rev. 1.00 8 august 25, 2011 ht78bxx ??a doc. no. e rev. ?a page Y????w?????a?S??????Y???}?}uD??? the information contained herein is the exclusive property of holtek and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of holtek. 17 ht78b50 output current(ma) 0 50 100 150 200 250 300 350 400 450 500 dropout voltage (v) 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 85 o c 25 o c -40 o c ripple rejection vs. frequency ht78b15 v out =1.5v, v in =2.5v (i out =30, 80, 200ma) input transient response ht78b15 c in =0f, c out =1f, ch1=v out(ac) , ch2=v in HT78B25 c in =0f, c out =1f, ch1=v out(ac) , ch2=v in ht78b50 c in =0f, c out =1f, ch1=v out(ac) , ch2=v in load transient response ht78b15 v in =2.5v, c in =c out =1f, ch1=v out(ac) , ch2=i out
rev. 1.00 9 august 25, 2011 ht78bxx HT78B25 v in =3.5v, c in =c out =1f, ch1=v out(ac) , ch2=i out ht78b50 v in =6.0v, c in =c out =1f, ch1=v out(ac) , ch2=i out turn-on/off speed with ce pin ht78b50 i out =150ma, v in =6.0v, c in =c out =1f, ch1=v ce , ch2=v out ht78b50 i out =150ma, v in =6.0v, c in =c out =1f, ch1=v ce , ch2=v out
rev. 1.00 10 august 25, 2011 ht78bxx package information 5-pin sot23-5 outline dimensions symbol dimensions in inch min. nom. max. a 0.039 D 0.051 a1 D D 0.004 a2 0.028 D 0.035 b 0.014 D 0.020 c 0.004 D 0.010 d 0.106 D 0.122 e 0.055 D 0.071 e D 0.075 D h 0.102 D 0.118 l 0.015 D D 0 D 9 symbol dimensions in mm min. nom. max. a 1.00 D 1.30 a1 D D 0.10 a2 0.70 D 0.90 b 0.35 D 0.50 c 0.10 D 0.25 d 2.70 D 3.10 e 1.40 D 1.80 e D 1.90 D h 2.60 D 3.0 l 0.37 D D 0 D 9
rev. 1.00 11 august 25, 2011 ht78bxx 3-pin sot223 outline dimensions symbol dimensions in inch min. nom. max. a D D 1.8 a1 0.02 D 0.1 a2 1.5 D 1.7 b 0.66 D 0.84 c 0.23 D 0.35 d 6.3 D 6.7 e 6.7 D 7.3 e1 3.3 D 3.7 e D 2.3 D e1 D 4.6 D l 0.75 D D 0 D 10
rev. 1.00 12 august 25, 2011 ht78bxx 3-pin sot89 outline dimensions symbol dimensions in inch min. nom. max. a 0.173 D 0.181 b 0.059 D 0.072 c 0.090 D 0.102 d 0.035 D 0.047 e 0.155 D 0.167 f 0.014 D 0.019 g 0.017 D 0.022 h D 0.059 D i 55 D 63 j 14 D 17 symbol dimensions in mm min. nom. max. a 4.39 D 4.60 b 1.50 D 1.83 c 2.29 D 2.59 d 0.89 D 1.19 e 3.94 D 4.24 f 0.36 D 0.48 g 0.43 D 0.56 h D 1.50 D i 1.40 D 1.60 j 0.36 D 0.43
rev. 1.00 13 august 25, 2011 ht78bxx reel dimensions sot23-5 symbol description dimensions in mm a reel outer diameter 178.01.0 b reel inner diameter 62.01.0 c spindle hole diameter 13.00.2 d key slit width 2.500.25 t1 space between flang 8.4 +1.5/-0.0 t2 reel thickness 11.4 +1.5/-0.0 sot223 symbol description dimensions in mm a reel outer diameter 3301 b reel inner diameter 621.5 c spindle hole diameter 12.750.15 d key slit width 2+0.6 t1 space between flang 12.4+0.2 t2 reel thickness 16.4?0.4 sot89-3 symbol description dimensions in mm a reel outer diameter 180.01.0 b reel inner diameter 62.01.5 c spindle hole diameter 12.75 +0.15/-0.00 d key slit width 1.90.15 t1 space between flang 12.4 +0.2/-0.0 t2 reel thickness 17.0 +0.0/-0.4
rev. 1.00 14 august 25, 2011 ht78bxx carrier tape dimensions
sot23-5 symbol description dimensions in mm w carrier tape width 8.00.3 p cavity pitch 4.00.1 e perforation position 1.750.10 f cavity to perforation(width direction) 3.500.05 d perforation diameter 1.5 +0.1/-0.0 d1 cavity hole diameter 1.5 +0.1/-0.0 p0 perforation pitch 4.00.1 p1 cavity to perforation(length direction) 2.000.05 a0 cavity length 3.150.10 b0 cavity width 3.20.1 k0 cavity depth 1.40.1 t carrier tape thickness 0.200.03 c cover tape width 5.30.1 sot223 symbol description dimensions in mm w carrier tape width 120.3 p cavity pitch 80.1 e perforation position 1.750.1 f cavity to perforation (width direction) 5.50.05 d perforation diameter 1.5+0.1 d1 cavity hole diameter 1.5+0.1 p0 perforation pitch 40.1 p1 cavity to perforation (length direction) 20.05 a0 cavity length 6.90.1 b0 cavity width 7.50.1 k0 cavity depth 2.10.1 t carrier tape thickness 0.30.05 c cover tape width 9.3
rev. 1.00 15 august 25, 2011 ht78bxx sot89-3 symbol description dimensions in mm w carrier tape width 12.0 +0.3/-0.1 p cavity pitch 8.00.1 e perforation position 1.750.10 f cavity to perforation(width direction) 5.500.05 d perforation diameter 1.5+0.1 d1 cavity hole diameter 1.5+0.1 p0 perforation pitch 4.00.1 p1 cavity to perforation(length direction) 2.00.1 a0 cavity length 4.80.1 b0 cavity width 4.50.1 k0 cavity depth 1.80.1 t carrier tape thickness 0.3000.013 c cover tape width 9.30.1
rev. 1.00 16 august 25, 2011 ht78bxx holtek semiconductor inc. (headquarters) no.3, creation rd. ii, science park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek semiconductor inc. (taipei sales offce) 4f-2, no. 3-2, yuanqu st., nankang software park, taipei 115, taiwan tel: 886-2-2655-7070 fax: 886-2-2655-7373 fax: 886-2-2655-7383 (international sales hotline) holtek semiconductor inc. (shenzhen sales offce) 5f, unit a, productivity building, no.5 gaoxin m 2nd road, nanshan district, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9722 holtek semiconductor (usa), inc. (north america sales offce) 46729 fremont blvd., fremont, ca 94538, usa tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holtek.com copyright ? 2011 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 specifications 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 modifcation, 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 .

▲Up To Search▲

Price & Availability of HT78B25

	To Download HT78B25 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .