unisonic technologies co., ltd lr3xxyyb preliminary cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2012 unisonic technologies co., ltd qw-r125-002.db 150ma 2ch ldo regulator ? description the utc lr3xxyyb are cmos voltage regulator ics that have high output voltage accuracy, low dropout, low supply current, and high ripple rejection. ever y voltage regulator ic of utc lr3xxyyb series consists of an error amplifier, a voltage reference unit, a current limit circuit, resist ors for setting output voltage, and a chip enable circuit. due to built-in transistor with low on resistance and a chip enable function these ics perform with low dropout voltage prolongs the battery life of each system. the load transient response and line transient response of the utc lr3xxyyb series are excellent, so these ics are suitable for hand-held communication equipment power supply. ? features * low supply current: typ. 60a * standby mode: typ. 0.1a * low dropout voltage * high ripple rejection * low temperature-drift coefficient of output voltage * excellent line regulation * high output voltage accuracy * output voltage stepwise setting with a step of 0.1v in the range of 1.5v ~ 3.3v is possible * built-in fold-back protection circuit typ. 40ma (current at short mode) * ceramic capacitor is recommended. (1.0f or more) sot-26 4 5 3 2 1 6 ? ordering information ordering number package packing lead free halogen free lr3xxyybl-ag6-r LR3XXYYBG-AG6-R sot-26 tape reel note: xxyy: output voltage, refer to marki ng information.
lr3xxyyb preliminary cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r125-002.db ? marking informations package voltage code marking xx yy sot-26 15:1.5v 30:3.0v 15:1.5v 28:2.8v 15:1.5v 33:3.3v 18:1.8v 33:3.3v 18:1.8v 2 8 : 2 . 8 v 18:1.8v 3 0 : 3 . 0 v 28:2.8v 1 2 : 1 . 2 v 28:2.8v 1 5 : 1 . 5 v 28:2.8v 1 8 : 1 . 8 v 28:2.8v 3 3 : 3 . 3 v 33:3.3v 1 5 : 1 . 5 v 33:3.3v 1 8 : 1 . 8 v 33:3.3v 2 8 : 2 . 8 v 33:3.3v 3 3 : 3 . 3 v ? pin configurations ? pin description pin no. pin name description 1 en1 channel 1?s output enable control pin 2 v in voltage input pin 3 en2 channel 2?s output enable control pin 4 v out2 channel 2?s voltage output 5 gnd ground 6 v out1 channel 1?s voltage output
lr3xxyyb preliminary cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r125-002.db ? block diagram 1 2 3 5 current limit current limit 4 r2-1 r1-1 r2-2 r1-2 v ref 6 v ref v out1 gnd v out2 en2 v in en1
lr3xxyyb preliminary cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r125-002.db ? absolute maximum ratings parameter symbol ratings unit input voltage v in 6.5 v input voltage (en) v en 6.5 v output voltage v out -0.3 ~ v in + 0.3 v output current i out1+ i out2 700 ma power dissipation p d 420 mw operating temperature t opr -40 ~ +85 c storage temperature t stg -55 ~ +125 c note: absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? thermal data parameter symbol rating unit junction to ambient ja 250 c/w ? electrical characteristics parameter symbol test conditions min typ max unit output voltage v out v in =set v out +1v, 1ma i out 30ma v out 0.98 v out 1.02 v output current i out v in ? v out =1.0v 150 ma load regulation ? v load v in =set v out +1v, 1ma i out 150ma 15 40 mv line regulation ? v line set v out +0.5v v in 6.0v, i out =30ma 0.02 0.10 %/v dropout voltage v d refer to the electrical char acteristics by output voltage supply current i ss v in =set v out +1v (both ldos) 60 90 a supply current (standby) i stn-by v in =set v out +1v v ce =gnd 0.1 1.0 a power supply ripple rejection psrr ripple 0.5vp ? p, v in =set v out +1v i out =30ma (in case that v out 1.7v, v in =set v out +1.2v) 75 (note1) 65 (note2) db input voltage v in 2.0 6.0 v output voltage temperature coefficient opr out t v i out =30ma, -40c t opr 85c 100 ppm /c short current limit i sc ( limit ) v out =0v 40 ma pull-down resistance for ce pin r pd 0.7 2.0 8.0 m ? ce input voltage ?h? v ceh 1.5 6.0 v ce input voltage ?l? v cel 0.0 0.3 v output noise en bw=10hz ~100khz 30 vrms low output nch tr. on resistance (of b version) r low v ce =0v 60 ? notes: 1. f=1khz, 70db as to v out 2.5v output type. 2. f=10khz, 60db as to v out 2.5v output type. ? electrical characteristics by output voltage output voltage v out (v) dropout voltage, v d (v) condition typ max v out =1.5 i out =150ma 0.38 0.70 v out =1.6 0.35 0.65 v out =1.7 0.33 0.60 1.8 v out 2.0 0.32 0.55 2.1 v out 2.7 0.28 0.50 2.8 v out 3.3 0.22 0.35
lr3xxyyb preliminary cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r125-002.db ? test circuits utc lr3xxyyb en2 v in en1 v out1 gnd c 1 1 f c2 1 f c3 1 f v out2 v v v out1 i out1 v out2 i out2 fig.1 standard test circuit fig.2 supply current test circuit
lr3xxyyb preliminary cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r125-002.db ? test circuits(cont.) fig.3 ripple rejection, line tr ansient response test circuit fig.4 load transient response test circuit
lr3xxyyb preliminary cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r125-002.db ? typical application circuit utc lr3xxyyb en2 v in en1 v out1 gnd c 1 1 f in c 2 1 f out1 c 3 1 f out2 v out2 utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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