unisonic technologies co., ltd lr4xxyy preliminary cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2013 unisonic technologies co., ltd qw-r502-a39.a dual low-noise 200ma ldo regulator ? description the utc lr4xxyy are dual voltage regulator ics that have high output voltage accuracy, low dropout, low supply current, and high ripple rejection. every channel of utc lr4xxyy series consists of a voltage referenc e unit and over temperature protection, simultaneity; also consists of an error amplifier, a current limit circuit, resistors fo r setting output voltage, and a chip enable circuit, respectively. the en1 and en2 pins control each output respectively, when both outputs shutdown simultaneously, the chip will be turn off and consumes nearly zero operation current which is suitable for battery-power devices. the load transient response and li ne transient response of the utc lr4xxyy series are excellent, so these ics are suitable for hand-held communication equipment power supply. ? features * 200ma guaranteed output current(each ldo) * dual shutdown pins control each output * 120mv dropout at 100ma load * current limiting protection * thermal shutdown protection * excellent line/load transient * rohs compliant and 100% lead (pb)-free sot-26 4 5 3 2 1 6 ? ordering information ordering number package packing lead free halogen free lr4xxyyl-ag6-r lr4xxyyg-ag6-r sc59-6 tape reel note: xxyy: output voltage, refer to marki ng information.
lr4xxyy preliminary cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-a39.a ? marking informations package code voltage code marking xx yy sot-26 a 28: 2.8v 28: 2.8v b 30: 3.0v 30: 3.0v c 12: 1.2v 18: 1.8v d 18: 1.8v 28: 2.8v e 18: 1.8v 33: 3.3v f 33: 3.3v 18: 1.8v ? pin configurations ? pin description pin no. pin name description 1 v out2 channel 2?s voltage output 2 gnd ground 3 en2 channel 2?s output enable control pin 4 en1 channel 1?s output enable control pin 5 v in voltage input pin 6 v out1 channel 1?s voltage output
lr4xxyy preliminary cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-a39.a ? block diagram 4 5 3 2 current limit current limit 1 r2-1 r1-1 r2-2 r1-2 v ref 6 v ref v out1 gnd v out2 en2 v in en1
lr4xxyy preliminary cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-a39.a ? absolute maximum ratings (note 1) parameter symbol ratings unit supply input voltage(operating) v in 2.5 ~ 5.5 v supply input voltage(survival) -0.3 ~ +6.5 enable input voltage v en 0 ~ 5.5 v lead temperature (soldering, 10 sec.) +260 c esd rating (note 2) 2 kv junction temperature t j -40 ~ +125 c storage temperature range t stg -65 ~ +150 c operation temperature range t opr -40 ~ +85 c ? electrical characteristics (v in = v out +0.5v or 2.5v, c in = c out = 2.2 f, en1=en2=v in , t a = 25c, for each ldo unless otherwise specified) notes 1. limits beyond which damage to the device may o ccur is indicated by absolute maximum ratings. conditions for which the device is intended to be func tional is indicated by operating ratings, but specific performance` limits isn?t be guaranteed. only for the test conditions listed the guaranteed specifications can be applied. when the device is not operated under the listed te st conditions some performance characteristics may degrade. 2. which discharged through a 1.5k ? resistor into each pin is a 100pf capacitor in the human body model. 3. the dropout voltage is defined as v in -v out , which is measured when v out is v out(normal) ? 100mv. parameter symbol test conditions min typ max unit output voltage accuracy (load regulation) ? v out i out =1ma to 200ma -2 +2 % maximum output current i ma x continous 200 ma current limit i lim r load =1 ? 500 1000 ma quiescent current i g no load 165 260 a i out =100ma(both ldos) 165 260 a dropout voltage(note3) v drop i out 1ma 20 mv i out 100ma 120 mv i out 200ma 255 mv line regulation ? v line v in =(vout+0.5v or 2.5v) to 5.5v i out =1ma -0.2 +0.2 %/v en input high threshold v ih v in 2.5v to 5.5v 1.6 v en input low threshold v il v in 2.5v to 5.5v 0.4 v en input bias current i sd en=gnd or v in 100 na shutdown supply current i gsd en1 en2 gnd 0.01 2 a thermal shutdown temperature t sd 140 c thermal shutdown hysteresis ? t sd 10 c output voltage noise e no 10~100khz c out =4.7 f i load =1ma 124 v rms output voltage ac psrr psrr 100hz c out 4.7 f i load 100ma 62 db
lr4xxyy preliminary cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-a39.a ? test circuits fig.1 standard test circuit en2 v in en1 v out1 gnd c1 2.2 f c2 2.2 f c3 2.2 f v out2 a i ss fig.2 supply current test circuit
lr4xxyy preliminary cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-a39.a ? test circuits(cont.) en2 v in en1 v out1 gnd c2 2.2 f c3 2.2 f v out2 i out1 i out2 pg pulse generator fig.3 ripple rejection, line tr ansient response test circuit fig.4 load transient response test circuit
lr4xxyy preliminary cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-a39.a ? typical application circuit 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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