unisonic technologies co., ltd lr9107 preliminary cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2016 unisonic technologies co., ltd qw-r102-080 .a output capacitor-less low voltage 200ma ldo regulator ? description the utc lr9107 is a cmos-based low dropout regulator with high output voltage accuracy, low dropout, high psrr and low quiescent current. the utc lr9107 includes a voltage reference unit, an error amplifier, current limit circuit, re sistors for setting output voltage, and a chip enable circuit. with its low power consumption, excellent line and load transient response, the utc lr9107 is well suited for low power handheld communication equipment. since the output capacitor and noise bypass capacitor are able to be reduced, high density mounting on boards are possible. ? features * quiescent current: typ. 9.5a * low v in and wide v in range: 1.4v~5.25v * guarantee output current: 200ma * vout accuracy: 1% * ripple rejection: typ. 70db (f=1khz,v out 1.2v) typ. 65db (f=1khz, 1.2v lr9107 preliminary cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r102-080 .a ? marking package voltage code marking sot-25 18: 1.8v 28: 2.8v ? pin configuration 123 54 v in gnd ce v out nc ? pin description pin no. pin name description 1 v in power input pin 2 gnd ground 3 ce enable pin. this pin should not be floating. driving this pin ?1? enables the regulator, while ?0? shutdown the regulator. 4 nc no connection 5 v out power output pin ? block diagram + - v in v out gnd ce vref current limit utc lr9107b (non discharge) + - vref current limit v in ce v out gnd utc lr9107d (with discharge)
lr9107 preliminary cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r102-080 .a ? absolute maximum ratings (t a =25c, unless otherwise specified.) parameter symbol ratings unit input voltage v in 6.0 v input voltage ce v ce 6.0 v output voltage v out -0.3 ~ v in +0.3 v output current i out 300 ma power dissipation p d 380 mw operating temperature t a -40 ~ +85 c storage temperature t stg -55 ~ +125 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating conditions (t a =25c, unless otherwise specified.) parameter symbol ratings unit input voltage v in 1.7 ~ 5.25 v output current i out 0 ~ 150 ma operating ambient temperature t a -40 ~ +85 c ? electrical characteristics (v ce =v in =v out +1.0v, c in =c out 0.47f, i out =1.0ma, t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit input voltage v in t a =-40c~+85c 5.25 v t a =+25c -1 +1 output voltage accuracy (note 6) v oc v in =(v out-nom +1.0v)~5.25v, i out =1ma~200ma t a =-40c~+85c -1.5 +1.5 % line regulation (dv out /dv in /v out ) ? v out / ? v in v in =(v out-nom +1.0v)~5.25v, i out =1.0ma 0.02 0.1 %/v load regulation (dv out /v out /di out ) ? v out / ? i out v in =v out-nom +1.0v, i out =1ma~200ma 0.5 1.0 %/a quiescent current (note 2) i q i out =0ma 9.5 25 a i standby i standby v ce =0v (disabled) 0.1 3.0 a output current i out 200 ma fold-back short current (note 3) i sc v out short to ground 50 ma ripple rejection (note 4) rr v out 1.2v 1.2v lr9107 preliminary cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r102-080 .a ? test circuits v in v out gnd utc c in c out ce lr9107 test circuit for supply current a i ss v out v in v out gnd utc c out ce lr9107 test circuit for ripple rejection pulse generator i out p.g.
lr9107 preliminary cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r102-080 .a ? test circuits (cont.) v in v out gnd utc c1 c out ce lr9107 test circuit for load transient response i outa i outb v out ? 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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