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unisonic technologies co., ltd lr1102 cmos ic www.unisonic.com.tw 1 of 12 copyright ? 2015 unisonic technologies co., ltd qw-r502-038. k low noise 150ma ldo regulator ? description the utc lr1102 families are cmos-based voltage regulator ics with extremely low supply current, high output voltage accuracy, high ripple rejection and chip enable circuit. these ics performance are excellent and with sot-25 package, thus these ics are very suitable for hand-held communication equipment. ? features * ultra-low supply current : typ. 35a * standby mode: typ. 0.1a * low dropout voltage: typ. 0.2v (i out = 100ma) * excellent line regulation: typ. 0.05%/v * high ripple rejection: typ. 70db (f = 1khz) ? ordering information ordering number pin assignment halogen free package 1 2 3 4 5 packing lr1102xg-xx-af5-r sot-25 i g c n o tape reel note: pin assignment: i: v dd o: v out g: gnd c: ce/ ce n: no connection
lr1102 cmos ic unisonic technologies co., ltd 2 of 12 www.unisonic.com.tw qw-r502-038. k ? marking information package voltage code marking lr1102a 25:2.5v 27:2.7v 28:2.8v 2j:2.85v 30:3.0v 33:3.3v 35:3.5v 50:5.0v lr1102b 18: 1.8v 25:2.5v 27:2.7v 28:2.8v 2j:2.85v 30:3.0v 33:3.3v 35:3.5v 50:5.0v ? pin description pin no. pin name description 1 v dd input pin 2 gnd ground pin 3 ce/ce chip enable pin 4 nc no connection 5 v out output pin
lr1102 cmos ic unisonic technologies co., ltd 3 of 12 www.unisonic.com.tw qw-r502-038. k ? block diagram 1 5 2 3 gnd v out current limit v ref v dd ce + - lr1102b-xx
lr1102 cmos ic unisonic technologies co., ltd 4 of 12 www.unisonic.com.tw qw-r502-038. k ? absolute maximum ratings parameter symbol ratings unit input voltage v in 9 v input voltage v ce -0.3 ~ v in +0.3 v output voltage v out -0.3 ~ v in +0.3 v output current i out 200 ma power dissipation p d 250 mw junction temperature t j +125 operating temperature t opr -40 ~ +85 storage temperature t stg -55 ~ +125 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. ? electrical characteristics lr1102a-xx (t opr =25 ) parameter symbol test conditions min typ max unit v in =set v out + 1v, 1ma i out 30ma v out x0.98 v out x1.02 v v in =set v out + 1v, 0ma i out 150ma v out x0.97 v out x1.03 v output voltage v out v in =9v, 0ma i out 150ma v out x0.97 v out x1.03 v output current i out refer to the electrical characteristics by output voltage load regulation ? v out / ? i out v in =set v out + 1v, 1ma i out 80ma 12 40 mv dropout voltage v dif refer to the electrical characteristics by output voltage supply current i ss v in =set v out + 1v 35 70 a supply current (standby) i st-by v in =v ce =set v out + 1v 0.1 1.0 a line regulation ? v out / ? v in set v out + 0.5v v in 8v, i out =30ma 0.05 0.20 %/v ripple rejection rr f=1khz, ripple 0.5vp-p, v in =set v out + 1v 70 db input voltage v in 2 8 v output voltage temperature coefficient ? v out / ? t i out = 30ma, -20 t opr 85 100 ppm/ short current limit i limit v out =0v 200 ma ce pull-up resistance r pu 2.5 5.0 10.0 m ? ce input voltage ?h? v ceh 1.5 v in v ce input voltage ?l? v cel 0.00 0.25 v output noise en b w = 10hz ~ 100khz 30 vrms lr1102b-xx (t opr =25 ) parameter symbol test conditions min typ max unit output voltage v out v in =set v out + 1v, 1ma i out 30ma v out x0.98 v out x1.02 v output voltage v out v in =set v out + 1v, 0ma i out 150ma v out x0.97 v out x1.03 v output voltage v out v in =9v, 0ma i out 150ma v out x0.97 v out x1.03 v output current i out refer to the electrical characteristics by output voltage load regulation ? v out / ? i out v in =set v out + 1v, 1ma i out 80ma 12 40 mv dropout voltage v dif refer to the electrical characteristics by output voltage supply current i ss v in =set v out + 1v 35 70 a supply current (standby) i st-by v in = set v out + 1v, v ce =gnd 0.1 1.0 a line regulation ? v out / ? v in set v out + 0.5v v in 8v, i out =30ma 0.05 0.20 %/v ripple rejection rr f=1khz, ripple 0.5vp-p v in =set v out + 1v 70 db
lr1102 cmos ic unisonic technologies co., ltd 5 of 12 www.unisonic.com.tw qw-r502-038. k ? electrical characteristics(cont.) parameter symbol test conditions min typ max unit input voltage v in 2 8 v output voltage temperature coefficient ? v out / ? t i out = 30ma, -20 t opr 85 100 ppm/ short current limit i limit v out =0v 200 ma ce pull-down resistance r pd 2.5 5.0 10.0 m ? ce input voltage ?h? v ceh 1.5 v in v ce input voltage ?l? v cel 0.00 0.25 v output noise en b w = 10hz ~ 100khz 30 vrms ? electrical characteristics by output voltage (t opr =25 ) parameter symbol test conditions min typ max unit output current i out v in -v out = 1.0v 1.8 v out 5.0 150 ma 1.8 v out 2.7 0.18 0.30 v 2.8 v out 3.3 0.18 0.25 v 3.4 v out 5.0 0.15 0.22 v
lr1102 cmos ic unisonic technologies co., ltd 6 of 12 www.unisonic.com.tw qw-r502-038. k ? test circuits 1 v dd 5 v out 2 gnd 3 ce i out out in utc lr1102-xx p.g 1 v dd 5 v out 2 gnd 3 ce out in utc lr1102-xx i1 i2 1f fig.3 ripple rejection, line transient response test circuit fig.4 load transient response test circuit
lr1102 cmos ic unisonic technologies co., ltd 7 of 12 www.unisonic.com.tw qw-r502-038. k ? typical application
lr1102 cmos ic unisonic technologies co., ltd 8 of 12 www.unisonic.com.tw qw-r502-038. k ? typical characteristics 1. output voltage vs. output current o u t p u t v o l t a g e , v o u t ( v ) o u t p u t v o l t a g e , v o u t ( v ) 2. dropout voltage vs. output current
lr1102 cmos ic unisonic technologies co., ltd 9 of 12 www.unisonic.com.tw qw-r502-038. k ? typical characteristics(cont.) 3. output voltage vs. temperature o u t p u t v o l t a g e , v o u t ( v ) o u t p u t v o l t a g e , v o u t ( v ) 5.10 4.98 -50 temperature, t opr ( ) o u t p u t v o l t a g e , v o u t ( v ) 5.00 5.08 5.02 0 50 lr1102-5.0v 4.92 4.90 100 4.96 5.06 75 25 -25 4.94 5.04 v in = 6.0v i out = 30ma
lr1102 cmos ic unisonic technologies co., ltd 10 of 12 www.unisonic.com.tw qw-r502-038. k ? typical characteristics(cont.) 4. supply current vs. input voltage s u p p l y c u r r e n t , i s s ( a ) 5. supply current vs. temperature 50 -50 temperature, t opr ( ) 35 45 0 lr1102-xx 20 100 30 50 25 40 v in = v out +1v 6. dropout voltage vs. set output voltage d r o p o u t v o l t a g e , v d ( v )
lr1102 cmos ic unisonic technologies co., ltd 11 of 12 www.unisonic.com.tw qw-r502-038. k ? typical characteristics(cont.) 7. ripple rejection vs. frequency r i p p l e r e j e c t i o n , r r ( d b ) r i p p l e r e j e c t i o n , r r ( d b ) 8. ripple rejection vs. input voltage (dc bias) 40 3.1 input voltage, v in (v) r i p p l e r e j e c t i o n , r r ( d b ) 50 60 lr1102-3.0v 10 0 3.5 30 80 3.4 3.2 20 70 f = 400hz 3.3 f = 1khz f = 10khz 40 3.1 input voltage, v in (v) r i p p l e r e j e c t i o n , r r ( d b ) 50 60 lr1102-3.0v 10 0 3.5 30 80 3.4 3.2 20 70 f = 400hz 3.3 f = 1khz f = 10khz i out = 10ma c out = 2.2 f i out = 1ma c out = 2.2 f 9. load transient response 3.4 0 time, t ( s) o u t p u t v o l t a g e , v o u t ( v ) 3.1 3.3 4 lr1102-3.0v 2.8 10 3.0 8 2.9 3.2 14 16 20 -150 -100 -50 0 50 100 150 o u t p u t c u r r e n t , i o u t ( m a ) 2 612 18 v in = 4v c in = tantalun 1 f c out =tantalum 4.7 f output voltage output current
lr1102 cmos ic unisonic technologies co., ltd 12 of 12 www.unisonic.com.tw qw-r502-038. k 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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