unisonic technologies co., ltd lr1101 cmos ic www.unisonic.com.tw 1 of 8 copyright ? 2011 unisonic technologies co., ltd qw-r102-034.e 100ma, 4 a quiescent current cmos ldo regulator ? description the utc lr1101 series are ultra-low quiescent current cmos ldo (low dropout voltage). designed for battery-powered system, the low 4 a quiescent current makes it an ideal choice. the range of the output voltage is from 1.5v ~ 5v with 0.1v per step. and the max output current is 100ma. wide range of available output fi ts most of applications. built-in output current-limiting provide maximal protection against any fault conditions. ? features * 450mv typically dropout at 100ma * ultra-low quiescent current: 4 a * wide operating voltage ranges: 2v ~ 6v * thermal current limiting protection * for stability only 1 f output capacitor is required * high power supply rejection ratio ? ordering information ordering number package pin assignment packing lead free halogen free 1234 5 lr1101l-xx-ab3-c-r lr1101g-xx-ab3-c-r sot-89 g i o - - tape reel LR1101L-XX-AE3-5-R lr1101g-xx-ae3-5-r sot-23 g o i - - tape reel lr1101l-xx-af5-r lr1101g-xx-af5-r sot-25 i g en nc o tape reel note: pin assignment: i: v in o: v out g: gnd nc: no connection en: enable
lr1101 cmos ic unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r102-034.e ? marking informations package voltage code pin code 1 2 3 4 5 marking sot-89 15:1.5v 18:1.8v 25:2.5v 28:2.8v 30:3.0v 33:3.3v 35:3.5v 36:3.6v 47:4.7v 50:5.0v c g i o - - sot-25 - i g en nc o 3 2 1 5 4 sg xx voltage code g: halogen free l: lead free sot-23 5 g o i - - 1 2 3 voltage code sg l: lead free g: halogen free ? pin description pin no. pin name description sot-89 sot-25 sot-23 2 1 3 v in input voltage 3 5 2 v out output voltage 1 2 1 gnd ground - 3 - en chip enable input - 4 - nc no connection
lr1101 cmos ic unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r102-034.e ? block diagram _ + current limit en v in v out gnd
lr1101 cmos ic unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r102-034.e ? absolute maximum ratings parameter symbol ratings unit input voltage v in 7 v power dissipation (t a = 25 ) sot-89 p d 500 mw sot-23 250 mw sot-25 250 mw junction temperature t j 125 operating temperature t opr -40 ~ +85 storage temperature t stg -65 ~ +150 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. ? thermal data parameter symbol ratings unit thermal resistance sot-89 ja 180 /w sot-23 250 /w sot-25 250 /w ? electrical characteristics (v in =5.5v, c i =1 f, co=1 f,t a =25 unless otherwise specified) parameter symbol test conditions min. typ. max. unit input voltage range v in 2 6 v output voltage accuracy v out i l = 1ma -2 +2 % line regulation v line v in = (v out + 0.3v) to 6v, v in R 3.6v, i out = 1ma -0.2 0.2 %/v load regulation v load i lout = 0ma to 100ma 0.01 0.04 %/ma maximum output current i ma x v in = v out + 0.6v, v in R 3.6v 100 ma current limit i limit i l = 100ma 150 250 ma gnd pin current i g no load 4 7 a i out = 100ma 4 10 dropout voltage v d i out = 1ma, v in R 3.6v 4 10 mv i out = 50ma, v in R 3.6v 200 300 i out = 100ma, v in R 3.6v 450 600 stand by current i stn-by en = v in 0.1 1 a en threshold en v out = high 0 0.6 v v out = low 2 v in short current i sc v out = 0 500 ma thermal shutdown exterior calefaction 125
lr1101 cmos ic unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r102-034.e ? application information between v out and gnd a 1 f (or larger) capacitor is recommended for stability. without t he capacitor the part may oscillate. when operating below -25 any type of capacitor can be used , but not aluminum electrolytes. if there?s no limit the capac itance may be increased. between v in to gnd a 1 f capacitor (or larger) should be placed. ? application circuit v in gnd v out utc lr1101 v in v out c i 1f c o 1f
lr1101 cmos ic unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r102-034.e ? typical characteristics 3.7 2.5 1.7 -50 -25 0 25 50 75 100 temperature ( ) o u t p u t v o l t a g e ( v ) 2.1 2.9 3.3 temperature stability 5 0 -30 0306090 i a 1 2 4 quiescient current 125 3 120 temperature ( ) v out =3.3v v out =1.8v v in =5v d r o p u t v o l t a g e ( v ) s h o r t c i r c u i t c u r r e n t ( m a ) p s r r ( d b ) p s r r ( d b )
lr1101 cmos ic unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r102-034.e ? typical characteristics(cont.) line transient response time (ms) 3 t t 4 5 6 0 100 200 300 01 2 34 5 6 7 8 9 10 line transient response time (ms) 3 t t 4 5 6 0 100 200 300 0 123456789 10 v out =1.8v t a =25 c out =1f electoltic i out =50ma t v out =3.3v t a =25 c out =1f electoltic i out =50ma load current (ma) load transient response time (500s/div) -50 t output voltage deviation (mv) 1 50 100 -20 0 20 40 load current (ma) load transient response -100 output voltage deviation (mv) 10 100 200 -50 0 50 100 t c in =1f ceramic c out =1f ceramic v in =5v, t a =25 v out =1.8v time (500s/div) c in =1f ceramic c out =1f ceramic v in =5v, t a =25 v out =1.8v load current (ma) output voltage deviation (mv) load current (ma) output voltage deviation (mv)
lr1101 cmos ic unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r102-034.e 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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