unisonic technologies co., ltd lr3965 cmos ic www.unisonic.com.tw 1 of 10 copyright ? 2012 unisonic technologies co., ltd qw-r102-037.p 1.5 a lo w dropout linear regulator ? description the utc lr3965 belonged to low-noise, low-dropout, linear regulators operate from 2.25v to 6v input and are guaranteed to deliver 1.5a. wide range of preset out put voltage options are available. built-in low on-resistanc e transistor provides low dropout voltage and large output current. the utc lr3965 is designed and optimized for battery-powered systems to work with low noise. the utc lr3965 consumes less than 0.01 a in shutdown mode. o ther features include ultra low dropout voltage, current limiting protection, thermal shut down protection and high ripple rejection ratio. ? features * 1.5a guaranteed output current * 0.01 a shutdown current * 40mv dropout at 150ma load * low temperature coefficient * current limiting protection * thermal shutdown protection * excellent line/load transient * sense option improves load regulation ? ordering information note: pin assignment: i:v in o:v out g:gnd s: shdn a: adj/sense/ss/pok ordering number package pin assignment packing lead free halogen free 1 2 3 4 5 6 7 8 lr3965l-xx-ab3-c-r lr3965g-xx-ab3-c-r sot-89 g i o - - - - - tape reel lr3965l-xx-aa3-a-r lr3965g-xx-aa3-a-r sot-223 g o i - - - - - tape reel lr3965l-xx-aa3-d-r lr3965g-xx-aa3-d-r sot-223 i g o - - - - - tape reel lr3965l-xx-tn3-a-r lr3965g-xx-tn3-a-r to-252 g o i - - - - - tape reel lr3965l-xx-tn3-a-t lr3965g-xx-tn3-a-t to-252 g o i - - - - - tube lr3965l-xx-tn3-d-r lr3965g-xx-tn3-d-r to-252 i g o - - - - - tape reel lr3965l-xx-tn3-d-t lr3965g-xx-tn3-d-t to-252 i g o - - - - - tube lr3965l-xx-tq2-a-r lr3965g-xx-tq2-a-r to-263 g o i - - - - - tape reel LR3965L-XX-TQ2-A-T lr3965g-xx-tq2-a-t to-263 g o i - - - - - tube lr3965l-xx-tq2-d-r lr3965g-xx-tq2-d-r to-263 i g o - - - - - tape reel lr3965l-xx-tq2-d-t lr3965g-xx-tq2-d-t to-263 i g o - - - - - tube lr3965l-xx-tn4-r lr3965g-xx-tn4-r to-252-4 s i g o a - - - tape reel lr3965l-xx-tn4-t lr3965g-xx-tn4-t to-252-4 s i g o a - - - tube lr3965l-xx-tn5-r lr3965g-xx-tn5-r to-252-5 s i g o a - - - tape reel lr3965l-xx-tn5-t lr3965g-xx-tn5-t to-252-5 s i g o a - - - tube lr3965l-xx-tq5-r lr3965g-xx-tq5-r to-263-5 s i g o a - - - tape reel lr3965l-xx-tq5-t lr3965g-xx-tq5-t to-263-5 s i g o a - - - tube lr3965l-xx-s08-r lr3965g-xx-s08-r sop-8 s i o a g g g g tape reel lr3965l-xx-s08-t lr3965g-xx-s08-t sop-8 s i o a g g g g tube
lr3965 cmos ic unisonic technologies co., ltd 2 of 10 www.unisonic.com.tw qw-r102-037.p ? ordering information(cont.) ? marking information package voltage code marking sot-223 12 :1.2v 15 :1.5v 18 :1.8v 25 :2.5v 33 :3.3v 50 :5.0v sot-89 123 xx lr3965 x date code voltage code l: lead free g: halogen free pin code xx to-252 to-263 to-252-4 to-252-5 to-263-5 12 :1.2v 15 :1.5v 18 :1.8v 25 :2.5v 33 :3.3v 50 :5.0v ad :adj sop-8
lr3965 cmos ic unisonic technologies co., ltd 3 of 10 www.unisonic.com.tw qw-r102-037.p ? pin configuration gnd v out v in to-252/to-263 shdn v in v out gnd gnd gnd gnd 8 7 6 5 4 3 2 1 sop-8 1 2 3 v in gnd v out sot-223 1 23 gnd v in v out sot-89 1 2 3 1 2 3 4 5 sense/adj/ss/pok v out gnd v in to-252-4/to-25 2-5/to-263-5 shdn sense/adj/ss/pok ? pin description pin name description v in power input voltage. supply voltage can range fr om 2.25v to 6v. bypass with a 68f capacitor to gnd. gnd ground shdn active-low shutdown input. a logic low at shdn reduces supply current to 0.01a. in shutdown, the pok output is low. connect shdn to v in for normal operation. v out output voltage adj voltage-adjust input. connect adj to gnd for preset output. connect an external resistive voltage-divider from v out to adj to set the output voltage between 0.8v and 6v. the adj regulation voltage is 800mv sense remote sense pin. ss soft start time setting. for adjustable soft start time version, connect a capacitor from ss to gnd to set the soft start time. pok open-drain, active-low power-ok output. pok rema ins low while the output voltage (vout) is below the pok threshold.
lr3965 cmos ic unisonic technologies co., ltd 4 of 10 www.unisonic.com.tw qw-r102-037.p ? block diagram shdn v ref off on 80mv 93% v ref gnd adj ss v out shdn pok v in sense + - + - err amp + - uvlo current limit thermal sensor
lr3965 cmos ic unisonic technologies co., ltd 5 of 10 www.unisonic.com.tw qw-r102-037.p ? absolute maximum rating (t a =25 , unless otherwise specified) parameter symbol ratings unit supply voltage v in 6.5 v power dissipation sop-8 p d 606 mw sot-223 714 sot-89 500 to-252/to-252-5/to-252-4 952 to-263/to-263-5 1250 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 junction to ambient sop-8 ja 165 c/w sot-223 150 sot-89 180 to-252/to-252-5/to-252-4 112 to-263/to-263-5 64 junction to case sop-8 jc 20 c/w sot-223 15 sot-89 50 to-252/to-252-5/to-252-4 12 to-263/to-263-5 4
lr3965 cmos ic unisonic technologies co., ltd 6 of 10 www.unisonic.com.tw qw-r102-037.p ? electrical characteristics (t a = 25c, v in = v out + 1v or v in =2.25v whichever is greater, c in = 68f, c out =33f, unless otherwise specified) parameter symbol test conditions min typ max unit input voltage v in note1 6 v output voltage accuracy (preset mode) v out t a 25 , i out = 1ma ~1.5a -2 2 % t a 0~85 , i out = 1ma~1.5a -3 3 % maximum output current i out 1.5 a short-circuit current limit i limit v out =0v 2.5 a ground pin current i gnd i out = 0ma 200 a i out = 1ma to 1.5a 250 a dropout voltage (note 2) v d i out =1.5a v out ( nom ) <=1.8v 1000 1050 mv 1.8v lr3965 cmos ic unisonic technologies co., ltd 7 of 10 www.unisonic.com.tw qw-r102-037.p ? typical application circuit lr3965 v in v out gnd v out c out 33f v in c in 68f lr3965 v in v out c out 33f v in c in 68 f gnd sense v out shdn l o a d on off + +
lr3965 cmos ic unisonic technologies co., ltd 8 of 10 www.unisonic.com.tw qw-r102-037.p ? typical application circuit (cont.)
lr3965 cmos ic unisonic technologies co., ltd 9 of 10 www.unisonic.com.tw qw-r102-037.p ? typical characteristics 0123456 0.0 0.5 1.0 1.5 2.0 2.5 3.0 output voltage, v out (v) input voltage, v in (v) output voltage vs input voltage i out =1.5a i out =0ma 20 30 40 50 60 70 80 90 100 110120 130 140 -2.00 -1.75 -1.50 -1.25 -1.00 -0.75 -0.50 -0.25 0.00 0.25 vout votalge change (%) air ambient temperature( ) ambient temperature vs. output voltage change 0 200 400 600 800 1000 1200 1400 1600 0 50 100 150 200 250 300 350 400 drop-out (mv) output current, i out (ma) drop-out voltage vs. load current ground pin current vs. input voltage 23456 50 100 150 200 250 300 ground pin current, i gnd (a) input voltage, v in (v) line transient v out v in c in =c out =10 f(ceramic,y5v) lr3965-2.5v v in (v) 2.7 2.5 2.3 5.0 4.0 3.0 v out (v) i out =100ma line transient v out v in c in =c out =10 f(ceramic,y5v) lr3965-1.8v v in (v) 2.0 1.8 1.6 5.0 4.0 3.0 v out (v) i out =100ma lr3965-2.5v
lr3965 cmos ic unisonic technologies co., ltd 10 of 10 www.unisonic.com.tw qw-r102-037.p ? typical characteristics (cont.) load transient v out i out c in =c out =10 f(ceramic,y5v) lr3965-2.5v 1000 500 0 2.55 2.5 2.45 shutdown v shdn v out i out c in =c out =10 f(ceramic,y5v) v in =5v,t=25c 100 0 2 1 0 5 0 lr3965-2.5v i load =1ma to 700ma
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