unisonic technologies co., ltd LM317L linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2008 unisonic technologies co., ltd qw-r101-008.d low current 1.25v to 37v adjustable voltage regulator ? description the utc LM317L is a monolithic integrated circuit, designed to supply 100ma of output current with voltage adjustable from 1.25v ~ 37v. ? features *output voltage adjustabl e from 1.25v ~ 37v. *output current in excess of 100ma *internal thermal overload protection *internal short circuit current limiting *output transistor safe area compensation to-92 1 sop-8 lead-free: LM317Lk halogen-free: LM317Lg ? ordering information ordering number pin assignment normal lead free halogen free package 1 2 3 4 5 6 7 8 packing LM317L-t92-b LM317Lk-t92-b LM317Lg-t92-b to-92 a o i - - - - - tape box LM317L-t92-k LM317Lk-t92-k LM317Lg-t92-k to-92 a o i - - - - - bulk LM317L-s08-r LM317Lk-s08-r LM317Lg-s 08-r sop-8 i o o a n o o n tape reel LM317L-s08-t LM317Lk-s08-t LM317Lg-s08-t sop-8 i o o a n o o n tube note: pin assignment: a:adj i:v in o:v out n: no connection
LM317L linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r101-008.d ? block diagram v ref input v adj protection circuit output
LM317L linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r101-008.d ? absolute maximum ratings parameter symbol rating unit input-output differ ential voltage v in -v out 40 v power dissipation p d internally limited junction temperature t j +125 c operating junction temperature t opr 0 ~ +125 c storage temperature range t str -40 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? electrical characteristics (v in -v out =5v, i out =40ma, ta=25 c, unless otherwise specified.) parameter symbol test conditions min typ max unit line regulation v out /v out 3v Q v in -v out Q 40v, i load <20ma 0.01 0.04 %/v v out Q 5v 5 25 mv load regulation v out 5ma Q i out Q 100ma v out R 5v 0.1 0.5 % adjustable pin current i adj 50 100 a adjustable pin current change i adj 3v Q v in -v out Q 40v, 5ma Q i out Q 100ma, p d 625mw 0.2 5 a reference voltage v ref 3v Q v in -v out Q 40v, 5ma Q i out Q 100ma, p d 625mw 1.20 1.25 1.30 v temperature stability t min Q t j Q t max 0.7 %/v out minimum load current for regulation i l(min) v in -v out =40v 3.5 10 ma maximum output current i o(max) v in -v out =40v, p d Q 625mw 50 ma rms noise vs. %of v out en 10h z Q f Q 10kh z 0.003 0.01 %/v out c adj =0 65 db ripple rejection rr v out =10v,f=120h z , c adj =10 f 66 80 db note: c adj is connected between adjust pin and ground.
LM317L linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r101-008.d ? application circuits utc LM317L 1 2 3 1 2 3 v out v in v adj r2 240 50k d1 1n4001 10 f i out i adj r1 r2 vo ut v in r1 1.25v r1 i o(min) =( v ref r1+r2 )+i adj = 1.25v r1+r2 5maLM317L )+i adj = v ref i o(max) =(
LM317L linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r101-008.d ? typical characteristics 0255075100125 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 temperature output voltage deviation, ? v out (%) -50 -25 0 25 50 75 100 125 35 40 45 50 55 60 adjustment current, i adj ( a) temperature load regulation vs. temperature adjustment current vs. temperature v in =15v v out =10v 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 lif e support appliances, devices or systems where malfunction of these products can be reasonably expe cted to result in personal injury. reproduction in whole or in part is prohibited without the prior writ ten 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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