1/7 high current adjustable voltage regulator LM317EMP / t / mdt / s d e s c r i p t i o n the lm 317 is an adjustable 3-terminal positive voltage regulator, designed to supply 1a of output current with voltage adjustable from 1.3v ~ 37v. f e a t u r e s ty pical 1% output voltage tolerance output voltage adjustable from 1.3v ~ 37v output current in excess of 1a internal short circuit protection internal over tem p erature protection output transistor safe area com p ensation applica t ions pc motherboard lcd monitor graphic card dvd player network interface card/switch telecom equipm ent printer and other peripheral equipm ent tiger electronic co.,ltd
lm317 2/7 block diagram absolute maximum ra tings (t a=25 c) * c h a r a c t e r i s t i c sym b o l m i n . m a x . u n i t input - output voltage difference vin-vout 40 v power dissipation pd internal lim ited maxim u m junction tem p erature t j 1 5 0 c s t orage tem p erature t s - 4 0 1 5 0 c lead tem p erature (soldering, 10sec) t lead 2 6 0 c esd (hum an body m odel) esd 4000 v *: absolute m a xim u m ratings are stress ratings only and functional device operation is not im plied. the device could be dam a ged bey ond absolute m a xim u m ratings.
lm317 3/7 electrical characteristics (vin-vout=5v, iout=10ma, ta=25 c, unless otherwise specified. ) * characteristics test conditions symbol min. typ. max. unit reference voltage 10ma i out 1a 3v (v in -v out ) 40v pdQ 20w v ref 1.20 1.25 1.30 v line regulation 3v Q vin-vout Q 40v s v 0.01 0.04 %/v load regulation 0ma Q iout Q 1a si 0.2 0.4 % adjust pin current iadj 50 100 a adjust pin current change 3v Q vin-vout Q 40v, 10ma Q iout Q 1a, pd Q 20w iadj 0.2 5.0 a minimum load current vin-vout=40v i lmin 3.5 10.0 ma ripple rejection f=120hz,cout=1f tantalum, (v in -v out )=3v, i out =1a rr 60 75 db temperature stability tmin Q tj Q tmax 0.7 % rms output noise (% of v out ) ta=25 , 10hz f 10khz en 0.003 % thermal resistance, junction to case sot-223 to-252 to-220 to-263 jc 23 12 5 5 /w thermal resistance, junction to ambient sot-223 to-252 to-220 to-263 ja 165 112 54 64 /w thermal shutdown hysteresis thys 25 *: maximum power dissipation is package type and case temperature dependent.
lm317 4/7 applica t ion circuit
lm317 5/7 characteristics cur ves
lm317 6/7 outline dra wing sot - 223 unit:m m t o -220 unit:m m
lm317 7/7 t o -252 unit:m m t o -263 unit:m m
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