jia n gsu changjiang electronics technology co., ltd t o -2 52-2l plastic-encapsulate voltage regulator s LM317 three-term inal positive volt age regulator description this monolithic integrated circui t is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5a of load current with an output voltage adjustable over a 1.2 to 37v. it employs internal curr ent limiting , thermal shut-down and safe area compensation. feature z internal ther mal overlo ad protection z internal short circuit current limiting z output transistor safe oper ating are a compensation t o -2 52-2l 1. adj 2. output 3. input inte r nal block diagram rl i mit 3 vin vo 1 vo lt age reference va d j 2 p r otection circuitry + - i npu t output typical application c i is required when regulator is located an ap preciable distance from power supply filter. c o is not needed for stability , however, it does improve transient response. since i adj is controlled to less than 100a, the error associated with this term is negligible in most applications. www.cj-elec.com 1 d , mar ,201 6
absolute maximum ratings sy mbol para meter value units v i -v o input-output v oltag e differential 40 v t lead lea d temperature 230 p d po w er dissipation internally limited w t j operatin g junction te mperature range 0~125 t stg s t orage temperature range - 5 5~125 v o / t t emperature coefficient of output voltage 0.02 %/ electrical chara ct eristics (v o -v i =5 v,i o =0. 5 a,0 t j + 125 ,i max =1 .5a,p dmax = 20w ,unless otherwise specified) pa rame ter symbol test conditions min typ max unit t a =2 5 3v v i -v o 40 v 0.01 0.04 line r e gulation(note1) r lin e 3v v i -v o 40 v 0.02 0.07 %/v t a =2 5 , 10m a i o i ma x v o <5 v v o 5v 18 0.4 25 0.5 loa d reg ulation(note1) r l oad 10ma i o i ma x v o <5 v v o 5v 40 0.8 70 1.5 adjusta b le pin current l ad j - 46 100 adjusta b le pin current change l ad j 3v v i -v o 40 v 10ma i o i ma x , p d p ma x 2.0 5 a refere nce volt age v re f 3v v in -v o 40v 10ma i o i ma x , p d p ma x 1.20 1.25 1.30 v t e mperature stability st t - 0.7 %/ v o minimum load current to maintain regu lati on i l (mi n) v i -v o = 40v 3.5 12 ma maximum output current i o (ma x) v i -v o 15v, p d p ma x v i -v o 40v, p d p ma x t a =2 5 1.0 2.2 0.3 a rms noise,% of v out e n t a =2 5 ,10 hz f 10k hz 0.003 0.01 %/ v o ripp le re jection rr v o =10v, f =12 0 hz without c ad j c ad j = 10f (note2) 66 60 75 db lon g-t erm stability,t j =t hi gh st t a =2 5 for end poi nt mesasurements,1000hr 0.3 1 % t hermal resistance ju nction to case r jc - 5 /w notes : 1. load a nd l ine regulation are specified at constant junction temperature. change in v d d ue to heati ng effects must be taken into account separately. pulse testing with low duty is used.(p ma x = 20w ) 2.c ad j . w hen used, is connected between the adjustment pin and ground. www.cj-elec.com 2 ' , 0 d u ,201 mv v o %
min . ma x . min . ma x . a 2. 200 2.380 0.087 0.094 a1 0.000 0.100 0.000 0.004 b 0.800 1.400 0.031 0.055 b 0.710 0.810 0.028 0.032 c 0.460 0.560 0.018 0.022 c1 0.460 0.560 0.018 0.022 d 6.500 6.700 0.256 0.264 d1 5.130 5.460 0.202 0.215 e 6.000 6.200 0.236 0.244 e e1 4.327 4.727 0.170 0.186 m n l 9.800 10.400 0.386 0.409 l1 l2 1.400 1.700 0.055 0.067 v - 0.190 ref. 1.778ref. 0.762ref. 0.070ref. 0.018ref. 4.830 ref. 2.9ref. 0.114ref. symbol dimensions in millimeters dimensions in inches 2.286 typ. 0.090 typ. www.cj-elec.com ' , 0 d u ,201
to-252(4r)-2l tape and reel www.cj-elec.com ' , 0 d u ,201
|
