1 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 general description the l1085g is a positive and low dropout three-terminal voltage regulator with 3a out- put current capability. this device is design- ed for use in low voltage applications that offers lower dropout vo ltage and faster tran- sient response. this device is fully protected against over current faults, over temperature operation, reversed input polarity, reversed lead insert- ion, transient voltage spike ?etc. on-chips trimming the reference voltage to 1% and features the low dropout of maxi- mum 1.45 volts. the l1085g series regulators are available in the popular industry standard to-220 to-263 and to-252 packages. features z very easy to use, it requires only two external resistors to set the output voltage z low dropout voltage: 1.3v typical at up to 3a z low ground current z fast transient response z current & thermal limiting z line regulation: 0.5% typical z load regulation: 0.5% typical z to-220, to-263 and to-252 packages applications z high current microprocessor supplies z low voltage logic supply z powering vga & sound card z portable instrumentation z constant current regulator z post regulator for switching power supply typical application - basic adjustable regulator circuit - + cin 10uf r2 + cout 10uf r1 in adj out l1085 vin 1. cin needed if device is far from from filter capacitors. iadj vo = vref (1+r2/r1) + iadj x r2 vout vref 2. cout required for stability. free datasheet http://
2 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 absolute maximum ratings z maximum supply voltage 7v z operating junction temperature range 0 to 125 c z power dissipation internally limited z storage temperature range -40 to 150 c z thermal resistance junction to case, jc 5 c/w z lead temperature (soldering, 10 seconds) 260 c z thermal resistance junction to ambient, ja to-263 to-252 to-220 60 c/w 70 c/w 50 c/w electrical characteristics ( unless otherwise specified, t a = 25 c.) parameter symbol test conditions typical limits reference voltage v ref v in = 5v, i out = 10ma 1.25v 1.23v min 1.27v max dropout voltage v d v ref = 1%, i out = 3a 1.3v 1.45v line regulation reg (line) (v out + 1.5v) v in 7v, i out = 10ma 0.5% 2% load regulation reg (load) (v in -v out ) = 3v, 10ma i out 3a 0.5% 2.5% minimum load current i o 1.5v (v in -v out ) 5.75v 10ma adjust pin current i adj 55 a 100 a current limit i cl v in - v out = 2v 5.0a 4.0a (min) rms output noise v n 0.003% of v out ripple rejection ratio r a f = 120hz, c adj = 22 f for adj pin, v in = 5v, i out = 3a 72db 60db (min) device selection guide device L1085DG l1085sg l1085s3g l1085tg package to-252 to-263 (2-lead) to-263 (3-lead) to-220 marking L1085DG l1085sg l1085s3g l1085tg orders for parts with lead-free plating can be placed using the lxxxxxg parts name. free datasheet http://
3 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 pin configurations pin # function 1 adjust 2 output 3 input note: tab is output pin free datasheet http://
4 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 to-263 (d 2 pak) mechanical data mm mm dimension min. typ. max. dimension min. typ. max. a 14.5 15 15.8 h 1.0 1.5 1.8 b 4.2 4.7 i 9.8 10.3 c 1.20 1.35 j 6.5 d 2.8 k 1.5 e 0.3 0.4 0.5 l 0.7 1.4 f -0.102 0.203 m 4.83 5.08 5.33 g 8.5 9 9.5 n h i b a j c k m l e g f 12 3 d free datasheet http://
5 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 to-263 (d 2 pak) mechanical data mm mm dimension min. typ. max. dimension min. typ. max. a 14.5 15 15.8 h 1.0 1.5 1.8 b 4.2 4.7 i 9.8 10.3 c 1.20 1.35 j 6.5 d 2.8 k 1.5 e 0.3 0.4 0.5 l 0.7 1.4 f -0.102 0.203 m 4.83 5.08 5.33 g 8.5 9 9.5 n h i b a j c k m l e g f 12 3 d free datasheet http://
6 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 b i d g h f e 13 2 a c l m j k to-220 (3-lead) mechanical data mm mm dimension min. typ. max. dimension min. typ. max. a 9.78 10.16 10.54 h 2.4 2.54 2.68 b 2.61 2.74 2.87 i 1.19 1.27 1.35 c 20 j 4.4 4.6 4.8 d 28.5 28.9 29.3 k 1.14 1.27 1.4 e 14.6 15.0 15.4 l 2.3 2.6 2.9 f 8.4 8.8 9.2 m 0.26 0.46 0.66 g 0.72 0.8 0.88 n 7 free datasheet http://
7 3a adjustable low dropout linear regulator (ldo) niko-sem l1085xg to-252,263,220 lead-free jul-15-2004 to-252 (dpak) mechanical data mm mm dimension min. typ. max. dimension min. typ. max. a 9.35 10.4 h 0.89 2.03 b 2.2 2.4 i 6.35 6.80 c 0.45 0.6 j 5.2 5.5 d 0.89 1.5 k 0.6 1 e 0.45 0.69 l 0.5 0.9 f 0.03 0.23 m 3.96 4.57 5.18 g 5.2 6.2 n g a h j i b c m l k d e f 13 2 free datasheet http://
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