ultra low dropout, 3.0aadjustable positive linear regulator 5962 - 0323801mxa surface mount (smd-6) www.irf.com 1 10/25/06 smd-6 o m 7 764 as m description features: dropout voltage of 400mv at full load wide input range: 2.7v to 20v low noise: 40mvrms ( 10hz to 10khz ) fast transient response no protection diodes needed hermetic smd-6 package ensureshigh reliability the om7764asm is a 3.0a, ultra low dropout,adjustable linear regulator specifically designed for low voltage, high current applications. housed in a hermetic package, the dropout of these devices is 400mv at full load. all protective features are designed into the circuit including thermal shutdown, current limiting and safe area control. these units are ideally suited for military/defense, commercial aircraft, industrial control and other harsh environments where a hermetically sealed package is required. absolute maximum ratings parameter s y mbol value units output currrent i o 3.0 a input voltage v in +20 v power dissipation @ tc = 25c p d 20 w thermal resistance, junction to case r jc 5.0 c/w operating junction temperature range t j -55 to +125 storage temperature range t stg -65 to +150 c lead temperature soldering (10second maximum) t l 300 product s ummary part number output volta g e current dropout om7764asm 1.21v to 20v 3.0a 0.4v pd - 94748a downloaded from: http:///
2 www.irf.com om7764asmfootnotes - denotes specifications which apply over the full operating temperature range. - the om7764asm is tested and specified for these conditions with the adj pin connected to the out pin. electrical characteristics @t a = 25c (unless otherwise specified) parameter test conditions min. t y p. max. units minimum input voltage i load = 3.0a -2 . 32 . 7 v line regulation ? v in = 2.21v to 20v, i load = 1.0ma -2 . 01 0 v in = 2.7v, i load =1.0ma to 3.0a -5 . 01 5 v in = 2.7v, i load =1.0ma to 3.0a --5 0 v in = 2.21v, i load =1.0ma 1.192 1.210 1.228 2.7v < v in < 20v, 1.0ma < i load < 3.0a 1.168 1.210 1.246 i load = 1.0ma -0 . 0 20 . 0 5 i load = 1.0ma --0 . 1 0 i load = 100ma -0 . 0 70 . 1 3 i load = 100ma --0 . 1 8 dropout voltage i load = 500ma -0 . 1 40 . 2 0 v i load = 500ma --0 . 2 7 i load = 1.5ma -0 . 2 50 . 3 3 i load = 1.5ma --0 . 4 0 i load = 3.0a -0 . 40 . 5 4 i load = 3.0a --0 . 6 6 i load = 0ma -1 . 01 . 5 i load = 1.0ma -1 . 11 . 6 ground pin current i load = 100ma -3 . 55 . 0 v in = v out (nominal)+1 i load = 500ma -1 11 8 i load = 1.5a -4 07 5 i load = 3.0a - 120 200 ripple rejection v in - v out = 1.5v(average), v ripple = 0.5 v p-p f ripple = 120hz, i load = 1.5a, t j = +25c current limit v in = 2.7v, ? v out = -0.1v 3.1 - - a input reverse leakage current reverse output current v out = 1.21v, v in < 1.21v - 300 600 a v in = -20v, v out = 0v ma mv 55 65 - db --1 . 0m a load regulation adjust pin voltage downloaded from: http:///
www.irf.com 3 om7764asm fig 1: dropout voltage vs temperature fig 2: adjust pin voltage vs temperature fig 3: quiescent current vs input voltage fig 4: ground pin current vs input voltage downloaded from: http:///
4 www.irf.com om7764asm fig 5: current limit vs temperature layout consideration it is recommended that output capacitors be located as close as possible to the v out terminal of the device to prevent any high frequency oscillation that may result due to excessive stray inductance. specfications for capacitors: 220 f (+25v) tantalum, 100 f (+25v) tantalum, 0.1 f (+50v) ceramic fig 6: typical application v out = 1.21v(1 + (r2/r1)) + i adj (r2) i adj = 3.0ua @ 25c om7764a in out adj r2r1 gnd 0.1uf 100uf shdn 220uf 0.1uf v out v in downloaded from: http:///
www.irf.com 5 om7764asm world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 252-7105 ir leominster: 205 crawford st., leominster, massachusetts 01453, tel: (978) 534-5776 data and specifications subject to change without notice.10/2006 case outline and dimensions smd-6 part numbering nomenclature pin assignment pin # pin description 1 input 2 ground 3o u t p u t 4 a d j u s t 5n / c 6s h u t d o w n om 7764a s m m device number isolated / non-isolated s = isolated screening m = mil-prf-38535 package code m = smd-6 downloaded from: http:///
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