ultra low dropout, 3.0a adjustable positive linear regulator 5962 - 0323801mxa surface mount (smd-6) www.irf.com 1 08/07/03 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 ensures high reliability the OM7764ASM is a 3.0a, ultra low dropout, ad- justable linear regulator specifically designed for low voltage, high current applications. housed in a her- metic package, the dropout of these devices is 400mv at full load. all protective features are de- signed 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 environ- ments where a hermetically sealed package is re- quired. absolute maximum ratings parameter symbol 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 summary part number output voltage current dropout OM7764ASM 1.21v to 20v 3.0a 0.4v pd - 94748
2 www.irf.com OM7764ASM footnotes - 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. typ. 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 -2.010 v in = 2.7v, i load =1.0ma to 3.0a -5.010 mv v in = 2.7v, i load =1.0ma to 3.0a --50 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 - 0.02 0.05 i load = 1.0ma - - 0.10 i load = 100ma - 0.07 0.13 i load = 100ma - - 0.18 dropout voltage i load = 500ma - 0.14 0.20 v i load = 500ma - - 0.27 i load = 1.5ma - 0.25 0.33 i load = 1.5ma - - 0.40 i load = 3.0a - 0.4 0.54 i load = 3.0a - - 0.66 i load = 0ma -1.01.5 i load = 1.0ma -1.11.6 ground pin current i load = 100ma -3.55.0 ma v in = v out (nominal)+1 i load = 500ma -1118 i load = 1.5a -4075 i load = 3.0a -120200 ripple rejection v in - v out = 1.5v(average), v ripple = 0.5 v p-p 55 65 - db 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 v in = -20v, v out = 0v --1.0ma current reverse output current v out = 1.21v, v in < 1.21v -300600 a load regulation adjust pin voltage
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
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 r2 r1 gnd 0.1uf 100uf shdn 220uf 0.1uf v out v in
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. 08/03 case outline and dimensions ? smd-6 1 2 3 6 4 5 part numbering nomenclature om 7764a s m x omnirel device s=isolated package screening pin assignment pin # pin description 1 input 2 ground 3output 4 adjust 5n/c 6 shutdown
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