www.irf.com 1 features low dropout voltage and ground currents high current capability built-in thermal overload protection short circuit current limiting output voltage tolerance guaranteed to 1% hermetic to-257aa (isolated tab) package ensures high reliability output current 2.6a this part is also available in smd-1 package as om7671nm to-204aa package as om7671nk 3-pin surface mount (smd-3) package as om7671sm 07/10/07 description low dropout positive voltage regulator om7671st 3.3v, 2.6a this series of +3.3v voltage regulators are high current, high accuracy, low dropout regulators and are well suited for systems where low dropout voltages are critical. these devices feature protection against overtemperature, overcurrent, reverse polarity conditions and voltage spikes. the to-257aa (isolated tab) hermetic package meets the demand for military/ defense environments. absolute maximum ratings @ t c =25c parameter symbol value units output current i o 2.6 a input voltage v in 30 v power dissipation p d 26 w thermal resistance, junction to case r jc 4.2 c/w operating junction temperature range t j -55 to +125 storage temperature range t stg -65 to +150 c lead temperature (soldering 10 seconds maximum) t l 300 to-257aa product summary part number output voltage output current package om7671st 3.3v 2.6a to-257aa pd - 97294
2 www.irf.com om7671st 1. line and load regulation are measured at a constant junction temperature using a low duty cycle pulse technique. although power dissipation is internally limited, regulation is guaranteed up to the maximum power dissipation of 26w. power dissipation is determined by the input/output differential voltage and output current. guaranteed maximum power dissipation will not be available over the full input/output voltage range. 2. guaranteed by design, characterization or correlation to other tested parameters. 3. specifications apply over the operating temperature range. notes electrical characteristics -55c t a 125c (unless otherwise specified) parameter symbol test conditions min. max. units v in = 5.0v, i out = 10ma, t a = 25c 3.267 3.333 4.75v v in 18v, 10ma i out i lmin 3.235 3.365 line regulation v out / v in 4.5v v in 18v, i out = 0 a -12 v in = 5.0v, 0a i out i lmin , t a = 25c -15 v in = 5.0v, 0a i out i lmin -25 dropout voltage v drop i out = i lmin , v ref = 1% -1.5v thermal regulation - pulse width = 30ms, t a = +25c - 0.04 %/w f = 120hz, c adj = 25 f, c out = 25 f (tantalum), i out = i lmin v in = 6.3v quiescent current i q v in = 18v -10ma v in = 8.3v 2.6 - v in =28v 0.050 - temperature stability v out / t -55c t j +125c -1.55 long term stability v out / tt a = +125c, t = 1000hrs - 1.0 v output voltage v out v out / i out mv load regulation % a current limit i l db ripple rejection v in / v out 60 -
www.irf.com 3 om7671st dropout voltage short circuit current load regulation fig 1: typical minimum output differential vs output current fig 2: typical short circuit current vs input/output differential fig 3: typical output voltage deviation vs temperature
4 www.irf.com om7671st ir world headquarters: 233 kansas st., el segundo, california 90245, usa tel: (310) 252-7105 ir leominster : 205 crawford st., leominster, massachusetts 01453, usa tel: (978) 534-5776 data and specifications subject to change without notice. 07/2007 part numbering nomenclature case outline and dimensions - to-257aa 3pin (t-3) pin assignments pin 1 - ground pin 2 - vout pin 3 - vin om 7671 s t device number isolated / non-isolated s = isolated package code t = to-257aa
|
