ultra low dropout, 10a adjustable positive linear regulator 5962 - 0323702mza thru-hole (c6) www.irf.com 1 12/03/03 c-6 o m 7 5 8 1 s c description features: dropout voltage of 660mv at full load dropout voltage of 100mv at light loads fast transient response adjustable output: 1.8 to 5.5v remote sense hermetic c-6 package ensures high reliability the om7581sc is a 10a, ultra low dropout, adjust-able linear regulator specifically designed for low voltage, high current applications. housed in a her- metic package, the dropout of this device is 660mv at full load and as low a 100mv at light loads. the low dropout is achieved by an additional low cur- rent input voltage. this unit is ideally suited for mili- tary/defense, commercial aircraft, industrial control and other harsh environments where a hermetically sealed package is required. product summary part number output voltage current dropout om7581sc +1.8v to +5.5v 10a 0.66v absolute maximum ratings parameter symbol value units output currrent i o 10 a power input voltage v pwr 6.0 control input voltage v ctrl 13 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 v pd - 94772 downloaded from: http:///
2 www.irf.com om7581sc footnotes - denotes specifications which apply over the full operating temperature range. - the minimum load current is minimum current required to maintain regulation. normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. - the control pin current is the drive current required for the output transistor. the control pin current is approximately 0.01% output current. the minimum value is equal to quiescent current of the device. electrical characteristics @t a = 25c (unless otherwise specified) parameter test conditions min. typ. max. units reference voltage v ctrl = 2.7v, v pwr = 2.0v, i load = 10ma 1.243 1.250 1.257 v adj = 0v v ctrl =2.7 to 12v, v pwr =1.75v to 5.5v, i load =10ma to 10a 1.237 1.250 1.263 line regulation v ctrl = 2.5 to 12v, v pwr = 3.0v to 5.5v, i load = 1.0ma -- 1.0 3.0 load regulation v ctrl = 2.75v, v pwr = 2.75v, i load = 10ma to 10a -- 1.0 10 minimum load current v ctrl = 5.0v, v pwr = 3.3v, v adj = 0v -- 3.0 10 ground pin current v ctrl = 5.0v, v pwr = 3.3v, i load = 0ma -- 6.0 10 ma control pin current v ctrl = 2.75v, v pwr = 2.75v, i load = 10a -- -- 170 adjust pin current v ctrl = 2.75v, v pwr = 2.05v, i load = 10ma -- 50 120 a v adj = 0v v ctrl = v pwr = 5.0v (avg), v ripple = 1.0v p-p , f= 120hz 60 80 -- db i out = 4.0a tj = 25c v ctrl = 2.75v, v pwr = 2.75v, ? v out = 100mv, tj = 25c 10.1 11 -- v ctrl =2.75v, v pwr =2.75v, ? v out =100mv, tj=-55c & tj=+125c 10.1 -- -- minimum v control v pwr = 3.3v, i load = 10a -- -- 1.35 v ctrl = 2.75v, i load = 10a, tj = 25c -- -- 0.66 v ctrl = 2.75v, i load = 10a, tj = 125c -- -- 0.85 v ctrl = 2.75v, i load =10a, tj = -55c -- -- 0.85 thermal regulation v pwr = 5.0v, i o = 10a, p d 20w, pulse width = 30ms -- -- 0.02 %/w dropout is caused by either minimum control voltage or minimum power v oltage. both dropout voltage parameters are specified with respect to the output voltage. the specific ations represent the minimum input/output voltage required to maintain 1% regulation. minimum v pwr v ripple rejection current limit v mv a downloaded from: http:///
www.irf.com 3 om7581sc fig 1: typical power voltage vs output current fig 2: typical control voltage vs output current fig 3: typical reference voltage vs temperature downloaded from: http:///
4 www.irf.com om7581sc 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. 12/03 case outline and dimensions c-6 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: 330 f tantalum low esr, 220 f electrolytic, 22 f electrolytic fig 5: typical application v out = 1.25v(1 + (r2/r1)) + i adj (r2) i adj = 50ua @ 25c om7581 v out pin1 3.3v 0.1uf 1uf ( x5 ) v power v control 0.1uf 5v adj r1 r2 sense 22uf 0.1uf 220uf 1uf ( x5 ) 330uf pin2 pin3 pin4 pin5 pin assignment pin # pin description 1 adjust 2n / c 3s e n s e 4 v ctrl 5 v out 6 v pwr part numbering nomenclature om 7581 s c x omnirel device s=isolated package screening 1 2 3 64 5 downloaded from: http:///
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