absolute maximum ratings symbol parameter value units i o output current 3.5 a v in input voltage +8.0 v vout output voltage range +6.1 to +7.0 v p tot power dissipation tc=25 o c 19 w r thjc thermal resistance, junction to case (mo-078aa) 6.5 c/w r thjc thermal resistance, junction to case (8 lead flatpack) 6.5 c/w t j operating junction -55 to +125 o c t stg storage temperature range -65 to +150 o c t l lead temperature 300 o c ultra low dropout OM8506SC adjustable linear regulator om8506sf hermetic package +7.5vin / +6.1 to +7.0vout at 3.0a www.irf.com 1 features: n ultra low dropout voltage of 0.4 volt significantly reduces power consumption n low noise, higher efficiency n remote shutdown permits power sequencing to be easily implemented n hermetic mo-078aa (to-258aa) and 8- lead flat pack ensure higher reliability n available h-level screened the om8506 is an ultra low dropout adjustable linear regu- lator designed specifically for hi-rel applications. housed in either a 5 pin through hole or 8 lead surface mount package, these regulators provide high reliability in mili- tary/defense applications. the ultra low dropout voltage of 0.4v @ 3a makes the part particularly useful for applica- tions requiring low noise and higher efficiency. mo-078aa pd-94471a product summary part number dropout i o vin package OM8506SC 0.4 v 3.0a 7.5v mo-078aa om8506sf 0.4 v 3.0a 7.5v 8-lead flatpack 8/20/02
2 www.irf.com OM8506SC, om8506sf electrical characteristics @ t a = 25c (unless otherwise specified) electrical characteristics t a = -55 to +125c parameter conditions symbol min. typ. max unit input voltage range- operating io= 3.0a 6.5 8.0 v reference voltage 1.252 1.265 1.278 v 7.13 vin 7.88, io= 3.0a -100 +100 mv 6.75 vin 8, io= 50ma -5 +5 mv vin= 7.5v 10ma iout 3.0a dropout voltage io= 3.0a. vin= 7.5v vdrop 0.4 v current limit vin= 7.5v, overcurrent latchup ilatch 3.0 a ripple rejection f= 120 hz., vout= vref 65 db shutdown source current vshdn= 5v ishdn 200 ua shutdown pin threshold isource= 200ua vshdn 1.0 1.6 v vin= 7.5v, io= 50ma, shdn= +5.0v line regulation vline load regulation vload -20 +20 mv output voltage at shutdown vout (shdn) -0.1 +0.1 v parameter conditions symbol min. typ. max unit input voltage range- operating io= 3.0a 6.5 8.0 v reference voltage 1.225 1.265 1.305 v 7.13 vin 7.88, io= 3.0a -150 +150 mv 6.75 vin 8, io= 50ma -150 +150 mv vin= 7.5v 10ma iout 3.0a dropout voltage io= 3.0a. vin= 7.5v vdrop 0.4 v current limit vin= 7.5v, overcurrent latchup ilatch 3.0 a ripple rejection f= 120 hz., vout= vref 65 db shutdown source current vshdn= 5v ishdn 200 ua shutdown pin threshold isource= 200ua vshdn 1.0 1.6 v vin= 7.5v, io= 50ma, shdn= +5.0v +150 mv output voltage at shutdown vout (shdn) -0.1 +0.1 v line regulation vline load regulation vload -150 shutdown vin vout ground drive gnd adjust simplified schematic
www.irf.com 3 OM8506SC, om8506sf vout = vref x (1+r1/1000) om8506 vout adj vin shdn gnd 100uf 16v tantalum 1.0uf ceramic x7r 220uf 6.3v tantalum adjust resistor r1 om8506 ripple rejection vs. frequency 0 20 40 60 80 100 120 100 1,000 10,000 100,000 1,000,000 frequency (hz) (db) 3a 1.5a .75a .50a in order to maintain regulation and stability speci- fied additional input and output bulk capacitors are recommended. capacitors recommended above should be low esr tantalums with tolerances of +/- 20% max. internal to the product are a 4.7uf input capacitor and a 4.7uf output capacitor in parallel with a 0.33uf ceramic capacitor. shutdown: the regulator can be shutdown by apply- ing a voltage >1.6v to pin 4. the regulator will restart when the shdn pin is pulled below the shutdown threshold of 1.0v. if remote shutdown is not required, pin 4 shold be connected to gnd to insure a safe ?off? state.
4 www.irf.com OM8506SC, om8506sf 1 2 3 4 5 base base: glidcop pins: copper core, alloy 52 seals: glass pin connections terminal description 1 vin 2 gnd 3 vout 4 shutdown 5 adjust base: 1010-1018 c.r.s. pins: #52 alloy, copper cored seals : glass ? 9013 or equiv. finish: 100-250 microinches electroless nickel over 50-250 microinches electrolytic nickel. pin connections terminal description 1,2 gnd 3 shutdown 4 adjust 5,6 vout 7,8 vin mechanical outline mo-078aa mechanical outline 8-lead flat pack 0.755 0.745 0.755 0.745 0.225 0.305 0.295 0.105 0.095 0.020 0.016 0.180 0.165 8x 0.040 0.065 0.040 0.065 8x 0.080 0.070 8x 0.110 0.150 1 2 3 4 8 7 6 5
www.irf.com 5 OM8506SC, om8506sf part number nomenclature om 8506 x x x omnirel device s=isolated package screening n=non-isolated test/inspection screening level mil-std-883 class h method pre seal burn-in optional 1030 nondestructive bond pull n/a 2023 internal visual 100% 2017 temperature cycle 100% 1010 constant acceleration 100% 2001 mechanical shock 100% 2002 pind n/a 2020 pre burn-in electrical optional burn-in 100% 1015 final electrical 100% seal 100% 1014 radiographic n/a 2012 external visual 100% 2009 mil-prf-38534 screening requirements part number package description screening OM8506SCp mo-078aa 5 - lead 100% final electrical OM8506SCh mo-078aa 5 - lead class h per mil-prf-38534 om8506sfp 8 -lead flat pack 100% final electrical om8506sfh 8 -lead flat pack class h per mil-prf-38534 world headquarters: 233 kansas st., el segundo, california 90245, tel: (310) 2527105 ir leominster: 205 crawford st., leominster, massachusetts 01453, tel: (978) 5345776 data and specifications subject to change without notice. 8/2002
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