absolute maximum ratings symbol parameter value units i o output current 3.5 a v in input voltage +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 low dropout om8500sc linear regulator OM8500SF hermetic package +3.3vin to +1.8vout at 3.0a www.irf.com 1 features: n low dropout of 1.1 volts significantly re- duces 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 om8500 is a low dropout linear regulator designed specifically for high reliability applications. housed in ei- ther a 5 pin through hole or 8 lead surface mount pack- age, these regulators provide high reliability in military/ defense applications. the low dropout voltage of 1.1v @ 3a makes the part particularly useful for applications re- quiring low noise and higher efficiency. mo-078aa pd-94465a 8/20/02 product summary part number i o vin vout package om8500sc 3.0a 3.3v 1.8v mo-078aa OM8500SF 3.0a 3.3v 1.8v 8-lead flatpack
2 www.irf.com om8500sc, OM8500SF electrical characteristics @ t a = 25c (unless otherwise specified) electrical characteristics t a = -55 to +125c shutdown vin vout ground drive gnd parameter conditions symbol min. typ. max unit output voltage vin= 3.3v, io= 3.0a vout 1.782 1.8 1.818 v input voltage range- operating io= 3.0a 2.9 6.5 v 3.13 vin 3.46, io= 3.0a -100 +100 mv 2.9 vin 3.8, io= 50ma -5 +5 mv vin= 3.3v 10ma iout 3.0a dropout voltage io= 3.0a. vout= 1.8v vdrop 1.1 v current limit vin= 3.3v, 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= 3.3v, 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 output voltage vin= 3.3v, io= 3.0a vout 1.71 1.8 1.89 v input voltage range- operating io= 3.0a 2.9 6.5 v 3.13 vin 3.46, io= 3.0a -150 +150 mv 2.9 vin 3.8, io= 50ma -150 +150 mv vin= 3.3v 10ma iout 3.0a dropout voltage io= 3.0a. vout= 1.8v vdrop 1.1 v current limit vin= 3.3v,overcurrent latchup ilatch 3 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 1.6 v vin= 3.3v, 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 simplified schematic
www.irf.com 3 om8500sc, OM8500SF om8500 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 220uf 6.3v tantalum om8500 vout vin shdn gnd 100uf 16v tantalum 1.0uf ceramic x7r vin vout ground 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 ap- plying a voltage >1.6v to pin 4. the regulator will restart when the shdn pin is pulled below the shut- down 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 om8500sc, OM8500SF 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 no connection 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 no connection 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 om8500sc, OM8500SF part number nomenclature om 9800 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 om8500scp mo-078aa 5 - lead 100% final electrical om8500sch mo-078aa 5 - lead class h per mil-prf-38534 OM8500SFp 8 -lead flat pack 100% final electrical OM8500SFh 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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