OM9550SF rev.01 omnirel llc 205 crawford street, leominster, ma 01453 usa 08/19/99 www.omnirel.com (978) 534-5776 fax (978) 537-4246 preliminary specification 10a, 5v to 3.3v switching regulator hermetic package description the OM9550SF is ideally suited for on-board power regulation applications where small size and high efficiency are required. this part contains all input and output capacitance typically necessary and will only require one additional component (inductor) to provide a complete 33w low voltage regulator. it is provided in a hi- rel f-12a package and is intended for hermetic applications requiring high power density and light weight. maximum ratings @ ta=25 c (unless otherwise specified) parameter value conditions input voltage 6v output current 12a short circuit power dissipation 4.6w io=10a thermal resistance tbd output power 36w short circuit lead temp. 300 c package pinout pin 7 pin 1 features ? high efficiency ? internal short circuit protection ? high power density ? hi- rel screening available ? hermetic package applications ? high power 5v to 3.3v regulation ? dsp controllers ? embedded processor power ? general purpose low voltage logic supply +vout +vout +vin n/c +vin n/c gnd gnd l1 l1 l1 l1
OM9550SF rev.01, 08/19/99 omnirel llc 205 crawford street, leominster, ma 01453 usa www.omnirel.com (978) 534-5776 fax (978) 537-4246 performance characteristics (ta= 25 c) input parameter symbol test conditions min max units line regulation rline 4.5v vin 5.5v -0.5 +0.5 % input voltage range vin 4.5 5.5 v input filtering 1 220 uf output parameter symbol test conditions min typ max units power po vo= 3.3v 33 w vout accuracy ? ? ? ? vo 0.8 tbd % vout regulation vreg vin= 5v, 0.1a io 10a 0.3 tbd % output ripple v vin= 5v, io= 10a 80 tbd mv(p-p) current limiting ilim vin= 5v 12 a efficiency vin= 5v, io= 10a tbd 87 % min. load current il(min) 0.1 a short circuit prot. direct short to ground output current foldback to 2a dynamic parameter test conditions min typ max units transient response 50% load step ? ? ? ? vout 40 200 us mv frequency -55 to 125 c 175 200 225 khz environmental parameter test conditions min max units operating temperature -55 125 degs. c storage temp. -55 150 degs. c physical specifications parameter test conditions typ units pin composition case size length 1.30 in width 1.0 in height 0.305 in 1 included in the package
OM9550SF rev 01, 08/19/99 omnirel llc 205 crawford street, leominster, ma 01453 usa www.omnirel.com (978) 534-5776 fax (978) 537-4246 mechanical outline- f12a package
OM9550SF rev.01, 08/19/99 omnirel llc 205 crawford street, leominster, ma 01453 usa www.omnirel.com (978) 534-5776 fax (978) 537-4246 application circuit notes: 1. l1 should be a 1.5uh, 15a (rms), 25a (sat), (coilcraft # do5022p-152hc ) or equivalent. 2. 0.1 uf caps. are not required. they are suggested for additional emi filtering if necessary. OM9550SF 7,8 1,2 3,4 5,6 11,12 0.1uf 0.1uf com com vin(+4.5- 5.5) vout(+) l1
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