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www.irf.com 1 description 5.0 watts output power available in 5, 12 and 15 volt outputs 16- 40 vdc input range (28 vdc nominal) total ionizing dose > 25 krads(si) see hardened to let up to 60 mev . cm 2 /mg -55c to +125c operating range indefinite short circuit protection flexible mounting fully isolated - input to output and to case complimentary emi filter available electrical performance similar to asa28xxd series standard microcircuit drawings available features ama 28v input, dual output the ama28xxd series of dc-dc converter modules has been specifically designed for operation in moderate radiation environments supplementing the higher radiation performance available in the international rectifier art2815t converter series. environments presented to space vehicles operating in low earth orbits, launch boosters, orbiting space stations and similar applications requiring a low power, high performance converter with moderate radiation hardness performance will be optimally served by the ama28xxd series. the ama28xxd has been designed for high density using chip and wire hybrid technology that complies with the class h requirements of mil-prf-38534.

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% applicable generic lot qualification test data including radiation performance can be made available on request. variations to the standard screening can be accomodated. consult ir san jose for special requirements. ama28xxd series the physical configuration of the ama28xxd series permits mounting directly to a heat conduction surface without the necessity of signal leads penetrating the heat sink surface. this package configuration permits greater independence in mounting and more mechanical security than traditional packages. international rectifier?s rugged ceramic seal pins are used exclusively in the package thereby assuring long term hermeticity. hybrid - high reliability radiation tolerant dc-dc converter pd-94692f
2 www.irf.com ama28xxd series specifications for notes to specifications, refer to page 4 static characteristics -55c t case +125c, v in = 28v dc 5%, c l = 0, unless otherwise specified. input voltage range -0.5v to +50vdc (continuous), input voltage range +16v to +40vdc 80v (100ms) output power less than or equal to 5w soldering temperature 300c for 10 seconds operating case temperature -55c to +125c storage case temperature -65c to +135c recommended operating conditions absolute maximum ratings parameter group a subgroups test conditions min nom max unit input voltage 16 28 40 v output voltage ama2805d ama2812d ama2815d ama2805d ama2812d ama2815d 1 1 1 2, 3 2, 3 2, 3 vin = 28 volts, 20% load on both outputs 4.95 11.88 14.85 4.90 11.76 14.70 5.00 12.00 15.00 5.05 12.12 15.15 5.10 12.24 15.30 v output current 1, 2 ama2805d ama2812d ama2815d 1, 2, 3 1, 2, 3 1, 2, 3 vin = 16, 28, 40 volts each output each output each output 200 83 67 800 333 267 ma output power 1, 2 1, 2, 3 vin = 28 volts, 100% load 5.0 w output ripple voltage 1, 3 ama2805d ama2812d ama2815d 1, 2, 3 1, 2, 3 1, 2, 3 vin = 16, 28, 40 volts 100% load bw = 20 hz to 2 mhz 200 200 290 mv pp output voltage regulation 3 line ama2805d ama2812d ama2815d load ama2805d ama2812d ama2815d 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 v in = 16, 28, 40 volts iout = 10, 50%, 100% load 10 10 10 10 10 10 25 50 50 50 50 50 mv
www.irf.com 3 ama28xxd series static characteristics (continued) -55c t case +125c, v in = 28v dc 5%, c l = 0, unless otherwise specified. for notes to specifications, refer to page 4 parameter group a subgroups test conditions min nom max unit cross regulation 5 ama2805d ama2812d ama2815d 1, 2, 3 1, 2, 3 1, 2, 3 minimum 1.0 watt on both outputs 20%-80% load 15 8.0 8.0 % input current no load inhibit 1, 2, 3 1, 2, 3 vin=28v, iout=0, inhibit (pin 5)=open inhibit (pin 5) shorted to input return (pin 7) 35 60 12 ma input ripple current 3 ama2805d ama2812d ama2815d 1, 2, 3 1, 2, 3 1, 2, 3 vin = 16, 28, 40 volts, 100% load, bw = 20 hz to 2 mhz 100 100 100 ma pp efficiency 3 ama2805d ama2812d ama2815d ama2805d ama2812d ama2815d 1, 3 1, 3 1, 3 2 2 2 100% load 66 71 71 60 68 68 % isolation 1 input to output or any pin to case (except pin 8) at 500vdc 100 m ? capacitive load 5, 6 ama2805d ama2812d ama2815d 4 4 4 no effect on dc performance, total for both outputs 500 200 200 f short circuit power dissipation 1, 2, 3 4.0 w mtbf mil-hdbk-217f, sf @ 70oc 750 khrs weight 32 g
4 www.irf.com ama28xxd series dynamic characteristics -55c t case +125c, v in = 28v dc 5%, c l = 0, unless otherwise specified. notes to specifications 1. applicable to positive and negative outputs. 2. maximum combined output is 5.0 watts. 4.0 watts (max.) is available from either output (80%). 3. load current split equally between +v out and ?v out . 4. 1.0 watt load on output under test, 1.0 watt to 4.0 watt load change on other output. 5. capacitive value may be any value from 0 to the maximum limit without compromising dc performance. a capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. 6. parameter shall be tested as part of design characterization and after design or process changes. thereafter, parameters shall be guaranteed to the limit specified. 7. load step transition time between 2 and 10 microseconds. 8. recovery time is measured from initiation of the transient to where v out has returned to within 1% of v out at 50% load. 9. input step transient time between 1 and 10 microseconds. 10. turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin while power is applied to the input. parameter group a subgroups test conditions min nom max unit short circuit recovery 6 4, 5, 6 0% load to 100% load 25 ms switching frequency 3 4, 5, 6 100% load 500 550 600 khz output response to step transient load changes 3, 7 4, 5, 6 4, 5, 6 load step 50% 100% load step 0% 50% -400 -800 +400 +800 mv pk recovery time, step transient load changes 3, 7, 8 4, 5, 6 4, 5, 6 load step 50% 100% load step 0% 50% 100 2000 s output response transient step line changes 3, 6, 9 ama2805d ama2812d ama2815d 4, 5, 6 4, 5, 6 4, 5, 6 input step 16 40vdc, 100% load -550 -750 -750 +550 +750 +750 mv pk recovery time transient step line changes 3, 6, 9 4, 5, 6 input step 16 ? 40vdc, 100% load 1200 s turn on overshoot 3, 10 4, 5, 6 4, 5, 6 0% load 100% load 600 400 mv pk turn on delay 3, 10 4, 5, 6 0% load to 100% load 25 ms
www.irf.com 5 ama28xxd series block diagram application information inhibit function connecting the inhibit input (pin 5) to input common (pin 7) will cause the converter to shut down. it is recommended that the enable pin be driven by an open collector device capable of sinking at least 400 a of current. the open circuit voltage of the inhibit input is 10 +1.0 v dc an optional emi filter is available (asf461 or afh461) will reduce the input ripple current to levels below the limits imposed by mil-std-461 ce03. emi filter thermal considerations irrespective of the fact that the ama28xxd series of converters are relatively low power devices and are designed to provide efficient voltage conversion, there will be some heat generated during normal operation. to avoid a continuous thermal rise that may eventually exceed the maximum case temperature rating and to maintain a safe operating environment for the internal components, these converters should be attached to a heat conducting surface allowing a continuous flow of the heat away from the base plate. this becomes more important when operating in the near vacuum environment of space which provides no alternate heat radiating path. radiation specification international rectifier currently does not have a dla certified radiation hardness assurance program.

parameter condition min typ max unit total ionizing dose mil-std-883, method 1019.4 operating bias applied during exposure 25 ? ? krads (si) heavy ion (single event effects) bnl dual van de graf generator 60 ? ? mev ? cm 2 /mg
6 www.irf.com ama28xxd series pin designation mechanical outline pin # designation 1 + output 2 output return 3 - output 4 blank 5 inhibit 6 + input 7 input return 8 case ground 0.25 typ 1.130 1.130
1.38 1.63 0.80 0.165 0.40 0.20 0.25 typ 0.88
0.170

www.irf.com 7 ama28xxd series part numbering standard microcircuit drawing equivalence table standard microcircuit ir standard drawing number part number 5962-04250 ama2812d 5962-04251 ama2815d ama 28 05 d /em model input voltage output s = single d = dual output voltage 05 = 5v 12 = 12v 15 = 15v screening level 28 = 28v (please refer to screening table) no suffix, ch, em device screening requirement mil-std-883 method no suffix ch em temperature range -55c to +125c -55c to +125c -55c to +85c element evaluation mil-prf-38534 class h class h n/a non-destructive bond pull 2023 n/a n/a n/a internal visual 2017 yes yes temperature cycle 1010 cond c cond c cond c constant acceleration 2001, y1 axis 3000 gs 3000 gs 3000 gs pind 2020 cond a cond a n/a 320 hrs @ 125c 320 hrs @ 125c 48 hrs @ 125c ( 2 x 160hrs ) ( 2 x 160hrs ) final electrical mil-prf-38534 -55c, +25c, -55c, +25c, -55c, +25c, ( group a ) & specification +125c +125c +85c pda mil-prf-38534 2% 2% n/a seal, fine and gross 1014 cond a, c cond a, c cond a radiographic 2012 yes yes n/a external visual 2009 yes yes burn-in 1015 notes: best commercial practice. device with ?/ch? suffix is a dla class h compliant without radiation performance. no suffix is a radiation rated device but not available as a dla qualified smd per mil-prf-38534. international rectifier currently does not have a dla certified radiation hardness assurance program. world headquarters: 101 n sepulveda blvd, el segundo, california 90245, tel: (310) 252-7105 ir san jose: 2520junction avenue, san jose, california 95134, tel: (408) 434-5000 visit us at www.irf.com for sales contact information . data and specifications subject to change without notice. 12/2014

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