3.3 - 65 3.3 three terminal +5v, +12v, +15v, low dropout to-257/to-258 fixed voltage regulators 4 11 r2supersedes 1 07 r1 7.5a, 5a, 3a, 1.5a low dropout fixed voltage positive regulators features ? +5v, +12v, and +15v output voltage ? operates down to 1v dropout ? .015% line regulation / .01% load regulation ? output voltage trimmed to 1% ? hermetic to-257 and to-258 isolated package description these three terminal positive fixed voltage regulators are designed to provide 7.5a, 5a, 3a, and 1.5a with higher efficiency than conventional voltage regulators. the devices are designed to operate to 1 volt input to output differential and the dropout voltage is specified as a function of load current. all devices are pin compatible with older three terminal regulators. supplied in the easy-to-use hermetic metal to-257 and to-258 jedec packages, these devices are ideally suited for military applications where small size, hermeticity and high reliability are required. absolute maximum ratings input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 v operating junction temperature range . . . . . . . . . . . . . . . . . . . . - 55c to + 150c storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65c to + 150c output current -om183-5, 12, 15sc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 a om184-5, 12, 15sc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 a om185-5, 12, 15st . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 a om186-5, 12, 15st . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 a note: om183sc and om184sc products are packaged in the to-258 package (7.5a & 5a).om185st and om186st products are packaged in the to-257 package (3a & 1.5a). part number designator om183-5sc omnirel output output package current voltage type om185-5, 12, 15stom186-5, 12, 15st om183-5, 12, 15scom184-5, 12, 15sc downloaded from: http:///
3.3 - 66 3.3 om183-5sc - om186-15st electrical characteristics (t c = 25c unless otherwise noted) parameter conditions min. typ. max. units output voltage om183/4/5/6 - 5 v i out = 0 ma, t j = 25c, v in = 8 v 4.95 5.0 5.05 v 0 i out i full load , 6.5 v v in 30 v 4.90 5.0 5.10 v om183/4/5/6 - 12 v i out = 0 ma, t j = 25c, v in = 15 v 11.88 12.0 12.12 v 0 i out i full load , 13.5 v v in 30 v 11.76 12.0 12.24 v om183/4/5/6 - 15 v i out = 0 ma, t j = 25c, v in = 20 v 14.85 15.0 15.15 v 0 i out i full load , 17.5 v v in 30 v 14.70 15.0 15.30 v line regulation om183/4/5/6 - 5 v i out = 0 ma, t j = 25c, 6.5 v v in 20 v 0.5 10 mv 1.0 10 mv 6.5 v v in 30 v 2.0 25 mv om183/4/5/6 - 12 v i out = 0 ma, t j = 25c, 13.5 v v in 25 v 1.0 25 mv 2.0 25 mv 13.5 v v in 30 v 4.0 60 mv om183/4/5/6 - 15 v i out = 0 ma, t j = 25c, 17.5 v v in 25 v 2.0 50 mv 4.0 50 mv 17.5 v v in 30 v 8.0 100 mv load regulation om183/4/5/6 - 5 v v in = 8 v, 0 i out i full load ,5 2 0 m v t j = 25c 10 35 mv om183/4/5/6 - 12 v v in = 15 v, 0 i out i full load ,1 2 3 6 m v t j = 25c 24 72 mv om183/4/5/6 - 15 v v in = 20 v, 0 i out i full load ,2 0 4 0 m v t j = 25c 40 100 mv current limit om183 - 5 v v in = 10 v 7.5 9.5 a om183 - 12 v v in = 17 v 7.5 9.5 a om183 - 15 v v in = 20 v 7.5 9.5 a om184 - 5 v v in = 10 v 5.0 6.5 a om184 - 12 v v in = 17 v 5.0 6.5 a om184 - 15 v v in = 20 v 5.0 6.5 a om185 - 5 v v in = 10 v 3.0 4.0 a om185 - 12 v v in = 17 v 3.0 4.0 a om185 - 15 v v in = 20 v 3.0 4.0 a om186 - 5 v v in = 10 v 1.5 1.8 a om186 - 12 v v in = 17 v 1.5 1.8 a om186 - 15 v v in = 20 v 1.5 1.8 a dropout voltage om183/4/5/6 - 5 v 3v out = 50 mv, i out = i full load 6.3 6.5 v om183/4/5/6 - 12 v 3v out = 120 mv, i out = i full load 13.3 13.5 v om183/4/5/6 - 15 v 3v out = 180 mv, i out = i full load 17.3 17.5 v quiescent current v in 30 v 5.0 10.0 ma thermal regulation t a = 25c, 30 ms pulse om183 - 5/12/15 v 0.002 0.01 %/w om184 - 5/12/15 v 0.003 0.015 %/w om185 - 5/12/15 v 0.004 0.02 %/w om186 - 5/12/15 v 0.008 0.04 %/w ripple rejection f = 120 hz, c out = 25 f tantalum i out = i full load om183/4/5/6 - 5 v v in = 8 v 63 db om183/4/5/6 - 12 v v in = 15 v 55 db om183/4/5/6 - 15 v v i n = 20 v 60 db temperature stability 0.5 % long term stability t a = 125c, 1000 hrs. 0.03 1.0 % rms output noise (% of v out )t a = 25c, 10 hz f 10 khz 0.003 % thermal resistance junction-to-case to-257aa 3.5 c/w to-258aa 2.75 c/w downloaded from: http:///
3.3 - 67 3.3 om183-5sc - om186-15st typical performance characteristics minimum input/output differential (v) 2 1 0 012345678910 output current (a) om183sc dropout voltage t j = 25 c output voltage deviation (% ) 0. 10 0. 05 0 -0. 05 -0. 10 -0. 15 -0. 20 -50 -25 0 25 50 75 100 125 150 temperature ( c) om183sc load regulation i = 7. 5a output voltage deviation (% ) 0. 10 0. 05 0 -0. 05 -0. 10 -0. 15 -0. 20 -50 -25 0 25 50 75 100 125 150 temperature ( c) om184sc load regulation i = 5a minimum input/output differential (v) 2 1 0 012 output current (a) om186st dropout voltage t j = 25 c output voltage deviation (% ) 0. 10 0. 05 0 -0. 05 -0. 10 -0. 15 -0. 20 -50 -25 0 25 50 75 100 125 150 temperature ( c) om185st load regulation i = 3a minimum input/output differential (v) 2 1 0 0 123456 output current (a) om184sc dropout voltage t j = 25 c minimum input/output differential (v) 2 1 0 01 234 output current (a) om185st dropout voltage t j = 25 c short circuit current (a) 12 10 8 6 4 2 0 5 0 101520253035 input/output differential (v) om183sc short circuit current t j = 150 c t j = -55 c i full load t j = 25 c short circuit current (a) 10 9 8 6 6 5 4 3 2 1 0 5 0 10 15 20 25 30 35 input/output differential (v) om184sc short circuit current t j = 25 c t j = -55 c i full load t j = 150 c short circuit current (a) 6 5 4 3 2 1 0 5 0 10 15 20 25 30 35 input/output differential (v) om185st short circuit current t j = 25 c t j = -55 c i full load t j = 150 c 0. 10 0. 05 0 -0. 05 -0. 10 -0. 15 -0. 20 -50 -25 0 25 50 75 100 125 150 temperature ( c) om186st load regulation i = 3a output voltage deviation (% ) short circuit current (a) 3. 0 2. 5 2. 0 1. 5 1 . 5 0 5 0 10 15 20 25 30 35 input/output differential (v) om186st short circuit current t j = 25 c t j = -55 c i full load t j = 150 c downloaded from: http:///
3.3 205 crawford street, leominster, ma 01453 usa (508) 534-5776 fax (508) 537-4246 om183-5sc - om186-15st .707.697 .750.500 .835.815 .695.685 .165.155 .200 typ. .550.530 .270.240 .045.035 .140 typ. .092 max. .065.055 .005 mechanical outline pin connection pin 1 - groundpin 2 - v out pin 3 - v in 123 pin connection 12 3 mechanical specifications p/n om183sc and om184sc jedec to-258aa p/n om185st and om186st jedec to-257aa mechanical outline this family of three terminal regulators is easy to use and has all the protection features that are expected in highperformance voltage regulators. they are short circuit protected, have safe area protection as well as thermal shutdown to turn off the regulator should the temperature exceed about 165c. these regulators offer lower dropout voltage and more precise reference tolerance. further, the reference stabilitywith temperature is improved over older types of regulators. the only circuit difference between using this family and older regulators is that they require an output capacitor for stability. overload recoverywhen power is first turned on, as the input voltage rises, the output follows the input, allowing the regulator to startup into very heavy loads. during the start-up, as the input voltage is rising, the input-to-output voltage differential remains small, allowing the regulator to supply large output currents. with high input voltage, a problem can occur wherein removal of an output short will not allow the output voltage to recover. older regulators, such as the 7800 series, also exhibited this phenomenon, so it is not unique to the om183-5. the problem occurs with a heavy output load when the input voltage is high and the output voltage is low, such asimmediately after a removal of a short. the load line for such a load may intersect the output current curve at two points. if this happens, there are two stable output operating points for the regulator. with this double intersection, the power supply may need to be cycled down to zero and brought up again to make the output recover. thermal conditionsthis series of regulators has internal power and thermal limiting circuitry designed to protect the device underoverload conditions. for continuous normal load conditions however, maximum junction temperature ratings must not be exceeded. it is important to give careful consideration to all sources of thermal resistance from junction to ambient. this includes junction to case, case to heat sink interface, and heat sink resistance itself. new thermal resistance specifications have been developed to more accurately reflect device temperature and ensure safe operating temperatures. the data section for these new regulators provides a separate thermal resistance and maximum junction temperature for both the control section and the power transistor. previous regulators, with a single junction to case thermal resistance specification, used anaverage of the two values provided here and therefore could allow excessive junction temperature under certain conditions of ambient temperature and heat sink resistance. to avoid this possibility, calculations should be made for both sections to ensure that both thermal limits are met. junction-to-case thermal resistance is specified from the ic junction to the bottom of the case directly below the die.this is the lowest resistance path for heat flow. proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. thermal compound at the case-to-heat-sink interface is strongly recommended. if the case of the device must be electrically isolated, a thermally conductive spacer can be used, as long as its added contribution to thermal resistance is considered. note that the case of all devices in this series is electrically connected to the output. application notes .430.410 .200.190 .038 max. .005 .120 typ. .537.527 .665.645 .420.410 .150.140 .750.500 .100 typ. .035.025 .045.035 pin 1 - groundpin 2 - v out pin 3 - v in downloaded from: http:///
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