3.3 - 21 3.3 three terminal, precision adjustable negative voltage regulator in hermetic style packages (lm137a) 4 11 r2 supersedes 1 07 r1 1.5 amp negative adjustable voltage regulator approved to desc drawing 7703406 om1325stm om1325n2m om1325nmm OM1325NTM om1325smm om1325nkm features ? similar to industry standard lm137a ? approved to desc standardized military drawing number 7703406 ? built in thermal overload protection ? short circuit current limiting ? available in six package styles ? maximum output voltage tolerance is guaranteed to + 1% description these three terminal negative regulators are supplied in hermetically sealed packages. all protective features are designed into the circuit, including thermal shutdown, current-limiting, and safe-area control. with heat sinking, these devices can deliver up to 1.5 amps of output current. the lcc-20 device is limited to .5 amps. the unit also features output voltages that can be fixed from -1.2 volts to -37 volts using external resistors. absolute maximum ratings t c @ 25c power dissipation case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 w case-all others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 w input - output voltage differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 v operating junction temperature range . . . . . . . . . . . . . . . . . . . . . - 55c to + 150c storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65c to + 150c lead temperature (soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . 300c thermal resistance, junction to case: case 2, lcc-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17c/w case u & m, to-257 (isol) and smd-3 . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2c/w case t&n, to-257 (non-isol) and smd-1 . . . . . . . . . . . . . . . . . . . . . . . 3.5c/w case y, to-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0c/w maximum output current: case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 a case-all others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5a recommended operating conditions: output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1.2 to -37 vdc ambient operating temperature range (t a ). . . . . . . . . . . . . . . . - 55c to + 125c input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4.25 to -41.25 vdc please see mechanical outlines herein
3.3 - 22 3.3 OM1325NTM, om1325stm, om1325nkm, om1325smm, om1325nmm, om1325n2m parameter symbol test conditions min. max. unit reference voltage v ref v diff = 3.0v, t a = 25c -1.262 -1.238 v diff = 3.0v ? -1.280 -1.220 v v diff = 40v ? -1.280 -1.220 line regulation r line 3.0 v v diff 40v, t a = 25c -4.5 4.5 (note 1) 3.0v v diff 40v ? -13.8 13.8 mv load regulation r load v diff = 5v, 8ma i l 1.5a ? -25 25 (note 1) v diff = 12v, 8ma i l 1.5a, t a = 25c -25 25 mv v diff 40v, 8ma i l 1.5a, t a = 25c -25 25 v diff = 40v, 8ma i l 1.5a ? -50 50 thermal regulation v rth v in = -14.6v, i l = 1.5a -5 5 mv p d = 20 watts, t = 10 ms, t a = 25c ripple rejection r n f = 120 hz, v out = v ref ? 66 db (note 2) c adj = 10 f adjustment pin current i adj v diff = 3.0v ? 100 v diff = 40v ? 100 a adjustment pin 3i adj current change (line) 3v v diff 40v ? -5 5 a 3i adj (load) v diff = 5v, 8ma i l 1.5a ? -5 5 a miminum load current i lmin v diff = 3.0v, v out = -1.4v (forced) ? 3.0 v diff = 10v, v out = -1.4v (forced) ? 3.0 ma v diff = 40v, v ou t = -1.4v (forced) ? 5.0 current limit i cl v diff 5v ? 1.5 3.5 (note 2) v diff = 40v, t a = 25c 0.24 1.2 a notes: 1. load and line regulation are specified at a constant junction temperature. pulse testing with low duty cycle is used. changes in output voltage due to heating effects must be taken into account separately. 2. if not tested, shall be guaranteed to the specified limits. 3. the ? denotes the specifications which apply over the full operating temperature range. part number designator standard military drawing number omnirel part number omnirel package designation 7703406m om1325smm smd-3 7703406u om1325stm to-257 (isolated) 7703406t OM1325NTM to-257 (non-isolated) 7703406y om1325nkm to-3 7703406n om1325nmm smd-1 77034062 om1325n2m lcc-20 electrical characteristics -55c t a 125c, i l = 8ma (unless otherwise specified) OM1325NTM, om1325stm, om1325nkm, om1325smm, om1325nmm
3.3 - 23 3.3 parameter symbol test conditions min. max. unit reference voltage v ref v diff = 3.0v, t a = 25c -1.262 -1.238 v diff = 3.0v ? -1.280 -1.220 v v diff = 40v ? -1.280 -1.220 line regulation r line 3.0 v v diff 40v, t a = 25c -4.5 4.5 (note 1) 3.0v v diff 40v ? -13.8 13.8 mv load regulation r load v diff = 5v, 8ma i l 200 ma ? -25 25 (note 1) v diff = 15v, 8ma i l 200m, at a = 25c -25 25 mv v diff 40v, 8ma i l 150 ma, at a = 25c -25 25 v diff = 40v, 8ma i l 50 ma ? -50 50 thermal regulation v rth v in = -16.25v, i l =330 ma -5 5 mv p d =5 watts, t = 10 ms, t a = 25c ripple rejection r n f = 120 hz, v out = v ref ? 66 db (note 2) c adj = 10 f adjustment pin current i adj v diff = 3.0v ? 100 v diff = 40v ? 100 a adjustment pin 3i adj current change (line) 3v v diff 40v ? -5 5 a 3i adj (load) v diff = 5v, 8ma i l 500 ma ? -5 5 a miminum load current i lmin v diff = 3.0v, v out = -1.4v (forced) ? 3.0 v diff = 10v, v out = -1.4v (forced) ? 3.0 ma v diff = 40v, v ou t = -1.4v (forced) ? 5.0 current limit i cl v diff 5v ? 0.5 1.8 (note 2) v diff = 40v, t a = 25c 0.15 0.65 a notes: 1. load and line regulation are specified at a constant junction temperature. pulse testing with low duty cycle is used. changes in output voltage due to heating effects must be taken into account separately. 2. if not tested, shall be guaranteed to the specified limits. 3. the ? denotes the specifications which apply over the full operating temperature range. OM1325NTM, om1325stm, om1325nkm, om1325smm, om1325nmm, om1325n2m *c in is required if regulator is located more than 4 inches from power supply filter. a 1 f solid tantalum or 10 f aluminum electrolytic is recommended. ** c o is necessary for stability. a 1 f solid tantalum or 10 f aluminum electrolytic is recommended. v out = -1.25 v (1 +r 2 ) r 1 om1325stm 1.0f 1.0f -v in -v out v out v in i adj i prog c in *c o ** r 2 r 1 120 + + typical application electrical characteristics -55c t a 125c, i l = 8ma (unless otherwise specified) om1325n2m
3.3 205 craw ford street, leominster, ma 01453 usa (508) 534-5776 fax (508) 537-4246 OM1325NTM, om1325stm, om1325nkm, om1325smm, om1325nmm, om1325n2m om1325smm front view pin 1 - adjust pin 2 - output pin 3 - input case - isolated om1325stm OM1325NTM isolated non-isolated front view front view pin 1 - adjust pin 1 - adjust pin 2 - input pin 2 - input pin 3 - output pin 3 - output tab - isolated tab - input om1325nmm pin 1 - adjust pin 2 - output pin 3 - input om1325nkm pin 1 - adjust pin 2 - output case - input om1325n2m pin 1 v out pin 11 vin pin 2 v out (sense) pin 12 nc pin 3 nc pin 13 nc pin 4 nc pin 14 nc pin 5 nc pin 15 nc pin 6 nc pin 16 adjust pin 7 nc pin 17 nc pin 8 nc pin 18 nc pin 9 nc pin 19 nc pin 10 nc pin 20 nc for additional information please see the mechanical outline section. .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 mechanical outline .425 .200 .100 .350 min. .080 .160 .020 ?.020 .035 wide flat 3 plcs. .115 .425 .140 .415 .157 .015 .140 .140 .075 .075 .062 .375 .030 min. .075 ( .010) typ. .040 .020 x45 ref. .040 x45 ref (3 pl) .010 .160 sq. ref. .065 .009 r. 20 plcs. 3 1 19 18 14 4 13 9 .003 .050 typ. .050 ( .005) typ. .085 .025 sq. typ. ( .003) .025 typ. 12 3 1 2 3 1 2 3 1.197 1.177 0.675 0.655 0.188 r. max. 0.440 0.420 0.161 0.151 0.525 r. max. 0.225 0.205 seating plane 0.312 min. 0.450 0.250 0.043 0.038 2 plcs. 0.135 max. 0.875 max. 1.53 ref. 2 1
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