3.3 - 97 3.3 three terminal, fixed voltage, 1 amp low dropout voltage regulator in hermetic jedec to-257aa package 4 11 r1 supersedes 3 02 r0 0.5 volt low dropout positive fixed voltage regulator approved to desc drawing features ? similar to industry standard lm2940 ? approved to desc standardized military drawing ? dropout voltage typically 0.5 v @ i o = 1 a ? output current in excess of 1 a ? reverse battery protection ? internal short circuit protection ? isolated hermetic package description these three terminal fixed voltage regulators are designed to provide 1.0a with high efficiency. it has the ability to source 1a of output current with a typical dropout voltage of .5v and a maximum of 1v over the entire temperature range. it is supplied in the hermetic to-257 package and is ideally suited for military applications where small size and high reliability is required. absolute maximum ratings input voltage .......................................................... 26vdc output voltage ............................................. +5v, +12v, +15vdc operating junction temperature range ........................- 55c to + 125c storage temperature range ..................................- 65c to + 150c lead temperature (soldering 10 seconds) ................................ 300c thermal resistance: q jc (isolated) ...................................................... 4.2c/w q ja ............................................................... 42c/w maximum output current ................................................ 1.3 a om2940stm part number designator standard military drawing number omnirel part number 5962-8958710mux om2940-5stm 5962-9088401mux om2940-12stm 5962-9088501mux om2940-15stm downloaded from: http:///
3.3 - 98 3.3 om2940stm electrical characteristics, p/n om2940-12 (12 volt) test conditions are -55c t a 125c, v in = 17 v, i o = 1 a, c out = 22 f (unless otherwise specified). parameter symbol test conditions notes min. max. unit output voltage v out v in = 17 v, i out = 5 ma 1 11.64 12.36 2 11.40 12.60 v v in = 13.6 v, i out = 5 ma 1 11.64 12.36 2 11.40 12.60 v in = 14 v, i out = 5 ma 1 11.64 12.36 2 11.40 12.60 v in = 26 v, i out = 5 ma 1 11.64 12.36 2 11.40 12.60 v in = 17 v, i out = 1 a 1 11.64 12.36 2 11.40 12.60 v in = 13.6 v, i out = 1 a 1 11.64 12.36 2 11.40 12.60 v in = 13.6 v, i out = 50 ma 1 11.64 12.36 2 11.40 12.60 v in = 17 v, i out = 50 ma 1 11.64 12.36 2 11.40 12.60 maximum line transient v lt v o 13 v, r o = 100 , t = 20 ms 1, 2 40 v reverse polarity v rin r o = 100 1, 2 -15 v input voltage dcreverse polarity v rit r o = 100 , t =20 ms 1, 2 -45 v input voltage transient quiescent current i q v in = 17 v, i out = 5 ma 11 5 ma 22 0 v in = 14 v, i out = 5 ma 11 5 22 0 v in = 26 v, i out = 5 ma 11 5 22 0 v in = 17 v, i out = 1 a 15 0 26 0 line regulation v rln 14 v v in 26 v, 1 75 mv i out = 5 ma 2 120 load regulation v rld v in = 17 v, 50 ma i out 1 a 1 120 mv 2 190 dropout voltage v do i out = 1 a 1. 7 v 21 i out = 100 ma 1 150 mv 2 200 output noise voltage v on v in = 17 v, i o = 5 ma, 1 1000 v rms 10 hz - 100 hz output impedance r o v in = 17 v, i out = 100 ma dc 1, 2 1 and 20 ma ac, f o = 120 hz short circuit current i os v in = 17 v 1 1.6 a 2 1.3 ripple rejection r r v in = 17 v + 1 v rms, 1 52 db i out = 5 ma, f = 1 khz 2 46 notes: 1. t a = 25c . 2. over full operating temperature range. electrical characteristics, p/n om2940-5 (5 volt) test conditions are -55c t a 125c, v in = 10 v, i o = 1 a, c out = 22 f (unless otherwise specified). parameter symbol test conditions notes min. max. unit output voltage v out v in = 10 v, i out = 5 ma 1 4.85 5.15 2 4.75 5.25 v v in = 6 v, i out = 5 ma 1 4.85 5.15 2 4.75 5.25 v in = 7 v, i out = 5 ma 1 4.85 5.15 2 4.75 5.25 v in = 26 v, i out = 5 ma 1 4.85 5.15 2 4.75 5.25 v in = 10 v, i out = 1 a 1 4.85 5.15 2 4.75 5.25 v in = 6 v, i out = 1 a 1 4.85 5.15 2 4.75 5.25 v in = 6 v, i out = 50 ma 1 4.85 5.15 2 4.75 5.25 v in = 10 v, i out = 50 ma 1 4.85 5.15 2 4.75 5.25 maximum line transient v lt v o 6 v, r o = 100 , t = 20 ms 1, 2 40 v reverse polarity v rin r o = 100 1, 2 -15 v input voltage dcreverse polarity v rit r o = 100 , t =20 ms 1, 2 -45 v input voltage transient quiescent current i q v in = 10 v, i out = 5 ma 11 5 ma 22 0 v in = 7 v, i out = 5 ma 11 5 22 0 v in = 26 v, i out = 5 ma 11 5 22 0 v in = 10 v, i out = 1 a 15 0 2 100 line regulation v rln 7 v v in 26 v, 1 40 mv i out = 5 ma 2 50 load regulation v rld v in = 10 v, 50 ma i out 1 a 1 50 mv 2 100 dropout voltage v do i out = 1 a 1. 7 v 21 i out = 100 ma 1 150 mv 2 200 output noise voltage v on v in = 10 v, i o = 5 ma, 1, 2 700 v rms 10 hz - 100 hz output impedance r o v in = 10 v, i out = 100 ma dc 1, 2 1 and 20 ma ac, f o = 120 hz short circuit current i os v in = 10 v 1 1.5 a 2 1.3 ripple rejection r r v in = 10 v + 1 v rms, 1 60 db i out = 5 ma, f = 1 khz 2 50 notes: 1. t a = 25c . 2. over full operating temperature range. downloaded from: http:///
3.3 - 99 3.3 om2940stm electrical characteristics, p/n om2940-15 (15volt) test conditions are -55c t a 125c, v in = 20 v, i o = 1 a, c out = 22 f (unless otherwise specified). parameter symbol test conditions notes min. max. unit output voltage v out v in = 20 v, i out = 5 ma 1 14.55 15.45 2 14.25 15.75 v v in = 16.75 v, i out = 5 ma 1 14.55 15.45 2 14.25 15.75 v in = 17 v, i out = 5 ma 1 14.55 15.45 2 14.25 15.75 v in = 26 v, i out = 5 ma 1 14.55 15.45 2 14.25 15.75 v in = 20 v, i out = 1 a 1 14.55 15.45 2 14.25 15.75 v in = 16.75 v, i out = 1 a 1 14.55 15.45 2 14.25 15.75 v in = 16.75 v, i out = 50 ma 1 14.55 15.45 2 14.25 15.75 v in = 20 v, i out = 50 ma 1 14.55 15.45 2 14.25 15.75 maximum line transient v lt v o 16 v, r o = 100 , t = 20 ms 1, 2 40 v reverse polarity v rin r o = 100 1, 2 -15 v input voltage dcreverse polarity v rit r o = 100 , t =20 ms 1, 2 -45 v input voltage transient quiescent current i q v in = 20 v, i out = 5 ma 11 5 ma 22 0 v in = 17 v, i out = 5 ma 11 5 22 0 v in = 26 v, i out = 5 ma 11 5 22 0 v in = 20 v, i out = 1 a 15 0 26 0 line regulation v rln 17 v v in 26 v, 1 95 mv i out = 5 ma 2 150 load regulation v rld v in = 20 v, 50 ma i out 1 a 1 150 mv 2 240 dropout voltage v do i out = 1 a 1. 7 v 21 i out = 100 ma 1 150 mv 2 200 output noise voltage v on v in = 20 v, i o = 5 ma, 1 1000 v rms 10 hz - 100 hz output impedance r o v in = 20 v, i out = 100 ma ac 1, 2 1 and 20 ma dc, f o = 120 hz short circuit current i os v in = 20 v 1 1.6 a 2 1.3 ripple rejection r r v in = 20 v + 1 v rms, 1 48 db i out = 5 ma, f = 1 khz 2 42 notes: 1. t a = 25c . 2. over full operating temperature range. 123 tab pin 1: v in pin 2: gnd pin 3: v out tab: isolated pin connection .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 notes ? case is metal/hermetically sealed ? isolated tab front view downloaded from: http:///
3.3 205 crawford street, leominster, ma 01453 usa (508) 534-5776 fax (508) 537-4246 typical applications om2940stm 0. 9 inout - output differential (v) 0 output current (ma) dropout voltage t j = 25 c 200 1000 800 600 400 0. 8 0. 7 0. 6 0. 5 0. 4 0. 3 0. 2 0 0. 1 1. 0 dropout voltage (v) -40 temperature ( c) dropout voltage vs temperature 1 a 0 160 120 40 0. 9 0. 8 0. 7 0. 6 0. 5 0. 4 0. 3 0. 2 0. 1 0 80 500 ma 100 ma 5. 10 output voltage (5v) -40 temperature ( c) output voltage vs temperature 0 160 120 40 5. 08 5. 06 5. 04 5. 02 5. 00 4. 98 4. 96 4. 94 4. 92 4. 90 80 30 -10 time ( s) line transient response 0 0v 20 10 0 -10 -20 -30 3v output voltage deviation (mv) input voltage change (v) 10 20 30 40 50 60 200 quiescent current (ma) 0 input voltage (v) quiescent current 1 a 180 160 140 120 100 80 60 40 20 0 500 ma 100 ma 5 101520253035 50 quiescent current (ma) temperature ( c) quiescent current vs temperature v in = v out +5v 0 40 30 20 10 -40 0 160 120 40 80 1 a 500 ma 10 ma 50 quiescent current (ma) 0 load current (a) quiescent current 0. 2 1. 0 0. 8 0. 4 40 30 20 10 0 0. 6 v in = 14v v out = 5v t j = 25 c 95 ripple rejection (db) 1 frequency (hz) ripple rejection 10 100k 10k 100 35 1k 1m 45 55 65 75 85 v in = 10v c out = 22 f i out = 10ma v out =5v 0. 5 -10 time ( s) load transient response 04 0 30 10 0 20 0. 4 0. 3 0. 2 0. 1 0 -0. 1 -0. 2 -0. 3 -0. 4 -0. 5 1. 0 0. 5 output voltage deviation (v) load current change (a) v in = 10v, c out = 22 f t j = 25 c, v out =5v downloaded from: http:///
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