3.3 - 75 3.3 om1840nkm 1 08 r3 supersedes 4 11 r2 5 amp low dropout positive adjustable regulator approved to desc drawing 5962-89521 features similar to industry standard lt1084 approved to desc standardized military drawing number 5962-89521 adjustable output voltage built in thermal overload protection short circuit current limiting maximum output voltage tolerance is guaranteed to ?% guaranteed dropout voltage at multiple current levels to-258 available in isolated and non-isolated packages description this three terminal positive adjustable voltage regulator is designed to provide 5a with higher efficiency than conventional voltage regulators. this device is designed to operate down to 1 volt input to output differential and the dropout voltage is fully specified as a function of load current. supplied in easy-to-use hermetic to-258 and to-3 packages, this device is ideally suited for military applications where small size and high reliability is required. absolute maximum ratings @ 25? power dissipation (p d ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . internally limited input - output voltage differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 v operating junction temperature range . . . . . . . . . . . . . . . . . . . . . - 55? to + 150? storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65? to + 150? lead temperature (soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300? thermal resistance: jc (to-258 isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0?/w jc (to-258 non-isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3?/w jc (to-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0?/w maximum output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 a recommended operating conditions: output voltage range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3v to 15 v ambient operating temperature range (t a ) . . . . . . . . . . . . . . . . - 55? to + 125? input voltage range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5v to 25 v om1840scm om1840ncm three terminal, positive adjustable low dropout voltage regulator in hermetic packages
3.3 - 76 3.3 om1840scm om1840ncm om1840nkm electrical characteristics -55? t a +125? (unless otherwise specified) parameter symbol test conditions min. max. unit reference voltage v ref ? v in - v out ? = 3.0 v, 1.238 1.262 v i out = 10 ma, t a = 25 c 1.5 v ? v in - v out ? 25 v, 1.225 1.270 v i out = 10 ma, i fl = 3.0 a line regulation ? v out 1.5 v ? v in - v out ? 15 v, 0.2 % (note 1) ? v in i out = 10 ma, t a = 25 c 15 v ? v in - v out ? 35 v, 0.5 % i out = 10 ma load regulation ? v out ? v in - v out ? = 3.0 v, t a = 25 c 0.3 % (note 1) ? i out i out = 10 ma, i fl = 3.0 a 0.4 % dropout voltage v do i fl = 3.0 a, ? v ref = 1% 1.5 v thermal regulation - 30 ms pulse, t a = +25 c 0.015 %/w ripple rejection ? v in f = 120 hz, c adj = 25 ?, 60 db ? v out c out = 25 ? (tantalum), i fl = 3.0 a, ? v in - v out ? = 3.0 v adjust pin current i adj 1.5 v ? v in - v out ? 25 v, 120 ? i out = 10 ma, i fl = 3.0 a adjust pin current change ? i adj 1.5 v ? v in - v out ? 25 v, 5.0 ? 10 ma i out 3.0 a miminum load current i min ? v in - v out ? = 25 v 10 ma current limit i lim ? v in - v out ? 5.0 v 5.5 a ? v in - v out ? = 25 v 0.3 a temperature stability ? v out -55 c t j +125 c 1.5 % (note 2) ? t long term stability ? v out t a = +125 c, t = 1000 hrs 1.0 % (note 2) ? t notes: 1. line and load regulation are measured at a constant junction temperature using a low duty cycle pulse technique. although po wer dissipation is internally limited, regulation is guaranteed up to the maximum power dissipation of 45 w. power dissipation is determined by t he input/output differential voltage and the output current. guaranteed maximum power dissipation will not be available over the full input/output voltage range. 2. guaranteed by design, characterization or correlation to other tested parameters. 3. the ? denotes the specifications which apply over the full operating temperature range. part number designator standard military drawing number omnirel part number 8952101y om1840scm 8952101z om1840ncm 8952101x om1840nkm ??= isolated ??= non-isolated part numbering system voltage regulators o m - 1 8 4 0 - s - c - m c o m p a n y i d e n t i f i c a t i o n p a r t n u m b e r s= isolated n= n on isolated p a c k a g e (see package codes*) s c r e e n i n g m= mil-m 38535 * p a c k a g e c o d e s : k= to-204aa (to-3) z= to-259aa (z-tab) c = to-258aa isola
3.3 - 77 3.3 om1840nkm om1840scm om1840ncm typical performance characteristics load regulation temperature (?) 150 -25 25 50 75 125 -0.20 -0.15 -0.10 0 0.05 0.10 -0.05 0 100 output voltage deviation (%) -50 ? i = 5a adjustment pin current temerature (?) adjustment pin current (?) 0 20 40 60 90 100 80 70 50 30 10 150 -50 -25 50 75 125 25 100 0 temperature stability reference voltage (v) 1.230 -50 temperature (?) 150 1.270 1.240 1.250 1.260 -25 0 25 50 75 100 125 short circuit current short circuit current (a) 0 0 input/output differential (v) 5 101520253035 1 2 3 4 5 6 7 8 9 10 150? 25? -55? full load dropout voltage minimum input/output differential (v) t j = -55? t j = 25? t j = 150? -55? j 150? 0? j 125? ?indicates guaranteed test point 2 1 0 012 3 456 output current (a) t t minimum operating current input/output differential (v) t j = 25? minimum operating current (ma) t j = 150? t j = -55? 30 0 5 10 15 20 25 7 10 9 8 6 5 4 3 2 1 0 35 i -55? t j 150? 0? t j 125?
3.3 om1840scm om1840ncm om1840nkm .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 notes case is metal/hermetically sealed isolated tab v out in out adj adj in v out i out in =1.25 ) 1+ r2 __ r1 ( 2 feet #18 wire* * the #18 wire acts as ballast resistence insuring current sharing between both devices. = oa to 15a r1 120 r2 0.015 out adj in 10f vv r1 1211% in v in v 16.5v 150f c1 10f* r2 365 1% + + c *c1 improves ripple rejection. x should be r1 at ripple frequency. ~ ~ out adj in v in v + ttl 2n3904 1k 1k 365 1% 121 1% 5v v 10f + 100f out adj in vv r1 121 v c2 100f r2 5k + *needed if device is far from filter capacitors ? out v out =1.25v ) r2 ( ? + 1 __ r1 c1 10f + typical applications parelleling regulators improving ripple rejection 1.2v - 15v adjustable regulator 5v regulator with shutdown typical applications om1840 om1840 om1840 om1840 om1840 0.015 ? ? ? ? ? ? mechanical outline to-3 pin out 1 adjust 2v in case v out pin out 1 adjust 2v out 3v in 123
|
