3.5 - 111 3.5 three terminal, adjustable voltage, 1.0 amp precision negative regulator in a hermetic surface mount package 4 11 r1 supersedes 1 05 r0 surface mount negative adjustable voltage regulator features ? surface mount hermetic package ? adjustable output voltage ? built-in thermal overload protection ? short circuit current limiting ? product is available hi-rel screened ? electrically similar to industry standard type lm137 description this three terminal negative regulator is supplied in a hermetically sealed surface mount package. all protective features are designed into the circuit, including thermal shutdown, current limiting and safe-area control. with heat sinking, they can deliver over 1.5 amp of output current. this unit features output voltages that can be trimmed using external resistors, from -1.2 volts to -37 volts. absolute maximum ratings input to output voltage differential ........................................ 40 v operating junction temperature range ........................- 55 c to + 150c storage temperature range .................................- 55 c to + 150c typical power/thermal characteristics: rated power @ 25c t c .......................................................... 17.5w t a .............................................................3w thermal resistance: jc ........................................................3.5c/w ja ........................................................42c/w lead temperature at case (5 sec) .................................225c OM7625NM pin connection mechanical outline 12 3 .500 .140 .415 .157 .015 .140 .140 .075 .075 .062 .375 .030 min. top view side view bottom view .625 pin 1: adjust pin 2: v out pin 3: v in
OM7625NM 3.5 electrical characteristics -55c t a 125c, i l = 8ma (unless otherwise specified) parameter symbol test conditions min. max. unit reference voltage v ref ? v diff ? = 3.0v, t a = 25c -1.275 -1.225 ? v diff ? = 3.0v ? -1.30 -1.20 v ? v diff ? = 40v, t a = 25c -1.275 -1.225 ? v diff ? = 40v ? -1.30 -1.20 line regulation r line 3.0 v ? v diff ? 40v, t a = 25c -9 9 (note 1) 3.0 v ? v diff ? 40v ? -23 23 mv load regulation r load ? v diff ? = 5.0v, 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 200ma, t a = 25c -25 25 ? v diff ? = 40v, 8ma i l 100ma ? -25 25 thermal regulation v rth v in = -14.6v, i l = 1.5a -5 5 mv p d = 20 watts, t = 20 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 ?i adj (line) 3.0v ? v diff ? 40v ? -5 5 a current change ?i 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 out = -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.
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