parameter symbol typ unit input voltage v i - 35 v output voltage v o -12 v peak current i p k -2 .2 a operating temperature range t o p r 0~125 o c storage temperature rang e t s t g -65~150 o c lm7912j general description the lm7912j series of three-terminal negative regulators are available in to-252 package and with several fixed output voltages, making them useful in a wide range of applications. each type employs internal current limiting, thermal shutdown and safe operating area protection, making it essentiall y indestructible. product specification absolute maximum ratings (refer to test circuit, io = 500ma, vi = -18v, ci= 2.2uf, co=1.0uf unless otherwise specified) ( ta = 25 c) o electrical characteristics ( ta = 25 c) o parameter symbol test conditions min typ max unit output voltage v o tj = 25 v i = -15.5v ~ -27v i o = 5.0 a~1.0a, p d <15w -11.64 -12.0 -12.36 v line regulation v o tj = 25 , vi= -15v ~ -30v - 240 mv tj = 25 v i = -16v ~ -22v - 120 load regulation v o tj = 25 , i o = 5.0ma ~1.0a - 240 mv tj = 25 i o = 250ma ~ 750ma - 120 quiescent current i q t j =+25 o c -8 ma quiescent current change iq io = 5.0 a ~ 1.0a - 0.5 ma tj = 25 , vi= -15v ~ -30v - 1.0 ma output voltage drift vo/ t io = 5.0 a -0.8 mv/ ripple rejection rr f = 120hz, v o = -15v to -22v 54 60 db dropout voltage v d r o p i o = 1.0a, t j =+25 o c -2 v output resistance r o f = 1khz 0.015 ? short circuit current i s c v i = -35v, t a =+25 o c - 300 ma peak current i p k t j =+25 o c -2 .2 a 3-terminal 1a negative voltage regulator to-252 1: gnd 2: in 3: out tiger electronic co.,ltd
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