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 range t s t g -65~150 o c LM7912 general description parameter symbol test conditions min typ max unit output voltage v o v i = -14.5v to -30v -11.64 -12 -12.36 v line regulation (note1) regline v i = -14.5v to -30v -12 -240 mv v i = -16v to -22v -6.0 -120 load regulation (note1) regload i o = -5.0ma to-1.5a -12 -240 mv i o =-250ma to -750ma -4 -120 quiescent current i q t j =+25 o c -3 -6 ma quiescent current change i q i o = -5ma to -1a -0.5 ma v i = -15v to -30v -1.0 ripple rejection rr f = 120hz, v o = -15v to -25v 54 60 db dropout voltage v d r o p i o = -1a, t j =+25 o c -2 v 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 positive voltage regulator the LM7912 series of three terminal positive regulators are available in the to-220 package and with several fixed output voltages, making them useful in a wide range of applications. each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. if adequate heat sinking is provided, they can deliver over 1a output current. although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. product specification absolute maximum ratings electrical characteristics (refer to test circuit, io = -500ma, vi = -18v, ci= 2.2uf, co=1.0uf unless otherwise specified) ( ta = 25 c) o ( ta = 25 c) o to-220 tiger electronic co.,ltd
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