parameter symbol typ unit input voltage v i 35 v output voltage v o 12.0 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 LM7812 general description parameter symbol test conditions min typ max unit output voltage v o v i = 14.5v to 30v 11.64 12.0 12.36 v line regulation (note1) regline v i = 14.5v to 30v 10 240 mv v i = 16v to 22v 3.0 120 load regulation (note1) regload i o = 5.0ma to1.5a 11 240 mv i o =250ma to 750ma 5 120 quiescent current i q t j =+25 o c 5.1 8 ma ripple rejection rr f = 120hz, v o = 15v to 30v 56 73 db dropout voltage v d r o p i o = 1a, t j =+25 o c 2 v output resistance r o f = 1khz 0.018 w short circuit current i s c v i = 35v, t a =+25 o c 230 ma peak current i p k t j =+25 o c 2.2 a 3-terminal 1a positive voltage regulator the LM7812 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 = 19v, ci= 0.33uf, co=0.1uf unless otherwise specified) ( ta = 25 c) o ( ta = 25 c) o to-220 tiger electronic co.,ltd
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