integrated circuit r dc components co., ltd. technical specifications of 3-terminal positive voltage regulator description these regulators empoly internal current limiting and thermalshutdown, making them essentially indestructible. they can deliver over 1a output current with adequate heatsinking. they are intended as fixed voltage regulators in a wide range of applications including local, on-card regulation for elimination of noise and distribution problems associated with single-point regulation. pinning 1 = input2 = ground 3 = output de7818DE7818A characteristic symbol rating unit input voltage vi 35 v total power dissipation pd internal limit w operating temperature range topr 0 to +125 oc maximum junction temperature tj 125 oc storage temperature range tstg -55 to +150 oc lead temperature(soldering 10 sec.) tl 230 oc absolute maximum ratings (ta=25oc) to-220ab dimensions in inches and (millimeters) .625(15.87).570(14.48) .350(8.90).330(8.38) .562(14.27).500(12.70) .055(1.39).045(1.15) .185(4.70).173(4.40) .405(10.28) .380(9.66) .295(7.49).220(5.58) .640 (16.25) typ .055(1.40).045(1.14) .037(0.95).030(0.75) .100 (2.54) typ .024(0.60).014(0.35) f.151 f(3.83) typ 1 2 3 characteristic symbol min typ max unit test conditions DE7818A 17.46 18.00 18.54 tj=25oc output voltage de7818 vo 17.28 18.00 18.72 v DE7818A 17.46 18.00 18.54 pd 15w, 5ma io 1a de7818 17.10 18.00 18.90 line regulation regline - 15 360 mv tj=25oc, 21v vin 33v - - 180 tj=25oc, 24v vin 30v load regulation regload - - 360 mv tj=25oc, 5ma io 1.5a - 5.0 180 tj=25oc, 250ma io 750ma input bias current iib - 5.5 8.0 ma tj=25oc, io 1a input bias current change diib - - 0.5 ma 5ma io 1a - - 1.3 21v vin 33v output noise voltage vn - - 110 mv ta=25oc, 10hz f 100khz ripple rejection rr 53 69 - db 28v vin 38v, f=120hz dropout voltage DE7818A vd - 2.0 - v tj=25oc, io=1a de7818 - 2.5 - short circuit current isc - 1.5 - a tj=25oc peak output current imax 1.7 - - a tj=25oc average t c of vout dvo / dt - -1.0 - mv / oc 0oc tj +125oc, io=5ma electrical characteristics( vin =27v, iout=500ma, 0oc tj 125oc, unless otherwise specified)
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