njm2845/46 - 1 - ver.2008-02-06 low dropout voltage regulator general description package outline the njm2845/46 is low dropout voltage regulator. advanced bipolar technology achieves low noise, high ripple rejection and low quiescent current. njm2845 is 3 terminal type and njm2846 is on/off control built in type. these product c an be selected according to the applications. features high ripple rejection 75db typ. (f=1khz,3v version) output noise voltage vno=45 vrms typ. (vo=3v version) output capacitor with 2.2 f ceramic capacitor (vo 2.6v) output current io(max.)=800ma high precision output vo 1.0% low dropout voltage 0.18v typ. (io=500ma) on/off control (njm2846) internal short circuit current limit internal thermal overload protection bipolar technology package outline to-252-3 (njm2845dl1), to-252-5 (njm2846dl3) pin configuration njm2845dl1 njm2846dl3 equivalent circuit v out thermal protection bandgap reference v in gnd v out thermal protection bandgap reference v in control gnd 1.v in 2.gnd 3.v out 3 1 2 1.control 2.v in 3.gnd 4.vo 5.nc njm2845dl1 n j m2 8 4 6 dl 3 njm2845dl1 njm2846dl3 1 2 3 4 5 3
njm2845/46 - 2 - ver.2008-02-06 output voltage device name v out njm284*dl*-15 1.5v njm284*dl*-18 1.8v njm284*dl-*02 2.0v njm284*dl*-22 2.2v njm284*dl*-23 2.3v njm284*dl*-25 2.5v njm284*dl*-03 3.0v njm284*dl*-33 3.3v njm284*dl*-04 4.0v njm284*dl*-05 5.0v output voltage options available : 1.5 ~ 5.0v (0.1v step) absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +14 v control voltage v cont +14 (*1) v power dissipation p d 10(tc 25 c) 1.0(ta 25 c) w operating temperature topr -40 +85 c storage temperature ts t g -40 +150 c (*1): when input voltage is less than +14v, the absolute maximum control voltage is equal to the input voltage. operating voltage v in =+2.5v(in case of vo<2.3v) ~ +(vo+9v) njm2845 electrical characteristics (v in =vo+1v, c in =0.33 f ,co=2.2 f(1.7v njm2845/46 - 3 - ver.2008-02-06 power dissipation vs. ambient temperature test circuit njm2845 v in v in v out gnd 0.33 f i in i out v o u v a (ceramic) 2.2 f *3 *3 1.7v |