power&rf 3-28 2005 winter adjustable / fixed negative ldo regulator ic ? / ?????` ic tk72100cs, tk721xxcs, tk722xxcs description the tk72100cs, tk721xxcs and tk722xxcs are low dropout linear regulator ics with on/off control, which can supply 150ma load current. the output voltage of the tk72100c s, adjustable by external resistors, is available from ?3. 0 to -17.5v. trimmed with high accuracy, the output voltage of the tk721xxcs is available from -2.0 to -9.5v and that of the tk722xxcs is available from -3.0 to -9.5v. tk72100cs, tk721xxcs, tk722xxcs ? 150ma ?o? on/off ?`????` ic ? tk721xxcs tk722xxcs ?R??? ??????? tk721xxcs -2.0v -9.5v tk722xxcs -3.0v -9.5v gO??? tk72100cs ?R??? -3.0v -17.0v g?O?? features ? adjustable negative output voltage(tk72100cs) ? ???R (tk72100cs) ? high precision output voltage of 2.0% or 60mv(tk721xxcs/tk722xxcs) ? ???R : 2.0% or 60mv(tk721xxcs/tk722xxcs) ? active low on/off control ? on/off ?` : high-off(tk72100cs/tk721xxcs) ? active high on/off control ? on/off ?` : high-on(tk722xxcs) ? short circuit protection (over current protection) ? ?joC ( ^o ) ? thermal shutdown (over heat protection) ? `????C ( ^?o ) applications ? battery powered systems ? ??`l?C ? dsc(digital s till c amera) ? ??? ? ccd(coupled c harge d evice) bias ? ccd ? gaas bias ? gaas package outline ordering information part name package marking pin configuration ordering information tk72100cs sot23-6 k00 tk721xxcs sot23-5 kxx tk722xxcs sot23-5 txx see next page 7 t k x 2 x c s number voltage code storage direction temperature range ex.-10.3v: 03, -5.0v: 50, adjustable: 00 l: left type(sot23-5) b: back type(sot23-6) c: t a =25c, i: full l 1, 2 package code s: sot23-5, sot23-6 * ?xx? means voltage code. ?xx? ?R`???? absolute maximum ratings parameter ? symbol ? rating unit g remarks q operating voltage range ?R v op -19 v operating temperature range ?? t op -40 to +85 c power dissipation SM p d 500 mw
power&rf 2005 winter 3-29 electrical charcteristics tk72100cs: v in =-9.5v, t a =25 c, tk721xxcs/tk722xxcs: v in =v out.typ -1.5v, t a =25 c value parameter ? symbol ? min typ max units g conditions 290 500 tk72100cs dropout voltage g?R v drop 100 mv tk721xxcs/tk722xxcs i out =50ma maximum output current i out.max 200 300 ma when v out down 10% 170 250 tk72100cs quiescent current ? i q 155 250 a tk721xxcs/tk722xxcs i out =0ma 30 60 tk72100cs standby current i stb 20 60 a tk721xxcs/tk722xxcs v out off state control current ?` i cont 12 30 a v cont =+1.8v 0.0 0.3 v out on state: tk72100cs, tk722xxcs 1.5 v out off state: tk72100cs, tk722xxcs 1.2 v out on state: tk722xxcs control voltage ?`?R v cont 0.6 v v out off state: tk722xxcs block diagram 6 b.r. c.c. o.h.p. o.c.p. 90k ? 1 2 3 4 5 ? tk72100cs 6 1 2 tk72100cs 5 gnd fb noise pass 3 v out v cont 4 c out v out r 2 v ee on off r 1 v in c in c np v out =v fb {(r 1 +r 2 }/r 1 }, v fb.typ =-1.20v 5 1 2 3 4 90k ? c.c. b.r. o.h.p. o.c.p. ? tk721xxcs 5 1 2 tk721xxcs 3 noise pass gnd 4 on off v ee v in c in v cont v out c out v out c np 5 1 2 3 4 90k ? c.c. b.r. o.h.p. o.c.p. ? tk722xxcs 5 1 2 tk722xxcs 3 noise pass gnd 4 v ee v in c in v cont v out c out v out on off c np * c.c?.control c ircuit, o.h.p?o ver h eat p rotection, o.c.p?o ver c urrent p rotection, b.g?.b and gap r eference
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