power&rf 3-30 2005 winter ripple filter ic with on/off control on/off ?`????? ic tk70008s description the tk70008s is ripple filter ic with on/off control , which can greatly decrease the ripple nois e in the state of the low i/o voltage difference. it can supply 150ma load current. in the off state, input currents are almost zero (pa level). tk70008s ??R????? ?p? on/off C????? ic ? 150ma ???o?? off r? (pa ? ) ??? features ? the ripple filter can be composed of few external parts. ? ?????????? ? wide operating voltage:1.8 to 16.0v ? ??R (1.8v~16v) ? active high on/off control ? ??? on/off ?`? (high on) ? the output impedance in the off state is quite high. ? off r?`??? the reverse current is zero. ? output current guarantee 150ma. ? 150ma ? ? the i/o voltage is set by external resistance. ? ?R??O? applications ? mobile communication systems: ? ???C : cordless phone, gsm, phs, pdc, cdma, `??? phs pdc cdma base station of mobile phones etc. ?? etc. ? industrial equipment: ? bIC : personal computer, barcode reader etc. ???``?` etc. ? measurement system etc. ? ?y etc package outline ordering information part name package marking pin configuration ordering information tk70008s sot23-5 08s see next page 7 t k 0 0 0 8 s t package code storage direction s: sot23 tl: left type l absolute maximum ratings parameter ? symbol ? rating unit g remarks q operating voltage range ?R v op 1.8 to 16 v operating temperature range ?? t op -40 to 85 c power dissipation SM p d 550 mw
power&rf 2005 winter 3-31 electrical charcteristics v cc =2.5v, r fil 390k ? ,ta=25 c value parameter ? symbol ? min typ max units g conditions quiescent current ? i cc 65 100 a i out =0ma, except i cont standby current ? i stb 0.1 100 na v cc =8v, v cont 0v maximum output current i outmax 360 ma i out at v out =0.9 v out recommended output current ?X? i recom 150 ma load regulation `??` loadreg 6 20 mv i out =1 to 100ma reverse bias current i rev 0.1 100 na v rev =8v, v cc =0v v cont =0v filter terminal sink current fi1 sink i sink 0.5 0.6 0.72 na fi1 terminal current=v cc -0.3v error amp. off-set voltage ` amp ???R verror 20 40 60 mv i out =30ma ripple rejection ??? r.r. 55 66 db r fil =390k ? , c fil =4.7 f, i out =30ma at.1khz control current ?` i cont 4.5 8.0 a v cont =2v v ch 1.8 v output on control voltage ?`?R v cl 0.4 v output off block diagram 1 2 3 5 4 constant current source 5 1 2 v in gnd 3 fil v cont 4 c out v out v out tk70008s on off c in v in
|
