a pplica tions cellular phones cordless phones wireless communication equipment portable games cameras, vcrs portable av equipment pdas typical applicat ion circuit features maximum output current : 300ma (typ.) dropout v olta ge : 200mv@ i out =100ma operating voltage range : < 8v : 2.0v~5.0v output voltage range accuracy ce function stand-by curre nt : + 2% (standard) low power consumption : 45ua (typ.) stand-by current : less than 1ua high ripple rejection : 70db @ 1khz : ce active high : less than 0.1 a high rip ple rejec tion low esr capacitor : 70db @ 1khz low output noise packages : sot23-5 environmentally friendly : eu rohs compliant, pb free operating ambient temperat ure : -40~+85 general description the AMS6221 series is a high accuracy, low noise, high speed, low dropout cmos regulator with high ripple rejection.the series includes a reference voltage source, an err or amplifie r, a current limiter, and a phase compensation circu it. the ce function enables the entire circu it to be in stand-by state by inp utting low l evel signal. as for the AMS6221 stand-by mode, the e lectric charge at the output capacitor (c l ) will be discharged by the internal auto-discharge switch, and as a result the v out pin q uickly retur ns to the v ss level. the output stabil ization capacitor (c l ) is also compatible with low esr ceramic capacitors. output voltage is selectable in 0.1v increments wi thin a range of 2.0v ~ 5.00v, using the las er trimming technology set in factory. the current limiter' s fold-back circuit also operates as a s hort circuit protection and an output current limiter at the output pin. the series achieves a fast respon se wit h only 45a of low pow er con sumption. also the series h as low dropout voltage characteristics, which is 200mv at i out =100ma .
pin number sot23-5 pin name functions 1 v in power input 5 v out output 2 v ss ground 3 ce on/off control 4 nc no connection pin name designator conditions h 1.2v ?v ce ? 6.0v ce l v ce ?0.3v 9pin configuration sot23-5 ( top view ) nc 1 3 2 5 4 vss v out vin ce pin assignment 9 block diagrams
9 absolute maximum ratings input voltage v in 8 v output current i out 500 ma output voltage v out vss-0.3 ~ vout+0.3 v sot23 pd 300 mw power dissipation sot89 pd 500 mw operating temperature t opr -25 ~ +85 storage temperature t stg -40 ~ +125 soldering temp & time t solder 260 , 10s parameter symbol ratings units output voltage v out (e) (note 2) i out =40ma, v in =vout+1v x 0.98 v out (t) (note 1) x 1.02 v input voltage v in 7.0 v maximum output current i out max v in =vout+1v 300 ma load regulation ?v out v in =vout+1v, 1mai out 100ma 30 mv v dif1 i out =100ma 200 mv dropout voltage (note 3) v dif2 i out =200ma 400 mv quiescent current i ss v in =vout+1v 45 a ce low level current i cel vce 0v 0.1 a line regulation ? v out ? v in ? v out i out =40ma vout+1v v in 8v 0.05 %/v output noise en i out =40ma 300hz~50khz 50 uvrms psrr vin= [vout+1]v +1vp-pac i out =40ma,f=1khz 70 db ? : 1. v out (t) nominal output voltage 2. v out (e) effective output voltage 3. v dif v in1 ?v out (e)? v in1 is the input voltage when vout1 appears at the vout pin while input voltage is gradually decreased. v out (e)? is the voltage equal to 98% of the normal output voltage when amply stabilized vout (t) +1.0v are input at the vin pin. electrical characteristics 9 parameter symbol conditions min. typ. max. units
9 packaging information hsot23-5 :::?::?:w:?:w:?:?:? mm a - - 1.25 a1 0 - 0.15 a2 1.00 1.10 1.20 a3 0.60 0.65 0.70 b 0.36 - 0.50 b1 0.36 0.38 0.45 c 0.14 - 0.20 c1 0.14 0.15 0.16 d 2.826 2.926 3.026 e 2.60 2.80 3.00 e1 1.526 1.626 1.726 e 0.95bsc e1 1.90bsc l 0.35 0.45 0.60 l1 0.59ref l2 0.25bsc r 0.10 - - r1 0.10 - 0.25 0 - 8 1 3 5 7 2 6 8 10 symbol min type max
|
