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gc3-n022 page 1 application manual auto discharge, ultra small package, high rr, fast response, low noise 200ma cmos ldo regulator ic tk634xxamf contents 1 . description 2 2 . features 2 3 . applications 2 4 . pin configuration 2 5 . block diagram 2 6 . ordering information 3 7 . absolute maximum ratings 3 8 . electrical characteristics 4 9 . test circuit 6 10 . typical characteristics 8 11 . pin description 23 12 . applications information 24 13 . package outline 28 14 . notes 30 15 . offices 30
tk634xxamf gc3-n022 page 2 auto discharge, ultra small package, high rr, fast response, low noise 200ma cmos ldo regulator ic tk634xxamf 1. description the tk634xxamf is a cmos ldo regulator with auto discharge function. the package is the very small and thin hson1214-4. the ic is designed for portable applications with space requirements. the ic can supply 200ma output current. the ic does not require a noise-bypass capacitor. the output voltage is internally fixed from 1.5v to 4.2v. 2. features ? auto discharge function ? package: hson1214-4 ? no noise bypass capacitor required ? high ripple rejection ? fast transient response ? low noise ? thermal and over current protection ? high maximum load current ? on/off control ? high accuracy 3. applications ? mobile communication ? battery powered system ? any electronic equipment 4. pin configuration ? hson1214-4 2 1 4v in 3v cont v out gnd (top view) 5. block diagram v out gnd v in c out c in 2 1 v ref 4 thermal & over current protection 3 v cont on/off control
tk634xxamf gc3-n022 page 3 6. ordering information voltage code (refer to the following table) package code mf : hson1214-4 tape/reel code l : left type solder composion code g0 : lead free t k 6 3 4 g a operating temp. range code c : c rank(standard) 0l-c output voltage voltage code output voltage voltage code output voltage voltage code 1.5v 15 2.85v 01 3.5v 35 1.8v 18 2.9v 29 4.0v 40 2.5v 25 3.0v 30 2.6v 26 3.1v 31 2.7v 27 3.2v 32 2.8v 28 3.3v 33 *if you need a voltage other than the value listed in the above table, please contact toko. 7. absolute maximum ratings t a =25 c parameter symbol rati ng units conditions absolute maximum ratings input voltage v in,max -0.3 ~ 6.0 v output pin voltage v out,max -0.3 ~ v in +0.3 v control pin voltage v cont,max -0.3 ~ 6.0 v storage temperature range t stg -55 ~ 150 c power dissipation p d 400 mw internal limited t j =150c *, when mounted on pcb operating condition operational temperature range t op -40 ~ 85 c operational voltage range v op 1.8 ~ 6.0 v * p d must be decreased at the rate of 3.2mw/ c for operation above 25 c. the maximum ratings are the absolute limitation values with the possibility of the ic being damaged. when operation exceeds this standard quality can not be guaranteed.
tk634xxamf gc3-n022 page 4 8. electrical characteristics the parameters with min. or max. values will be guaranteed at t a =t j =25 c with test when manufacturing or sqc(statistical quality control) methods. the operation between -40 ~ 85 c is guaranteed by design. v in =v out,typ +1v, v cont =1.2v, t a =t j =25c value parameter symbol min typ max units conditions output voltage v out refer to table 1 v i out =5ma line regulation linreg - 0.0 4.0 mv ? v in =1v load regulation loareg refer to table 1 mv refer to table 1 dropout voltage *1 v drop refer to table 1 mv refer to table 1 maximum load current *2 i out,max 210 350 - ma v out =v out,typ 0.9 quiescent current i q - 35 70 a i out =0ma, v cont =v in standby current i standby - 0.01 0.1 a v cont =0v gnd pin current i gnd - 55 110 a i out =50ma, v cont =v in discharge resistance r dis - 25 - ? v in =5v, v out =0.1v, v cont =0v control terminal control current i cont - 0.7 1.4 a v cont =1.2v 1.2 - - v v out on state control voltage v cont - - 0.2 v v out off state reference value output voltage / temp. ? v out / ? t a - 100 - ppm/c i out =5ma output noise voltage (tk63428a) v noise - 35 - vrms c out =1.0f, i out =30ma, bpf=400hz~80khz ripple rejection (tk63428a) rr - 72 - db c out =1.0f, i out =10ma, f=1khz rise time (tk63428a) t r - 85 - s c out =1.0f, i out =30ma v cont : pulse wave (100hz), v cont on v out 95% point *1 : for v out 1.8v, no regulations. *2 : the maximum output current is limited by power dissipation. the maximum load current is the current where the output volt age decreases to 90% by increasing the output current at t j =25c, compared to the output voltage specified at v in =v out,typ +1v. the maximum load current indicates the current at which over current protection turn on. for all output voltage products, the maximum output current for normal operation without operating any protection is 200ma. accordingly, loareg and v drop are specified on the condition that i out is less than 200ma. general note parameters with only typical values are just reference. (not guaranteed) the noise level is dependent on the output voltage , the capacitance and capacitor characteristics.
tk634xxamf gc3-n022 page 5 table 1 . preferred product (tk634xxamf) load regulation dropout voltage output voltage i out =5 ~ 100ma i out =5 ~ 200ma i out =100ma i out =200ma min typ max typ max typ max typ max typ max part number v v v mv mv mv mv mv mv mv mv tk63415amf 1.475 1.500 1.525 10 40 19 76 - - - - tk63418amf 1.775 1.800 1.825 10 40 20 80 - - - - tk63425amf 2.475 2.500 2.525 10 40 20 80 95 145 185 310 tk63426amf 2.574 2.600 2.626 10 40 20 80 90 145 180 300 tk63427amf 2.673 2.700 2.727 10 40 20 80 90 140 175 295 tk63428amf 2.772 2.800 2.828 10 40 20 80 85 135 170 290 tk63401amf 2.821 2.850 2.879 10 40 20 80 85 135 170 285 tk63429amf 2.871 2.900 2.929 10 40 20 80 85 135 165 285 tk63430amf 2.970 3.000 3.030 10 40 20 80 85 130 165 280 tk63431amf 3.069 3.100 3.131 11 44 21 84 80 130 160 275 tk63432amf 3.168 3.200 3.232 11 44 21 84 80 125 160 270 tk63433amf 3.267 3.300 3.333 11 44 21 84 80 125 155 265 tk63435amf 3.465 3.500 3.535 11 44 21 84 75 120 150 255 tk63440amf 3.960 4.000 4.040 11 44 21 84 70 115 140 240 notice. please contact your authorized toko re presentative for voltage availability .
tk634xxamf gc3-n022 page 6 9. test circuit i out =5ma c out =1.0 f c in =1.0 f v cont v _ a _ i cont v out v in = v out,typ +1.0v a _ v in v out v cont gnd i in ? test circuit for electrical characteristic notice. the limit value of electrical characteristics is applied when c in =1.0 f(ceramic), c out =1.0 f(ceramic). but c in , and c out can be used with b oth ceramic and tantalum capacitors. i out c out =1.0 f c in =1.0 f v cont v _ a _ i cont v out v in v in v out v cont gnd ? ? v out vs v in ? v drop vs i out ? v out vs i out ? ? v out vs i out ? ? v out vs t a ? v drop vs t a ? i out,max vs t a ? i cont vs v cont , v out vs v cont ? i cont vs t a ? v cont vs t a ? v noise vs v in ? v noise vs i out ? v noise vs v out ? v noise vs frequency c out =1.0 f c in =1.0 f v cont a _ i cont v in = v out,typ +1.0v a _ v in v out v cont gnd i in open ? i q vs v in ? i standby vs v in ? i q vs t a i out c out =1.0 f c in =1.0 f v cont v in = v out,typ +1.0v v in v out v cont gnd a _ i gnd a _ i cont ? i gnd vs i out ? i gnd vs t a
tk634xxamf gc3-n022 page 7 i out =10ma c out =1.0 f v in v out v cont gnd v in = v out,typ +1.5v v ripple = 500mv p-p v cont =1.2v c in =1.0 f ? rr vs v in ? rr vs frequency ? rr vs frequency c out =1.0 f v _ v out v in v out v cont gnd v out,typ +1v v out,typ +2v v cont =1.2v i out =5ma ? line transient c out =1.0 f c in =1.0 f v _ v out v in = v out,typ +1.0v v in v out v cont gnd i out v cont =1.2v ? load transient i out = 0ma or 30ma c out =1.0 f c in =1.0 f v _ v out v in = v out,typ +1.0v v in v out v cont gnd v cont =0v 1.2v ? on/off transient
tk634xxamf gc3-n022 page 8 10. typical characteristics 10-1. dc characteristics ? ? v out vs v in (tk63415amf) v in [v] 0123456 ? v out [mv] -30 -25 -20 -15 -10 -5 0 5 10 i out =5ma ? ? v out vs v in (tk63428amf) v in [v] 0123456 ? v out [mv] -30 -25 -20 -15 -10 -5 0 5 10 i out =5ma ? ? v out vs v in (tk63442amf) v in [v] 0123456 ? v out [mv] -30 -25 -20 -15 -10 -5 0 5 10 i out =5ma ? ? v out vs v in (tk63415amf) v in -v out [mv] -100 0 100 200 300 ? v out [mv] -100 -80 -60 -40 -20 0 20 40 i out =0, 5, 50, 100, 150, 200ma ? ? v out vs v in (tk63428amf) v in -v out [mv] -100 0 100 200 300 ? v out [mv] -100 -80 -60 -40 -20 0 20 40 i out =0, 5, 50, 100, 150, 200ma ? ? v out vs v in (tk63442amf) v in -v out [mv] -100 0 100 200 300 ? v out [mv] -100 -80 -60 -40 -20 0 20 40 i out =0, 5, 50, 100, 150, 200ma
tk634xxamf gc3-n022 page 9 ? v drop vs i out (tk63428amf) i out [ma] 0 50 100 150 200 250 v drop [mv] -400 -350 -300 -250 -200 -150 -100 -50 0 ? v drop vs i out (tk63442amf) i out [ma] 0 50 100 150 200 250 v drop [mv] -400 -350 -300 -250 -200 -150 -100 -50 0 ? v out vs i out (tk63415amf) 0 0.5 1 1.5 2 i out [ma] 0 100 200 300 400 500 v out [v] ? v out vs i out (tk63428amf) i out [ma] 0 100 200 300 400 500 v out [v] 0 0.5 1 1.5 2 2.5 3 3.5 4 ? v out vs i out (tk63442amf) 0 1 2 3 4 5 6 i out [ma] 0 100 200 300 400 500 v out [v]
tk634xxamf gc3-n022 page 10 ? ? v out vs i out (tk63415amf) i out [ma] 0 50 100 150 200 250 ? v out [mv] -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 ? ? v out vs i out (tk63428amf) i out [ma] 0 50 100 150 200 250 ? v out [mv] -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 ? ? v out vs i out (tk63442amf) i out [ma] 0 50 100 150 200 250 ? v out [mv] -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 ? ? v out vs t a (tk63415amf) t a [c] -50-250 255075100 ? v out [mv] -100 -80 -60 -40 -20 0 20 40 60 80 100 ? ? v out vs t a (tk63428amf) t a [c] -50-250 255075100 ? v out [mv] -100 -80 -60 -40 -20 0 20 40 60 80 100 ? ? v out vs t a (tk63442amf) t a [c] -50-250 255075100 ? v out [mv] -100 -80 -60 -40 -20 0 20 40 60 80 100
tk634xxamf gc3-n022 page 11 ? v drop vs t a (tk63428amf) t a [c] -50-250 255075100 v drop [mv] -400 -350 -300 -250 -200 -150 -100 -50 0 i out =100ma i out =200ma ? v drop vs t a (tk63442amf) t a [c] -50-250 255075100 v drop [mv] -400 -350 -300 -250 -200 -150 -100 -50 0 i out =100ma i out =200ma ? i out,max vs t a (tk63415amf) t a [c] -50-250 255075100 i out,max [ma] 200 300 400 ? i out,max vs t a (tk63428amf) t a [c] -50-250 255075100 i out,max [ma] 200 300 400 ? i out,max vs t a (tk63442amf) t a [c] -50-250 255075100 i out,max [ma] 200 300 400
tk634xxamf gc3-n022 page 12 ? i q vs v in (tk63415amf) v in [v] 0123456 i q [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in ? i q vs v in (tk63428amf) v in [v] 0123456 i q [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in ? i q vs v in (tk63442amf) v in [v] 0123456 i q [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in ? i standby vs v in (tk63415amf) v in [v] 0123456 i standby [na] 0 1 2 3 4 5 6 7 8 9 10 v cont =0v ? i standby vs v in (tk63428amf) v in [v] 0123456 i standby [na] 0 1 2 3 4 5 6 7 8 9 10 v cont =0v ? i standby vs v in (tk63442amf) v in [v] 0123456 i standby [na] 0 1 2 3 4 5 6 7 8 9 10 v cont =0v
tk634xxamf gc3-n022 page 13 ? i gnd vs i out (tk63415amf) i out [ma] 0 50 100 150 200 250 i gnd [ a] 0 20 40 60 80 100 120 140 160 180 200 v cont =v in ? i gnd vs i out (tk63428amf) i out [ma] 0 50 100 150 200 250 i gnd [ a] 0 20 40 60 80 100 120 140 160 180 200 v cont =v in ? i gnd vs i out (tk63442amf) i out [ma] 0 50 100 150 200 250 i gnd [ a] 0 20 40 60 80 100 120 140 160 180 200 v cont =v in ? i q vs t a (tk63415amf) t a [c] -50-250 255075100 i q [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in ? i q vs t a (tk63428amf) t a [c] -50-250 255075100 i q [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in ? i q vs t a (tk63442amf) t a [c] -50-250 255075100 i q [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in
tk634xxamf gc3-n022 page 14 ? i gnd vs t a (tk63415amf) t a [c] -50 -25 0 25 50 75 100 i gnd [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in , i out =50ma ? i gnd vs t a (tk63428amf) t a [c] -50 -25 0 25 50 75 100 i gnd [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in , i out =50ma ? i gnd vs t a (tk63442amf) t a [c] -50 -25 0 25 50 75 100 i gnd [ a] 0 10 20 30 40 50 60 70 80 90 100 v cont =v in , i out =50ma ? i cont vs v cont , v out vs v cont (tk63415amf) v cont [v] 0 0.5 1 1.5 2 i cont [ a] 0 0.5 1 1.5 2 v out [v] 0 0.5 1 1.5 2 v out i cont ? i cont vs v cont , v out vs v cont (tk63428amf) v cont [v] 0 0.5 1 1.5 2 i cont [ a] 0 0.5 1 1.5 2 v out [v] 0 1 2 3 4 v out i cont ? i cont vs v cont , v out vs v cont (tk63442amf) v cont [v] 0 0.5 1 1.5 2 i cont [ a] 0 0.5 1 1.5 2 v out [v] 0 2 4 6 8 v out i cont
tk634xxamf gc3-n022 page 15 ? v cont vs t a (tk63415amf) t a [c] -50-250 255075100 v cont [v] 0 0.2 0.4 0.6 0.8 1 1.2 1.4 ? v cont vs t a (tk63428amf) t a [c] -50-250 255075100 v cont [v] 0 0.2 0.4 0.6 0.8 1 1.2 1.4 ? v cont vs t a (tk63442amf) t a [c] -50-250 255075100 v cont [v] 0 0.2 0.4 0.6 0.8 1 1.2 1.4 ? i cont vs t a (tk634xxamf) t a [c] -50-250 255075100 i cont [ ? ] 0 0.25 0.5 0.75 1 v cont =1.2v
tk634xxamf gc3-n022 page 16 10-2. ac characteristics ? rr vs v in (tk63415amf) v in -v out,typ [v] 0 0.5 1 1.5 2 2.5 3 3.5 rr [db] -100 -80 -60 -40 -20 0 -90 -70 -50 -30 -10 v ripple =0.1v p-p , f=1khz i out = 200ma 150ma 100ma 50ma 10ma ? rr vs v in (tk63428amf) v in -v out,typ [v] 0 0.5 1 1.5 2 2.5 3 3.5 rr [db] -100 -80 -60 -40 -20 0 -90 -70 -50 -30 -10 v ripple =0.1v p-p , f=1khz i out = 200ma 150ma 100ma 50ma 10ma ? rr vs v in (tk63442amf) 0 0.5 1 1.5 2 2.5 rr [db] -100 -80 -60 -40 -20 0 -90 -70 -50 -30 -10 v in -v out,typ [v] v ripple =0.1v p-p , f=1khz i out = 200ma 150ma 100ma 50ma 10ma ? rr vs frequency (tk63415amf) frequency [hz] 100 1k 10k 100k 1m rr [db] -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 i out =10ma c out =1.0 f(cer.) c out =1.0 f(tant.) ? rr vs frequency (tk63428amf) frequency [hz] 100 1k 10k 100k 1m rr [db] -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 i out =10ma c out =1.0 f(cer.) c out =1.0 f(tant.) ? rr vs frequency (tk63442amf) frequency [hz] 100 1k 10k 100k 1m rr [db] -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 i out =10ma c out =1.0 f(cer.) c out =1.0 f(tant.)
tk634xxamf gc3-n022 page 17 ? rr vs frequency (tk63415amf) frequency [hz] 100 1k 10k 100k 1m rr [db] -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 i out =10ma c out =0.68 f(cer.) 1.0 f(cer.) 2.2 f(cer.) ? rr vs frequency (tk63428amf) frequency [hz] 100 1k 10k 100k 1m rr [db] -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 i out =10ma c out =0.68 f(cer.) 1.0 f(cer.) 2.2 f(cer.) ? rr vs frequency (tk63442amf) frequency [hz] 100 1k 10k 100k 1m rr [db] -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 i out =10ma c out =0.68 f(cer.) 1.0 f(cer.) 2.2 f(cer.) the ripple rejection (rr) characteristic depends on the characteristic and the capacitance value of the capacitor connected to the output side. the rr characteristic of 50khz or more varies greatly with the capacitor on the output side and pcb pattern. if necessary, please confirm stability of your design.
tk634xxamf gc3-n022 page 18 ? v noise vs v in (tk63415amf) v in [v] v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100 123456 0 i out =30ma ? v noise vs v in (tk63428amf) v in [v] 2.5 3 3.5 4 4.5 5 5.5 6 v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100 i out =30ma ? v noise vs v in (tk63442amf) v in [v] v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100 4 4.5 5 5.5 6 i out =30ma ? v noise vs i out (tk63415amf) i out [ma] 0 50 100 150 200 250 v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100 ? v noise vs i out (tk63428amf) i out [ma] 0 50 100 150 200 250 v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100 ? v noise vs i out (tk63442amf) i out [ma] 0 50 100 150 200 250 v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100
tk634xxamf gc3-n022 page 19 ? v noise vs v out (tk634xxamf) v out [v] v noise [ vrms] 0 10 20 30 40 50 60 70 80 90 100 22.533.544.5 1.5 i out =30ma ? v noise vs frequency (tk63415amf) frequency [hz] 10 100 1k 10k 0.01 0.1 1 10 100k i out =10ma v noise [v/ y hz] ? v noise vs frequency (tk63428amf) frequency [hz] 10 100 1k 10k 0.01 0.1 1 10 100k i out =10ma v noise [v/ y hz] ? v noise vs frequency (tk63442amf) frequency [hz] 10 100 1k 10k 0.01 0.1 1 10 100k i out =10ma v noise [v/ y hz]
tk634xxamf gc3-n022 page 20 10-3. transient characteristics ? line transient (tk63415amf) time 20 sec/div v in 10mv/div i out =50, 100, 200ma 2.5v 3.5v v out 1v/div ? line transient (tk63428amf) time 20 sec/div v in 10mv/div i out =50, 100, 200ma 3.8v 4.8v v out 1v/div ? line transient (tk63442amf) time 20 sec/div v in 10mv/div i out =50, 100, 200ma 5.2v 6.2v v out 1v/div ? load transient (i out =5 ? 100ma) (tk63415amf) time 20 sec/div 100mv/div 100ma/div i out v out 5ma c out =0.68, 1.0, 2.2 f 100ma ? load transient (i out =5 ? 100ma) (tk63428amf) time 20 sec/div 100mv/div 100ma/div i out v out 5ma 100ma c out =0.68, 1.0, 2.2 f ? load transient (i out =5 ? 100ma) (tk63442amf) time 20 sec/div 100mv/div 100ma/div i out v out 5ma 100ma c out =0.68, 1.0, 2.2 f
tk634xxamf gc3-n022 page 21 ? load transient (i out =0 or 5 ? 100ma) (tk63415amf) time 10msec/div 100mv/div 100ma/div i out v out 100ma 0 or 5ma 0 ? 100ma 5 ? 100ma ? load transient (i out =0 or 5 ? 100ma) (tk63428amf) time 10msec/div 100mv/div 100ma/div i out v out 100ma 0 or 5ma 0 ? 100ma 5 ? 100ma ? load transient (i out =0 or 5 ? 100ma) (tk63442amf) time 10msec/div 100mv/div 100ma/div i out v out 100ma 0 or 5ma 0 ? 100ma 5 ? 100ma ? load transient (0 ? 100ma) (tk63428amf/m5) time 10 sec/div 100mv/div 100ma/div i out v out 100ma 0 or 5ma 5 ? 100ma 0 ? 100ma ? load transient 0 ? 100ma) (tk63428amf/m5) time 10 sec/div 100mv/div 100ma/div i out v out 100ma 0 or 5ma 5 ? 100ma 0 ? 100ma ? load transient (0 ? 100ma) (tk63428amf/m5) time 10 sec/div 100mv/div 100ma/div i out v out 100ma 0 or 5ma 5 ? 100ma 0 ? 100ma
tk634xxamf gc3-n022 page 22 ? on/off transient (v cont =0 1.2v) (tk63415amf) time 40 sec/div v cont 200ma/div c out =0.68, 1.0, 2.2 f i in i out =30ma v out 500mv/div 1v/div ? on/off transient (v cont =0 1.2v) (tk63428amf) time 40 sec/div v cont 200ma/div i in i out =30ma v out 1v/div 1v/div c out =0.68, 1.0, 2.2 f ? on/off transient (v cont =0 1.2v) (tk63442amf) time 40 sec/div v cont 200ma/div i in i out =30ma v out 2v/div 1v/div c out =0.68, 1.0, 2.2 f ? on/off transient (v cont =1.2 0v) (tk63415amf) 40sec/div v out 0.5v/div 1v/div v cont c out =0.68, 1.0, 2.2 f i out =0ma time i in 200ma/div ? on/off transient (v cont =1.2 0v) (tk63428amf) 40sec/div v out 1v/div 1v/div v cont c out =0.68, 1.0, 2.2 f time i out =0ma i in 200ma/div ? on/off transient (v cont =1.2 0v) (tk63442amf) 40sec/div v out 2v/div 1v/div v cont c out =0.68, 1.0, 2.2 f time i out =0ma i in 200ma/div
tk634xxamf gc3-n022 page 23 11. pin description pin no. pin description internal equivalent circuit description 1 v out v out v in esd protection on/off control output terminal 2 gnd gnd terminal 3 v cont v cont 1.65m ? esd protection control terminal v cont > 1.2v : on v cont < 0.2v : off the pull-down resistor (about 1.65m ? ) is built-in. 4 v in input terminal
tk634xxamf gc3-n022 page 24 12. applications information 12-1. stability linear regulators require input and output capacitors in order to maintain the regulator's loop stability. if 0.68f capacitors are connected to th e input side and the output side, the ic provides stable operation. however, it is recommended to use as large a value capacitor as is practical. the output noise an d the ripple noise decrease as the value of the capacitor increases. a recommended value of the application is as follows. c in 0.68f, c out 0.68f it is not possible to determine this indiscriminately. please confirm the stability in your design. fig12-1: capacitor in the application tk634xxa v out v cont v in c out 0.68f c in 0.68f fig12-2: output current vs stable operation area -40~+85oc 0.01 0.1 1 10 100 0 50 100 150 200 i out [ma] esr [
] stable area fig.12-2 shows the stable operation area of output current and the equivalent seri es resistance (esr) with a ceramic capacitor of 0.68f. es r of the output capacitor must be in the stable operation area. please select the best output capacitor according to the voltage and current used. the stability of the regulator improves as the value of the output side capacitor increases (the stable operation area extends.) please use as large a value capacitor as is practical. for evaluation kyocera : cm05x5r105k10ab fig12-3: ex. ceramic capacitance vs voltage, temperature cap(%) 12 50 bias voltage(v) cap(%) 100 ta(c) capacitance vs voltage capacitance vs temperature b curve f curve 10 8 6 4 2 0 60 70 80 90 100 b curve f curve 75 50 25 0 -25 -50 50 60 70 80 90 100 generally, a ceramic capacitor has both a temperature characteristic and a voltage ch aracteristic. please consider both characteristics when selecting the part. the b curves are the recommended characteristics.
tk634xxamf gc3-n022 page 25 12-2. layout
$ 12-4: layout example v out v in v cont gnd (top view) pcb material: glass epoxy size: 30mm30mm1mm v cont v out v in gnd (top view) pcb material: glass epoxy size: 7mm8mm0.8mm please do derating with 3.2mw/ c(pcb size: 7mm 8mm0.8mm), 7.2mw/ c(pcb size: 30mm30mm 1mm), at p d =400mw(pcb size: 7mm8mm0.8m), 900mw(pcb size: 30mm30mm1mm), and 25 c or more. fig12-5: derating curve 25 50 100 150c p d (mw) 400 (85c) 900 -7.2mw/c pcb size (30mm30mm1mm) -3.2mw/c pcb size (7mm8mm0.8mm) the package loss is limited at the temperature that the internal temperature sensor works (about 150 c). therefore, the package loss is assumed to be an internal limitation. there is no heat radiation characteristic of the package unit assumed because of its small size. heat is carried away from the device by being mounted on the pcb. this value is directly effected by the material and the copper pattern etc. of the pcb. the losses are approximately 400mw. enduring these losses becomes possible in a lot of applications operating at 25 c. the overheating protection circuit operates when the junction temperature reaches 150 c (this happens when the regulator is dissipating excessive power, outside temperature is high, or heat radiation is bad). the output current and the output voltage will drop when the protection circuit operates. however, operation begins again as soon as the output voltage drops and the temperature of the chip decreases. how to determine the thermal resistance when mounted on pcb the thermal resistance when mounted is expressed as follows: t j = ja p d +t a t j of ic is set around 150 c. p d is the value when the thermal sensor is activated. if the ambient temperature is 25 c, then: 150= ja p d +25 ja =125/p d ( c /mw)
tk634xxamf gc3-n022 page 26 p d is easily calculated. a simple way to determine p d is to calculate v in i in when the output side is shorted. input current gradually falls as output voltage rises after working thermal shutdown. you should use the value when thermal equilibrium is reached. fig12-6: how to determine dp d 25 50 100 150 p d (mw) p d t a (c) 75 125 dp d 2 3 4 5 procedure (when mounted on pcb.) 1. find p d (v in i in when the output side is short- circuited). 2. plot p d against 25 c. 3. connect p d to the point corresponding to the 150 c with a straight line. 4. in design, take a vertical line from the maximum operating temperature (e.g., 75 c) to the derating curve. 5. read off the value of p d against the point at which the vertical line intersects the derating curve. this is taken as the maximum power dissipation dpd. 6. dp d (v in,max ? v out )=i out (at 75 c) the maximum output current at the highest operating temperature will be i out ? dp d (v in,max -v out ). please use the device at low temperature with better radiation. the lower temperature provides better quality. 12-3. on/off control it is recommended to turn the regulator off when the circuit following the regulator is not operating. a design with little electric power loss can be implemented. we recommend the use of the on/off control of the regulator without using a high side switch to provide an output from the regulator. a highly accurate output voltage with low voltage drop is obtained. because the control current is small, it is possible to control it directly by cmos logic. fig12-7: the use of on/off control reg v sat on/off cont. control terminal voltage ((v cont ) on/off state v cont > 1.2v on v cont < 0.2v off parallel connected on/off control fig12-8: the example of parallel connected ic tk63442a tk63428a tk63415a 4.2v 2.8v 1.5v on/off cont. v in v out the above figure is multiple regulators being controlled by a single on/off control signal. there is concern of overheating, because the power loss of the low voltage side ic (tk63415a) is large. the series resistor (r) is put in the input line of the low output voltage regulator in order to prevent over-dissipation. the voltage dropped across the resistor reduces the large input-to-output voltage across the regulator, reducing the power dissipation in the device. when the thermal sensor works, a decrease of the output voltage, oscillation, etc. may be observed.
tk634xxamf gc3-n022 page 27 12-4. definition of term characteristics ? output voltage (v out ) the output voltage is specified with v in =(v outtyp +1v) and i out =5ma. ? maximum output current (i out, max ) the rated output current is sp ecified under the condition where the output voltage drops to 90% of the value specified with i out =5ma. the input voltage is set to v outtyp +1v and the current is pulsed to minimize temperature effect. ? dropout voltage (v drop ) the dropout voltage is the difference between the input voltage and the output voltage at which point the regulator starts to fall out of regulation. below this value, the output voltage will fall as the input voltage is reduced. it is dependent upon the output voltage, the load current, and the junction temperature. ? line regulation (linreg) line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. the line regulation is specified as the input voltage is changed from v in =v out,typ +1v to v in =6v. it is a pulse measurement to minimize temperature effect. ? load regulation (loareg) load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. it is a pulsed measurement to mi nimize temperature effects with the input voltage set to v in =v out,typ +1v. the load regulation is specified under an output current step condition of 1ma to 50ma. ? ripple rejection (rr) ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output. it is specified with 500mv p-p , 1khz super-imposed on the input voltage, where v in =v out,typ +1.5v. ripple rejection is the ratio of the ripple content of the output vs. input and is expressed in db. ? standby current (i standby ) standby current is the curre nt which flows into the regulator when the output is turned off by the control function (v cont =0v). protections ? over current sensor the over current sensor protects the device when there is excessive output current. it also protects the device if the output is accidentally connected to ground. ? thermal sensor the thermal sensor protects the device in case the junction temperature exceeds the safe value (t j =150 c). this temperature rise can be caused by external heat, excessive power dissipation caused by large input to output voltage drops, or excessive output current. the regulator will shut off when the temperature exceeds the safe value. as the junction temperatures decrease, the regulator will begin to operate again. under sustained fault conditions, the regulator output will oscillate as the device turns off then resets . damage may occur to the device under extreme fault. please prevent the loss of the regulator when this protection operates, by reducing the input voltage or providing better heat efficiency. ? esd mm : 200pf 0 ? 150v or more hbm : 100pf 1.5k ? 2000v or more
tk634xxamf gc3-n022 page 28 13. package outline ? 4-lead-small outline non-leaded package with heat sink : hson1214-4 1 2 3 4 1 2 3 4 1.2 0.05 + ? 1.4 0.05 + ? 0.15 0.05 + ? 0.075 0.05 + ? 0.6 0.05 + ? 0.9 +0.05 ? 0.2 0.05 + ? 0.13 0.03 + ? 0.2 0.05 + ? 0.1 0.05 + ? (0.075) (0.2) 0.40 0.60 0.25 1.00 1.80 0.5 reference mount pad 1 pin mark 0.55 0.05 + ? 0.5 unit : mm package structure and others package material : epoxy resin terminal material : copper alloy terminal finish : ni/pd/au caution in printed circuit board layout in addition to the normal pins, this plastic package has exposed metal tabs. this tab is electrically connected to the gnd of internal chip. avoid electrical contact with this tab from external print traces, adja cent components other than gnd, etc. this tab is recommended to be solder-mounted so as to enhance heat release.
tk634xxamf gc3-n022 page 29 marking part number marking code part number marking code part number marking code tk63415amf d15 tk63401amf d01 tk63435amf d35 tk63418amf d18 tk63429amf d29 tk63440amf d40 tk63425amf d25 tk63430amf d30 tk63426amf d26 tk63431amf d31 tk63427amf d27 tk63432amf d32 tk63428amf d28 tk63433amf d33
tk634xxamf gc3-n022 page 30 14. notes ? please be sure that you carefully discuss your planned purchase with our office if you intend to use the products in this application manual under conditions where particularly extreme standards of reliability are required, or if you intend to use products for applications other than those listed in this application manual. z power drive products for automobile, ship or aircraft transport systems; steerin g and navigation systems, emergency signal communications systems, and any system other than those mentioned above which include electronic sensors, measuring, or display devices, and which could cause major damage to life, limb or property if misused or failure to function. z medical devices for measur ing blood pressure, pulse, etc., treatment units such as coronary pacemakers and heat treatment units, and devices such as artificial organs and artificial limb systems which augment physiological functions. z electrical instruments, equipment or systems used in disaster or crime prevention. ? semiconductors, by nature, may fail or malfunction in spite of our devotion to improve product quality and reliability. we urge you to ta ke every possib le precaution against physical injuries, fire or other damages which may cause failure of our semiconductor products by taking appropriate measures, including a reasonable safety margin, malfunction preventive practices and fire-proofing when designing your products. ? this application manual is effective from jul. 2007. note that the contents are subject to change or discontinuation without notice. when placing orders, please confirm specifications and delivery condition in writing. ? toko is not responsible for any problems nor for any infringement of third party patents or any other intellectual property rights that may arise from the use or method of use of the products listed in this application manual. moreover, this application manual does not signify that toko agrees implicitly or explicitly to license any patent rights or other intellectual property rights which it holds. ? none of the ozone depleting substances(ods) under the montreal protocol are used in our manufacturing process. 15. offices if you need more information on this product and other toko products, please contact us. ? toko inc. headquarters 1-17, higashi-yukigaya 2-chome, ohta-ku, tokyo, 145-8585, japan tel: +81.3.3727.1161 fax: +81.3.3727.1176 or +81.3.3727.1169 web site: http://www.toko.co.jp/ ? toko america web site: http://www.toko.com/ ? toko europe web site: http://www.tokoeurope.com/ ? toko hong kong web site: http://www.toko.com.hk/ ? toko taiwan web site: http://www.tokohc.com.tw/ ? toko singapore web site: http://www.toko.com.sg/ ? toko seoul web site: http://www.toko.co.kr/ ? toko manila web site: http://www.toko.com.ph/ ? toko brazil web site: http://www.toko.com.br/ semiconductor division your distributor

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