View TK11240CUIBN_6800977.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ic data sheet ldo regulator with on/off switch tk112xxc meeting your needs
toko inc. ic data sheet tk112xxc gc3-h026 a page 2 features very low dropout voltage . (vdrop=105 mv at 100ma ) very good stability ( cl=0.1 m f is stable for any type capacitor with 2.5 v vout) high precision output voltage ( 1.5% or 5 0mv ) good ripple rejection ratio (80db at 1khz) wide operating voltage range (1.8v ~ 14.5v) peak output current is 480ma.(10% down point) built-in short circuit protection built-in thermal shutdown suitable for very low noise app li cation s built-in on/off control ( 0.1 m a max standby current ) high on very small surface mount packages sot23l / sot89 package built-in reverse bias over current protection description the tk112xxc is an integrated circuit with a silicon monolithic bipolar structure. the regulator is of the low saturation voltage output type with very little quiescent current (65 m a). the pnp power transistor is built-in. the i/o voltage difference is 0.17v (typical) when a current of 200ma is supplied to the system. because of the low voltage drop, the voltage source can be effectively used; this makes it very suitable for battery powered equipment. the on/off function is built into the ic. the current during standby mode becomes very small ( pa level). the output voltage is available from 1.5 to 10.0v in 0.1v step s . the output voltage is trimmed with high accuracy. this allows the optimum voltage to be selected for the equipment. the over current sensor circuit and the reverse-bias protection circuit are built-in. it is a very rugged design because the esd protection is high. therefore, the tk112xxc can be used with confidence. when mounted on the pcb, the power dissipation rating becomes about 600mw / 900mw, even though the package s are very small. the tk112xxc features very high stability in both dc and ac. the capacitor on the output side provides stable operation with 0.1 m f with 2.5v vout. a capacitor of any type can be used; however, the larger this capacitor is, the better the overall characteristics are.
toko inc. ic data sheet tk112xxc gc3-h026 a page 3 boldface type applies standard voltage. v out v code v out v code v out v code v out v code 1.5 v 15 2.5 v 25 3.5 v 35 4.5 v 45 1.6 16 2.6 26 3.6 36 4.6 46 1.7 17 2.7 27 3.7 37 4.7 47 1.8 18 2.8 28 3.8 38 4.8 48 1.9 19 2.9 29 3.9 39 4.9 49 2.0 20 3.0 30 4.0 40 5.0 50 2.1 21 3.1 31 4.1 41 2.2 22 3.2 32 4.2 42 2.3 23 3.3 33 4.3 43 2.4 24 3.4 34 4.4 44 please contact your authorized toko representative for voltage availability operating temp. range c :-30 ~ 80 c i :-40 ~ 85 c voltage code ex 3.3v : 33 5.0v : 50 tape/reel code l : sot-23l b : sot89 package code m : sot23l u : sot89 ordering information t k 1 1 2 c m (special sorting) n : noise l
toko inc. ic data sheet tk112xxc gc3-h026 a page 4 c rank device absolute maximum ratings parameters symbol limiting values unit supply voltage v cc max - 0.4 ~ 16 v reverse bias vrmax - 0.4 ~ 6 v np pin voltage vnpmax - 0.4 ~ 5 v control pin voltage vcontmax - 0.4 ~ 1 6 v storage temperature range tstg - 55 ~ 150 c operating voltage range vop 1.8 ~ 14.5 v operating temperature range top - 30 ~ 80 c short circuit current ishort 500 ma power dissipation internally limited m : 600mw mounted (reference) u : 900mw mounted (reference) electrical characteristics test condition vtest =vout typ +1 v vcont=1.8v (ta= 25 c ) parameters symbol min t yp max unit condition output voltage vout 1.5% or 5 0mv iout = 5ma line regulation linreg 0 6 m v d v=5v vtest =vout typ +1 v---- vout typ +6v 0.5 1.1 % 5ma < iout < 100ma 1.0 2.2 % 5ma < iout < 200ma load regulation 2.5v vo 5.0v loareg 1.6 3.7 % 5ma < iout < 300ma 0.8 1.8 % 5ma < iout < 100ma 1.5 3.4 % 5ma < iout < 200ma 1.5v vo 2.4v loareg 2.4 5.3 % 5ma < iout < 300ma 105 170 mv i o ut = 10 0ma 170 270 mv i o ut = 20 0ma 235 370 mv i o ut = 300 ma (2.4v vout) vdrop 235 370 mv i o ut = 270 ma (2.1v vout < 2.4v) dropout voltage 1.5v vout 2.0v : no regulation because of vop min =1.8v maximum output current ioutmax 380 480 ma ( vout typ . 0.9) quiescent current iq 65 90 m a i o ut =0ma excluding icont standby current i stan d by 0 0.1 m a vcc= 8 v , vcont 0.15v off state ground pin current ignd 1.8 3.0 ma iout=100ma control terminal specification ( pull down resistor = 500k) note 1 control current icont 5 10 m a vcont = 1. 8v on state 1. 6 v on state control voltage vcont 0. 6 v o ff state np treminal voltage v n p 1.28 v vo vo/ta typ= 3 5 ppm/ c reference value out put noise vno 0.14 ~ 0.25 m v / ? hz at1khz reference value note 1 : the input current decreases to the pa level by connecting the control terminal to gnd. (off state). the pull-down resistor is 500k w . general note: limits are guaranteed by production testing or correction techniques using statistical quality control (sqc) methods. unless otherwise noted. v test =vout typ +1 v ; il=1ma ( t j =25 c ) the operation of - 30 c ~ - 80 c is guaranteed in the design by a usual inspection. general note: exceeding the ? absolute maximum rating ? may damage the device general note: connecting a capacitor to the noise by pass pin can decrease the output noise voltage general note: output noise is 0.14-0.25 m v/ ? hz at 1khz : 23 ~ 75 m vrms at bw400-80khz general note: the ripple rejection is 84db at 400hz and 80db at 1khz. [ cl= 1.0 m f,c np =0. 0 1 m f,vnois= 2 00mv rms ,vin=v out typ +1.5v,io ut = 1 0ma ]
toko inc. ic data sheet tk112xxc gc3-h026 a page 5 i rank absolute maximum ratings are same as c rank operating temperature range top = - 4 0 ~ 8 5 c operating voltage range vop=2.1v ~ 14.5v o ther items are same as c rank. boldface type appl ies over the full operating temperature range . ( - 4 0 ~ 8 5 c ) vtest =vout typ +1 v iout=5ma parameters symbol min t yp max unit condition output voltage vout 1.5% or 5 0mv ( 2.5% or 8 0mv ) iout = 5ma line regulation linreg 0 6 8 m v d v=5v 0.5 1.1 1.3 % 5ma < iout < 100ma 1.0 2.2 2.8 % 5ma < iout < 200ma load regulation 2.5v vo 5.0v loareg 1.6 3.7 5.3 % 5ma < iout < 300ma 0.8 1.8 2.0 % 5ma < iout < 100ma 1.5 3.4 4.1 % 5ma < iout < 200ma 1.5v vo 2.4v loareg 2.4 5.3 6.5 % 5ma < iout < 300ma 105 170 200 mv i o ut = 10 0ma 170 270 320 mv i o ut = 20 0ma vdrop 235 370 440 mv i o ut = 300 ma (2.4v vout) (2.2v,2.3v : no regulation) dropout voltage 1.5v vout 2.1v : no regulation because of vop min =2.1v maximum output current ioutmax 380 340 480 ma vout= ( vout typ . 0.9) quiescent current iq 65 90 100 m a i o ut =0ma except icont standby current i standby 0 0.1 0.5 m a vcont 0.15v 0 ff state gnd pin current ignd 1.8 3.0 3.6 ma iout=100ma control terminal specification ( pull down resistor =500k ) n ote 1 control current icont 5 10 12 m a vcont = 1. 8v on state 1. 6 1.8 v on state control voltage vcont 0. 6 0.35 v o ff state np terminal voltage v n p 1.28 v vo vo/ta typ= 3 5 ppm/ c reference value out put noise vno 0.14 ~ 0.25 m v / ? hz at1khz reference value note 1 : the input current decreases to the pa level by connecting the control terminal to gnd. (off state). the pull-down resistor is 500 k w . general note: limits are guaranteed by production testing or correction techniques using statistical quality control (sqc) methods. unless otherwise noted. v test =vout typ +1 v ; il=1ma ( t j =25 c ) the operation of -30 c -80 c is guaranteed in the design by a usual inspection. general note: exceeding the ? absolute maximum rating ? may damage the device general note: connecting a capacitor to the noise by pass pin can decrease the output noise voltage general note: output noise is 0.14-0.25 m v/ ? hz at 1khz : 23 ~ 75 m vrms at bw400-80khz general note: the ripple rejection is 84db at 400hz and 80db at 1khz. [ cl= 1.0 m f,c np =0. 0 1 m f,vnois= 2 00mv rms ,vin=v out typ +1.5v,io ut = 1 0ma ]
toko inc. ic data sheet tk112xxc gc3-h026 a page 6 application block diagram pin layout top view gnd bandgap reference cont. vin vout constant current source control circuit thermal & over curr ent protect np 50 0k gnd vin 1 2 3 5 4 vout on/off control np ( vref) sot89 note : the terminal connection reverses between sot-23l and sot89. iin v cl= 0.22 m f ( cl= 1.0 m f ) iout a icont vcont a cin= 0.1 m f cn p =0. 1 m f v in cont. vin vout gnd np gnd vin 1 2 3 4 vout on/off control gnd np ( vref) 6 sot-23l 5 gnd terminal 2 and 5 are connected internally.
toko inc. ic data sheet tk112xxc gc3-h026 a page 7 input /output capacitors linear regulators require input and output capacitors in order to maintain the regulator's loop stability. if a 0.1 m f capacitor is connected to the output side, the ic provides stable operation at any voltage in the practical current region. however, increase the cl capacitance when using the ic in the low current region and low voltage. otherwise, the ic oscillates. the equivalent series resistance (esr) of the output capacitor must be in the stable operation area. however, it is recommended to use as large a value of capacitance as is practical. the output noise and the ripple noise decrease as the capacitance value increases. esr values vary widely between ceramic and tantalum capacitors. however, tantalum capacitors are assumed to provide more esr damping resistance, which provides greater circuit stability. this implies that a higher level of circuit stability can be obtained by using tantalum capacitors when compared to ceramic capacitors with similar values. the input capacitor is necessary when the battery is discharged, the power supply impedance increases, or the line distance to the power supply is long. this capacitor might be necessary on each individual ic even if two or more regulator ics are used. it is not possible to determine this indiscriminately. please confirm the stability while mounted. the ic provides stable operation with an output side capacitor of 0. 1 m f ( vout 3 2.5 v). if it is 0.1 m f or more over the full range of temperature, either a ceramic capacitor or tantalum capacitor can be used without considering esr. it is not possible to say indiscriminately. please confirm stability while mounted. output voltage, output current vs. stable operation area the above graph s show stable operation with a ceramic capacitor of 0.1uf ( excluding the low current region ) . if the capacitance is not increased in the low voltage, low current area, stable operation may not be achieved. please select the best output capacitor according to the voltage and current used . the stability of the regulator improves if a big output side capacitor is used (the stable operation area extends .) please use as large a capacitance as is practical. although operation above 150 ma has not been described, stability is equal to or better than operation at 150 ma. generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. please consider both characteristics when selecting the part. the b curve s are the recommend characteristics. for evaluation kyocera : cm05b104k10ab , cm05b224k10ab , cm105b104k16a , cm105b224k16a , cm21b225k10a murata : grm36b104k10 , grm42b104k10 , grm39b104k25 , grm39b224k10 , grm39b105k6.3 iout [ma] cl 3 0.33 m f all stable iout [ma] cl 3 0.33 m f all stable iout [ma] cl 3 0.68 m f all stable iout [ma] cl 3 1.0 m f all stable iout [ma] cl 3 2.2 m f all stable 0.01 0.1 1 10 100 0 .5 50 100 150 esr[ w ] vout=5.0v 0.01 0.1 1 10 100 150 0 .5 50 100 esr [ w ] vout=4.0v stable area cl=0.068 m f vout= 2.5v, 3.0v 0.01 0.1 1 10 100 0 .5 50 100 150 esr[ w ] stable area cl=0. 068 m f vout= 1.8 v , 2.2 v 0.01 0.1 1 10 100 2.0 50 100 150 esr[ w ] vout=1.5v 0.01 0.1 1 10 100 4.0 50 100 150 esr [ w ] stable area cl= 0.1 m f stable area cl=0.068 m f stable area cl=0. 068 m f the recommended value : cin=cl=0.22 m f(mlcc) iout 3 0.5ma. cin=0.22 m f ~ 0.1 m f vout cl=0.22 m f ~ 0.1 m f % capacitance vs . voltage 0 bias voltage( v ) cap 2 4 6 8 10 50 60 70 80 90 100 b curve f curve capacitance vs. temperature % 60 50 80 90 100 70 cap -50 -25 0 25 50 75 100 ta( c ) b curve f curve
toko inc. ic data sheet tk112xxc gc3-h026 a page 8 output noise increase cnp to decrease the noise. the recommended cnp capacitance is 6800pf(682) ~ 0.22 m f(224). the amount of noise increases with the higher output voltage s . tk 112 30 c cn p vs . noise iout=30ma bpf=400hz ~ 80khz tk 112 30 c m cin=10 m f iout=10ma tk11230c cnp vs noise cnp ?i?? f ?j noise ?i m vrms) 0 50 100 150 200 250 300 1 10 100 1000 10000 100000 cl=0.22 m f cl=0.47 m f cl=1.0 m f cl=2.2 m f cl=10 m f iout= 30ma bpf:400 ~ 80khz cl= tantal cl= mlcc tk11230c iout vs noise 35 40 45 50 55 60 65 70 75 80 85 90 95 0 50 100 150 200 250 300 iout (ma) noise( m vrms) cnp= 10000pf bpf:400 ~ 80khz cl= tantal cl=0.22uf cl=0.47uf cl=1.0uf cl=2.2uf cl=10uf tk11230c iout vs . noise 35 40 45 50 55 60 65 70 75 80 85 90 95 0 50 100 150 200 250 300 iout (ma) noise( m vrms) cnp= 10000pf bpf:400 ~ 80khz cl= mlcc cl=0.22uf cl=0.47uf cl=1.0uf cl=2.2uf cl=10uf noise level(1/f) 0.01 0.1 1 10 10 100 1k 10k 100k frequency ?i hz) noise( m v/ ? hz) cl=0.22 m f ?i ceramic) cnp=0.01 m f cnp=0.1 m f c np =1000pf noise ( m vrms) tk112xxc vout vs noise 10 20 30 40 50 60 70 80 90 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 vout (v) iout=30ma cnp=1 0000pf cl=0.22 m f (mlcc) bpf :400 ~ 80khz
toko inc. ic data sheet tk112xxc gc3-h026 a page 9 ripple rejection the ripple rejection 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 while operating. cl gnd 112 xx v out v in cnp 0.1 m f vcont cl=1 uf ( tantal) cl=1uf (mlcc) cl=0.22uf (mlcc) cl=0.22 uf ( tantal) a : cref=0.1uf b : cref=0.001uf ripple rejection vs . iout -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0 50 100 150 200 250 300 iout (ma) r.r(db) cnp=0.01 m f cl=0.22 m f ?i ceramic) vin=5.0v vripple=500mvp-p freq=1khz freq=400hz ripple rejection at low vin -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 .0 vin- vout_ typ (v) r . r (db) cin : none vripple=100mvp-p freq:1khz cnp :0.01 m f cl:0.22 m f ( ceramic ) vin= 5.0v vout=3.0v iout=10ma vr=500mvp- p f=100 ~ 1mhz cnp=0.1uf a : cl=10uf ( tantal) b : cl=0.22uf ( tantal)
toko inc. ic data sheet tk112xxc gc3-h026 a page 10 tk112xxcm transient on / off transient 112xxc cnp cl iout=30ma cin 1 m f vin =vout typ +1v 1 3 6 4 vcont=0v ? 2v (f=100hz) cl= variable cnp=0.001 m f cl= variable cnp=0.01 m f cnp= variable cl=1 m f cl= variable cnp=0.01 m f io=30ma the rise time of the regulator depends on cl and cnp ; the fall time depends on cl. 1.0v/div 250 m s/div vou t vcont off on cnp= 0.001 m f 0.1 m f 0.01 m f 1.0v/div 10 m s/div vou t vcont off on cl= 0.22 m f 2.2 m f 1.0 m f 1.0 m f , 2.2 m f 1.0v/div 50 m s/div vou t vcont off on cl= 0.22 m f 1.0v/div 250 m s/div vou t vcont off on 1.0 m f 2.2 m f cl= 0.22 m f
toko inc. ic data sheet tk112xxc gc3-h026 a page 11 load transient 112xxc cnp cl cin 1 m f vcont 1.8v vin =vout typ +1v 1 3 6 4 iout on ? off 0.01 m f when the capacitor on the load side is increased, the load change becomes small er . the no load voltage change can be greatly improved by delivering a little load current to ground (see right curve above). increase the load side capacitor when the load change is fast or when there is a large current change. in addition, at no load, the voltage change can be reduced by delivering a little load current to ground. line transient vout iout 3ma 33ma 3ma 33ma cl=1.0 m f 2.2 m f cl=0.22 m f cl= variable cnp=0.01 m f vout vin d 1v cl=0.22 m f cl=1.0 m f cl=2.2 m f cl= variable cnp=0.01 m f vout vin d 1v cnp=0.001 m f cnp=0.01 m f cnp=0.1 m f cnp= variable cl=1 m f vout iout 33ma 30ma 3ma 0ma 30ma 33ma 0ma 3ma iout=0 ? 30ma iout=3 ? 33ma iout=0 ? 30ma , 3 ? 33ma vout iout iout=0 ? 30ma iout=3 ? 33ma magnification
toko inc. ic data sheet tk112xxc gc3-h026 a page 12 load regulation 0 50 100 150 200 250 300 iout (ma) d vout (mv) vo=3.0v -80 -70 -60 -50 -40 -30 - 10 0 10 -20 vo=2.0v vo=5.0v -35 -30 -25 -20 -15 -10 -5 0 5 10 15 0 5 10 15 20 vin(v) d vout (mv) vo1.5v vo2.0v vo3.0v vo4.0v vo5.0v line regulation vdrop -500 -450 -400 -350 -300 -250 -200 -150 -100 -50 0 0 100 200 300 400 500 iout (ma) vdrop (mv) regulation point 100 d vin(mv) -300 -200 -100 0.0 100 d vout (mv) iout=300ma iout=0ma iout=0ma ,50ma,100ma,150ma,200ma,250ma,300ma vcont vs. icont 0 5 10 15 20 0.0 1.0 2.0 3.0 4.0 5.0 v cont (v) i cont ( m a) i cont vout
toko inc. ic data sheet tk112xxc gc3-h026 a page 13 standby current 1.e-12 1.e-11 1.e-10 1.e-09 1.e-08 1.e-07 1.e-06 1.e-05 1.e-04 0 2 4 6 8 10 12 14 16 18 20 vin(v) istandby (a) short circuit current 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 100 200 300 400 500 iout (ma) vout (v) gnd current 0 1 2 3 4 5 6 7 8 9 10 11 12 0 50 100 150 200 250 300 iout (ma) ignd (ma) vo1.5v vo2.0v vo3.0v vo4.0v vo5.0v reverse bias current 0 10 20 30 40 50 60 0 1 2 3 4 5 6 7 8 9 10 vrev (v) irev ( m a) vout =5v vout =2v vout =4v vout =3v ioutmax (ma) ioutmax at low vop tk11215 ~ tk11224 0 50 100 150 200 250 300 350 400 450 500 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 v op ?i v)
toko inc. ic data sheet tk112xxc gc3-h026 a page 14 temperature characteristics (ta: ambient temperature) iout (ma) max iout 340 3 60 3 80 4 00 4 20 4 40 4 60 4 80 5 00 -50 -25 0 25 50 75 100 ta( c ) vout= ( vout typ . 0.9 gnd current i gnd (ma) iout= 3 00ma 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 -50 -25 0 25 50 75 100 ta( c ) io= 50 ma io= 100 ma io= 150 ma io=200ma on/off point vcont (v) 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 -50 -25 0 25 50 75 100 ta( c ) vcont ( onpoint) vcont ( offpoint) control current icont ( m a) 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 -50 -25 0 25 50 75 100 ta( c ) vcont= 1.8 v vcont= 4.0v vcont=2.0 v vcont=3.0v dropout voltae vdrop (mv ) -50 -25 0 25 50 75 100 ta( c ) 0 50 100 150 200 250 300 350 io= 300 ma io= 100 ma io= 150 ma io=200ma io= 50 ma 150 200 250 300 350 400 450 500 550 -50 -25 0 25 50 75 100 ta( c ) ioutmax (ma) vin=1.9/2.0/2.1/2.2/2.3/2.4/2.5v output current v in = 1.9 v vin= 2.2v v in =2.0 v vin=2.1v
toko inc. ic data sheet tk112xxc gc3-h026 a page 15 output voltage vs. temperature characteristics -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 -50 -25 0 25 50 75 100 ta( ?? ) d vout (mv) vout=3.0v -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 -50 -25 0 25 50 75 100 ta( c ) d vout (mv) vout=2.0v -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 d vout (mv) vout=4.0v -50 -25 0 25 50 75 100 ta( ?? ) d vout (mv) vout=1.5v -50 -25 0 25 50 75 100 ta( c ) -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 d vout (mv), vout=5.0v -50 -25 0 25 50 75 100 ta( ?? ) -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20
toko inc. ic data sheet tk112xxc gc3-h026 a page 16 layout pcb material : glass epoxy t=0.8mm sot23l-6 sot89-5 derating curve 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 the small size. heat is carried away by the device being installed on the pcb. this value changes by the material and the copper pattern etc. of the pcb. the losses are approximately 600mw (sot-23l ) : 900mw(sot-89) . enduring these losses becomes possible in a lot of applications operating at 25 c. determining the thermal resistance when mounted on a pcb. the operating chip junction temperature is shown by tj= q ja pd + ta. tj of the ic is set to about 150 c. pd is a value when the overtemperature sensor is made to work. pd is easily obtained. mount the ic on the print circuit board. short between the output pin and ground. after that, raise input voltage from 0v to evaluated voltage (see*1) gradually. at shorted the output pin , the power dissipation p d can be expressed as p d =vin iin. the input current decreases gradually as the temperature of the chip becomes high. after a while, it reaches the thermal equilibrium. use this currrent value at the thermal equilibrium. in almost all the cases, it shows 600mw(sot23l-6) ?f 900mw(sot89-5) or more. * 1 i n the case that t he power, vin ishort( short circuit current ), becomes more than twice of the maximum rating of its power dissipation in a moment, there is a possibility that the ic is destroyed before internal thermal protection works. pd is obtained by the normal temperature in degrees. the current that can be used at the highest operating temperature is obtained from the graph of the figure below. procedure (do when pcb mounted). 1. pd is obtained (vin iin when the output side is short-circuited). 2. pd is plotted on the horizontal line to 25 c. 3. pd is connected with the point of 150 c by the straight line ( bold face line) . 4. a line is extended vertically above the point of use temperature in the design. for instance, 75 c is assumed (broken line) . 5. extend the intersection of the derating curve (fat solid line) and (broken line) to the left and read the pd value . 6 . dpd ? ( vinmax - vout)= iout (at 75 c) the maximum current that can be used at the highest operating temperature is: iout @ dpd ? ( vinmax - vout). please do derating with 4mw/ c at pd=600mw and 25 c or more. thermal resistance is ( q ja=250 c / w). vout on/off vin please do derating with 7.2mw/ c at pd=900mw and 25 c or more. thermal resistance is ( q ja =138 c / w) 6 00 sot-89 - 7.2 mw/ c 25 50 c 100 150 0 p d( m w ) (85) c 900 sot-23 - l -4 . 8 mw/ c 0 on/off vin vout ta (t a=25 c) 150 = q ja pd + 25 q ja p d = 125 q ja = ( 125 / pd ) ( c / m w ) pd ( m w) 25 50 100 150 c 0 (75) dpd pd 2 3 4 5
toko inc. ic data sheet tk112xxc gc3-h026 a page 17 application hint on / o ff control it is recommended to turn the regulator off when the circuit following the regulator is non-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. the pulldown resistance (500k w ) is built into the control terminal . the noise and the ripple rejection characteristic s depend on the capacitance on the vref terminal . the ripple rejection characteristic of the low frequency region improves by increasing the capacitance of cnp. a standard value is cnp=0.068 m f. increase cnp in a design with important output noise and ripple rejection requirements . the ic will not be damaged if the capacitor value is increased. the on/off switch ing speed changes depending on the np terminal capacitance. the switch ing speed slows when the capacitance is large. parallel connected on/off control current boost for current boost applications, use the products below. a low voltage drop, high current regulator can be easily made. tk714xx only the pnp transistor for the current boost is external. tk732 xx ( for iout=10a max regulator) built-in short circuit protect ion : a constant current can be set by an external resistor. the figure at the left illustrates multiple regulators being controlled by a single on/off control signal. there is a possibility of overheating because the power loss of the low voltage side ic (tk11220c) 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. 2.0v 5v 3.3v on/off cont. v in tk 112 50 c tk 112 3 3c tk 112 20 c r reg v sat op on/off cont.
toko inc. ic data sheet tk112xxc gc3-h026 a page 18 definition of term s the output voltage tables are specified with a test voltage of vin=output voltage ( typ.) + 1v . output voltage ( vout ) the output voltage is specified with (vin = output voltage ( typ .) + 1v) and output current (iout=5ma). maximum output current ( iout max ) the output current is measured when the output voltage decreases to ( vout typ . x 0.9) . the input voltage is (output voltage ( typ .) + 1v). the maximum output current is measured in a short time so that it is not influence d by the temperature of the chip. the output current decreases with low voltage operation. please refer to the "low input voltage-output current" graph for 2.1v or less. dropout voltage ( vdrop ) 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 up on the load current ( iout) and the junction temperature ( tj). the input voltage is gradually decreased below the test voltage. it is the voltage difference between the input and the output when the output voltage decreases by 100mv. line regulation ( lin reg ) 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 (output voltage ( typ.) + 1v) to (output voltage ( typ.) + 6v). this measurement is not influence d by the temperature of the ic and is measured in a short time. load regulation ( loa d reg ) load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. the input voltage is set to (output voltage ( typ.) + 1v). the o utput voltage change is measured as the load current changes from to 5 to 100ma and from 5 to 200ma. this measurement is not influence d by the temperature of the ic and is measured in a short time. quiescent current ( iq ) the quiescent current is the current which flows through the ground terminal under no load conditions (io=0ma) . 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 the input voltage = ( vout + 1.5v ) , io ut = 1 0ma, cl= 1.0 m f and c np =0.01 m f an alternating current source of (f = 1 khz and 200 mv rms ) is superimposed to the power-supply voltage. ripple rejection is the ratio of the ripple content of the output vs. the input and is expressed in db. it is typically about 80db at 1khz. the ripple rejection improves when the value of the capacitor at the noise by pass terminal in the circuit is large. however, the on/off response worsens. standby current . ( istandby ) standby current is the current which flows in to the regulator when the control voltage is made 0 volts. it is measured with an input voltage of 8v .
toko inc. ic data sheet tk112xxc gc3-h026 a page 19 protection circuit s thermal sensor the thermal sensor protects the device if the junction temperature exceeds the safe value (tj=1 5 0 c). this temperature rise can be caused by extreme heat, excessive power dissipation caused by large output voltage drops, or excessive output current. the regulator will shut off when the temperature exceeds the safe value. as the junction temperature decreases, the regulator will begin to operate again. under sustained fault conditions, the regulator output will oscillate as the device turns off then resets. please improve heat radiation or lower the input electric power. when heat radiation is poor, the forecast package loss is not obtained. * i n the case that t he power, vin ishort ( short circuit current ), becomes more than twice of the maximum rating of its power dissipation in a moment, there is a possibility that the ic is destroyed before internal thermal protection works. reverse bias current the reverse bias protection prevents excessive current from flow ing through the ic even if the input voltage becomes 0 with voltage impressed on the output side (input short-circuit ed to gnd ) . the max imum reverse bias voltage is 6v. esd .......... mm 200pf 0 w 200v min hbm 1 00pf 1.5k w 200 0 v min v out v in gnd
toko inc. ic data sheet tk112xxc gc3-h026 a page 20 outline ; pcb ; stamps sot23l-6 v out v code v out v code v out v code v out v code 1.5 v 15 2.5 v 25 3.5 v 35 4.5 v 45 1.6 16 2.6 26 3.6 36 4.6 46 1.7 17 2.7 27 3.7 37 4.7 47 1.8 18 2.8 28 3.8 38 4.8 48 1.9 19 2.9 29 3.9 39 4.9 49 2.0 20 3.0 30 4.0 40 5.0 50 2.1 21 3.1 31 4.1 41 2.2 22 3.2 32 4.2 42 2.3 23 3.3 33 4.3 43 2.4 24 3.4 34 4.4 44 the output voltage table indicates the standard value when manufactured. please contact your authorized toko representative for voltage availability voltage code m m r x x 0.4 +0.15 - 0.05 0.1 5 - 0.32 +0.15 - 0.05 0.1 0.95 0.95 typecode e e recommended mount pad 0.95 0.95 1.0 0.6 3.0 e e e 1 1.4max 2.2 0.2 0.15 0.1 0 ~ 0.1 1.2 0.2 0.3 3.3 0.3 0.4 0.2 15omax +0.3 - 0.1 (3.4) 3.5 0.1 molded resin with body : epoxy resin lead frame : copper alloy treatment : solder plating(5 ~ 15 m m) marking method : ink or laser weight : 0.0 23 g country of origin :japan or korea unit : mm general tolerance : 0.2
toko inc. ic data sheet tk112xxc gc3-h026 a page 21 sot89-5 v out v code v out v code v out v code v out v code 1.5 v 15 2.5 v 25 3.5 v 35 4.5 v 45 1.6 16 2.6 26 3.6 36 4.6 46 1.7 17 2.7 27 3.7 37 4.7 47 1.8 18 2.8 28 3.8 38 4.8 48 1.9 19 2.9 29 3.9 39 4.9 49 2.0 20 3.0 30 4.0 40 5.0 50 2.1 21 3.1 31 4.1 41 2.2 22 3.2 32 4.2 42 2.3 23 3.3 33 4.3 43 2.4 24 3.4 34 4.4 44 the output voltage table indicates the standard value when manufactured. please contact your authorized toko representative for voltage availability unit : mm general tolerance : 0.2 molded resin with body : epoxy resin lead frame : copper alloy treatment : solder plating(5 ~ 15 m m ) marking method : ink or laser weight : 0.0 53 g country of origin : japan 1.0 1.0 2.5 0.2 4.5 +0.5 - 0.3 0.44 max voltage code 0.49 max 0.49 max 0.49 max 1.6 4.5 0.2 0.49 max 0.49 max 0.54 max 1.0 2.5 0.2 0.4 x x lot no type code r: 112xx 0.7max 1.0 0.7max 1.5 1.5 2.0 1.5 0.7 0.8 1.5 0.7 45 recommended mount pad e e 1.5 0.2 1.5 1.5 3.0 e e e'
toko inc. ic data sheet tk112xxc gc3-h026 a page 22 note please be sure that you carefully discuss your planned purchase with our office if you intend to use the products in this data sheet 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 data sheet. l power drive products for automobile, ship or aircraft transport systems; steering 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. l medical devices for measuring 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. l electrical instruments, equipment or systems used in disaster or crime prevention. n semiconductors, by nature, may fail or malfunction in spite of our devotion to improve product quality and reliability. we urge you to take every possible 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. n this data sheet is effective from oct. 200 2 . note that the contents are subject to change or discontinuation without notice. when placing orders, please confirm specifications and delivery condition in writing. n 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 data sheet. moreover, this data sheet does not signify that toko agrees implicitly or explicitly to license any patent rights or other intellectual property rights which it holds. n none of ozone depleting substances(ods) under the montreal protocol is used in manufacturing process of us. if you need more information on this product and other toko products, please contact us. office n 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/ n toko america w eb site : http://www.toko.com/ n toko europe w eb site : http://www.tokoeurope.com/ n toko hong kong w eb site : http://www.toko.com.hk/ n toko taiwan w eb site : http://www.tokohc.com.tw/ n toko singapore w eb site : http://www.toko.com.sg/ n toko seoul w eb site : http://www.toko.co.kr/ n toko manila w eb site : http://www.toko.com.ph/ n toko brazil w eb site : http://www.toko.com.br/ your distributor meeting your needs to build the quality relied by costomers

▲Up To Search▲

Price & Availability of TK11240CUIBN

	To Download TK11240CUIBN Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .