ts34063a 1-8 2005/02 rev. a TS34063AA dc to dc converter controller supply voltage range 3 v to 40v output driving current 1.5a oscillator frequency up to 100khz general description the ts34063a is a monolithic switching r egulator and subsystem intended for use as dc to dc converter. it contains an internal temperature compensated referenc e, comparator, controlled duty cycle osc illator with an active peak current limit circuit, drive and a high current output switch. the ts34063a is specifically designed to be incorporat ed in step-up, step-down and vo ltage inverting converter applications. the ts34063a is offered in sop-8 and dip-8 package. features ? power forward control circuit ? operating voltage form 3v to 40v ? low standby current ? current limit adjustable ? output switch current up to 1.5a ? variable oscillator frequency up to 100khz (max) ? output voltage adjustable pin descriptions name description sc switch collector se switch emitter ct timing capacitor gnd ground comp. comparator inverting input vcc vcc collector ipk ipk sense vdriver driver applications ? charger ? xd-rom, xdsl product ? dc to dc converter s ordering information part no. operating temp. (ambient) package ts34063acd dip-8 ts34063acs -20 ~ +85 o c sop-8 block diagram pin assignment: 1. sc 2. se 3. ct 4. gnd 5. comp. 6. vcc 7. ipk 8. vdriver .com .com .com 4 .com u datasheet
ts34063a 2-8 2005/02 rev. a absolute maximum rating supply voltage v cc 40 v comparator input voltage range v fb - 0.3 ~ 40 v switch collector output voltage v c(sw) 40 v switch emitter voltage v e(sw) 40 v switch collector to emitter voltage v ce(sw) 40 v driver collector voltage vc(driver) 40 v driver collector current (note 1) ic(driver) 100 ma output switching current i sw 1.5 a power dissipation dip-8 sop-8 pd 1.0 0.5 w operating junction temperature range t j -0 ~ +125 o c storage temperature range t stg -65 ~ +150 o c note: maximum package power dissi pation limits must be observed electrical characteristics (v cc =5v, ta =25 o c; unless otherwise specified.) parameter symbol test conditions min typ max unit oscillator (osc) frequency f osc c t = 1nf, vpin5= 0v 24 33 42 khz charge current i charge v cc = 5v ~ 40v -- 30 -- ua discharge current i discharge v cc = 5v ~ 40v -- 200 -- ua discharge to charge current ratio i discharge / i charge pin7 to vcc -- 6.5 -- -- current limit sense voltage v ipk(sense) i discharge = i charge 250 -- 350 mv output switch (note1) saturation voltage v ce(sat) i sw = 1a, pin1,8 connected) -- 1.0 1.3 v saturation voltage v ce(sat) i sw = 1a, id=50ma -- 0.45 0.7 v dc current gain h fe i sw = 1a, vce= 0.5v -- 75 -- -- collector off-state current i c(off) vce= 40v -- 0.01 100 ua comparator threshold voltae v ref 1.225 1.25 1.275 v line regulation regline v cc = 3v ~ 40v -- -- 6 mv total device supply current i cc v cc = 5v ~ 40v, c t = 1nf, pin7=vcc, pin5>vth, pin2=gnd, remaining pins open -- 1.6 3 ma note: 1. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible 2. if the output switch is driven into hard saturation (non-darlingt on configuration) at low switch currents (<=300ma) and high driver currents (>=30ma), it may take up to 2us for it to come out of saturation. this condition will shorten the off time at frequencies >= 30khz, and is m agnified at high temperature. this condition does not occur with a darlington configuration, since the output switch cannot satu rate. if a non-darlington configuration is used, the following output dr ive condition is recommended: forced bata of output switch: ic output / (ic driver ? 7ma*) >= 10 * the 100ohm resistor in the emitte r of the driver divide requires about 7ma before the output switch conducts. .com .com .com .com 4 .com u datasheet
ts34063a 3-8 2005/02 rev. a circuit description .com .com .com .com 4 .com u datasheet
ts34063a 4-8 2005/02 rev. a typical application circuit figure 7. step up converter test conditions results line regulation vin= 8v~16v, io= 175ma 30mv +/- 0.05% load regulation vin= 12v, io= 75ma to 175ma 10mv +/- 0.017% output ripple vin=12v, io= 175ma 400mvpp efficiency vin=12v, io= 175ma 87.7% output ripple with optional filter vin=12v, io= 175ma 40mvpp .com .com .com .com 4 .com u datasheet
ts34063a 5-8 2005/02 rev. a typical application circuit (continues) figure 9. step down converter test conditions results line regulation vin= 15v~25v, io= 500ma 12mv +/- 0.12% load regulation vin= 25v, io= 50ma to 500ma 3mv +/- 0.03% output ripple vin= 25v, io= 500ma 120mvpp short circuit current vin= 25v, rl= 0.1ohm 1.1a efficiency vin= 25v, io= 500ma 83.7% output ripple with optional filter vin= 25v, io= 500ma 40mvpp .com .com .com .com 4 .com u datasheet
ts34063a 6-8 2005/02 rev. a typical application circuit (continues) figure 11. voltage inverting converter test conditions results line regulation vin= 4.5v~6.0v, io= 100ma 3mv +/- 0.012% load regulation vin= 5v, io= 10ma to 100ma 22mv +/- 0.09% output ripple vin= 5v, io= 100ma 500mvpp short circuit current vin= 5v, rl= 0.1ohm 900ma efficiency vin= 5v, io= 100ma 62.2% output ripple with optional filter vin= 5v, io= 100ma 70mvpp .com .com .com .com 4 .com u datasheet
ts34063a 7-8 2005/02 rev. a design formula table test step up step down voltage inverting t on t off vsat vcc vin vf vout ? ? + (min) (min) vout vsat vcc vf vout ? ? + vsat vcc vf vout ? + | | ( t on+ t off ) min 1 f min 1 f min 1 f ct 4.0 x 10 ?5 t on 4.0 x 10 ?5 t on 4.0 x 10 ?5 t on ipk(switch) 2iout(max) ? ? ? ? ? ? ? ? + 1 toff ton 2iout(max) 2iout(max) ? ? ? ? ? ? ? ? + 1 toff ton rsc ? ? ? ? ? ? ? ? ) ( 3 . 0 switch ipk ? ? ? ? ? ? ? ? ) ( 3 . 0 switch ipk ? ? ? ? ? ? ? ? ) ( 3 . 0 switch ipk l(min) ) ton( ) ipk(switch vsat ) vin( max * min ? ? ? ? ? ? ? ? ? (max) * ) ( (min) ton switch ipk vout vsat vin ? ? ? ? ? ? ? ? ? ? (max) * ) ( (min) ton switch ipk vsat vin ? ? ? ? ? ? ? ? ? co ? ? ? ? ? ? ? ? ) ( * 9 pp vripple ton iout ? ? ? ? ? ? ? ? + ) ( 8 ) )( ( pp vripple toff ton switch ipk ? ? ? ? ? ? ? ? ) ( * 9 pp vripple ton iout terms and definitions z vsat = saturation volt age of the output switch. z vf = forward voltage drop of the rectifier. the following power supply char acteristics must be chosen: z vin= normal input voltage z vout: desied output voltage, |vout| =1.25 (1+r2 / r1) z iout : desired output current. z fmin : minimum desired output switching frequency at the selected values for vin and io. z vripple(p-p): desired peak-to-peak output ripple voltage. in practice, the ca lculated capacitor value will need to be increased due to its equivalent series resistance and board la yout. the ripple voltage should be kept to a low value since it will directly affect the line and load regulation. .com .com .com .com 4 .com u datasheet
ts34063a 8-8 2005/02 rev. a sop-8 mechanical drawing c p b d k g 1 8 a 16 9 r m f sop-8 dimension millimeters inches dim min max min max a 4.80 5.00 0.189 0.196 b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.054 0.068 d 0.35 0.49 0.014 0.019 f 0.40 1.25 0.016 0.049 g 1.27 (typ) 0.05 (typ) k 0.10 0.25 0.004 0.009 m 0 o 7 o 0 o 7 o p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019 dip-8 mechanical drawing c k d g b a 1 8 4 5 l m j dip-8 dimension millimeters inches dim min max min max a 9.07 9.32 0.357 0.367 b 6.22 6.48 0.245 0.255 c 3.18 4.45 0.125 0.135 d 0.35 0.55 0.019 0.020 g 2.54 (typ) 0.10 (typ) j 0.29 0.31 0.011 0.012 k 3.25 3.35 0.128 0.132 l 7.75 8.00 0.305 0.315 m - 10 o - 10 o .com .com .com 4 .com u datasheet
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