cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 1/9 LM34063AQ8 cystek product specification dc-to-dc converter control circuit LM34063AQ8 description the LM34063AQ8 is a monolithic control circuit containing the primary functions required for dc-to-dc converters. this device consists of an internal temperature compensated reference, comparator, control- led dut y cycle oscillator with an active current limit circuit, driver and high current output switch. features ? 3v to 40v input voltage operation ? low quiescent current at 1.6ma ? internal 1.6a peak current switch ? frequency operation from 100hz~100khz ? internal 1.8% reference ? current limiting applications ? saver for cellular phone ? dc-dc converter module ordering information device package shipping LM34063AQ8 sop-8 (pb-free lead plating package) 2500 pcs / tape & reel, 3000 pcs/tape & reel typical application circuit 1 8 2 3 4 5 6 7 fig1.saver circuit for cellular phone v in v out c out 220 f d1 1n5819 c t 470pf rsc c1 100 f ra 5.6k rb 33k 200 h l1 lm34063a
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 2/9 LM34063AQ8 cystek product specification pin connections pin1:switch collector pin5:co mparator inverting input pin2:switch emitter pin6:vcc pin3:timing capacitor pin7:ipk sense 1234 5678 pin4:gnd pin8:driver collector absolute maximum rating supply voltage ................................................................................................................ ....................... 40 v comparator input vo ltage range ........................................................................................... -0.3 v ~ 40 v switch collector voltage ...................................................................................................... ................. 40 v switch emitter voltage ........................................................................................................ .................. 40 v switch collector to emitter voltage ........................................................................................... ........... 40 v driver collector voltage ...................................................................................................... .................. 40 v switch current ................................................................................................................ ....................... 1.6a power dissipation @ ta=25 c......................................................................................................... 625 mw thermal resistance junction to air............................................................................................. 160 c / w operating junction temperature......................................................................................................... 125 c operating ambient temperature range......................................................................................... 0 ~ 70 c storage temperature range.................................................................................................. -40 c ~ 125 c electrical characteristics (vcc=5v,ta=25 c, unless otherwise specified) parameter test condition symbol min. typ. max. unit oscillator frequency vpin 5=0v, c t =1nf f osc 30 38 45 khz charging current 5.0v v cc 40v i chg 30 38 45 a discharge current 5.0v v cc 40v i dischg 180 240 290 a voltage amplitude pin3 v osc - 0.6 - v discharge to charge current ratio v ipk(sense) =v cc i dischg /i chg 5.2 6.5 7.5 - current limit sense voltage i chg =i dischg v ipk(sence) 250 300 350 mv output switch saturation voltage, darlington connection i sw =1.0a, v c(driver)= vc(switch) v ce(sat) - 1.0 1.3 v saturation voltage i sw =1.0a, i c(driver) =50ma (forced 20) v ce(sat) - 0.45 0.8 v dc current gain i sw =1.0a, v ce =5.0v hfe 50 75 - - collector off-state current v ce =40v i cc(off) - 0.01 100 a comparator threshold voltage 0 c ta 70 c v th 1.225 1.210 1.250 - 1.275 1.290 v threshold voltage line regulation 3.0v v cc 40v regline - 1.4 5 mv input bias current v in =0v i ib - -20 -400 na supply current v ipk(sence) =v cc v pin5 > v fb , 5.0v v cc 40v c t =1nf, pin2=gnd remaining pins open i cc - 1.6 4 ma
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 3/9 LM34063AQ8 cystek product specification block diagram application information design formula table calculation step-down step-up voltage-inverting t on / t off v out +v f / v in(min) -v sat -v out vout+v f -v in(min) / v in(min) -v sat |v out | + v f / v in -v sat (t on + t off ) max 1/f min 1/f min 1/f min c t 4*10 -5 t on 4*10 -5 t on 4*10 -5 t on i c(switch) 2*i out(max) 2*i out(max) (t on +t off /t off ) 2*i out(max) (t on +t off /t off ) rs 0.3 / i c(switch) 0.3 / i c(switch) 0.3 / i c(switch) l (min) (v in(min)- v sat -v out / i c(switch) ) *t on(max) (v in(min)- v sat / i c(switch) ) *t on(max) (v in(min)- v sat / i c(switch) ) *t on(max) sc pin1:1.6a switch collector tc pin3:oscilletor timin g ca p acitor gnd pin4:power gnd dri pin8:driver collector ipk pin7:highside current sense input, vcc-vipk=300mv vcc pin6:power supply input fb pin5:feedback comparator inverting input se pin2:darlington switch emitter comparator 1.25v reference voltage + - ct ipk oscillator q2 80 q s r q1 i c(switch) *(t on +t off) / i out *t on / v ripple(p-p) i out *t on / v ripple(p-p) c o 8v ripple(p-p) v sat : saturation voltage of the output switch. v f : forward voltage drop of the ringback rectifier. the following power supply characteristics must be chosen : v in : nominal input voltage. v out : desired output voltage. |v out |=1.25*(1+rb/ra) i out - desired output current fmin : minimum desired output switching frequency at the selected values for v in and i out . v ripple(p-p) : desired peak to peak output ripple voltage in prac tice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board layout. the ripple voltage should be kept to a low value since it will directly effect the line and lo ad regulation.
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 4/9 LM34063AQ8 cystek product specification application information (continued) 1 8 2 3 4 5 6 7 v out 28v / 200ma r1 150 c out 220 f c t 680 f v in ra 2.2k rsc 0.22 c1 100 f lm34063a l1 d1 200 h 1n5819 rb 47 k line regulation : 100mv (v in =8v~16v, @i o =200ma) load regulation : 5mv (vin=12v, @io=80ma~200ma) fig.2 step-up converter 1 8 2 3 4 5 6 7 lm34063a rsc c1 ra r1 rb c t d1 l1 q 1 r2 v in v out c out fig.3 step-up converter with external npn switch 1 8 2 3 4 5 6 7 fig.4 step-down converter line regulation : 40mv (v in =10v~20v, @i o =500ma) load regulation : 5mv (vin=15v, @io=10ma~500ma) short circuit current : 1.3a lm34063a v out 5v / 500ma rsc 0.25 l1 rb ra 1.2 200 h ( vin=15v, @ rl=0.1 ) k 3.6k c t 470 f d1 1n5819 c out 470 f c1 100 f v in
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 5/9 LM34063AQ8 cystek product specification application information (continued) v in 1 8 2 3 4 5 6 7 fig.5 step-down converter with external pnp saturation switch v out lm34063a r2 r1 q 1 l1 d1 rsc c1 ra rb c out c t 1 8 2 3 4 5 6 7 fig.6 voltage inverting converter v out -12v / 100ma c out 470 f l1 100 h d1 1n5819 c t 680 f lm34063a rsc 0.25 c1 100 f rb 8.2 k ra 953 v in 4.5v-6v line regulation : 20mv (v in =4.5v~6v, @i o =100ma) load regulation : 100mv (vin=5v, @io=10ma~100ma) 1 8 2 3 4 5 6 7 fig.7 voltage inverting converter with external pnp saturation switch v out c out d1 l1 r1 r2 lm34063a c t rsc ra rb c1 v in q 1
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 6/9 LM34063AQ8 cystek product specification characteristic curves output switch on-off time vs oscillator timing capacitance 1 10 100 1000 0.01 0.1 1 10 oscillator timing capacitance---ct(nf) output switch on-off time---ton-off(u s ton toff v cc =5.0v pin 7=v cc pin 5=gnd t a =25 emitter follower configuration output saturation voltage vs emitter current 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 emitter current---ie(a) saturation voltage---vce(sat)(v ) v cc =5v pins 1,7,8=v cc pins 3,5=gnd t a =25 (see note ) common emitter configuration output switch saturation voltage vs collector current 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 collector current---ic(a) saturation voltage---vce(sat)(v) darlington connection forced =20 vcc=5v pin 7=vcc pins 2,3,5=gnd ta=25 (see note) current limit sense voltage vs temperature 200 220 240 260 280 300 320 340 360 380 400 -75 -50 -25 0 25 50 75 100 125 ambient temperature---ta() current limit sense voltage---vipk(v ) v cc =5.0v ichg=idischg standby supply current vs supply voltage 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 0 5 10 15 20 25 30 35 40 supply voltage ---vcc(v) supply current---i cc (ma) c t =10nf pin 7=v cc pin 2=gnd note: low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 7/9 LM34063AQ8 cystek product specification reel dimension carrier tape dimension
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 8/9 LM34063AQ8 cystek product specification recommended wave soldering condition product peak temperature soldering time pb-free devices 260 +0/-5 c 5 +1/-1 seconds recommended temperature profile for ir reflow profile feature sn-pb eutectic assembly pb-free assembly average ramp-up rate (tsmax to tp) 3 c/second max. 3 c/second max. 100 c 150 c 60-120 seconds preheat 150 c ? temperature min(t s min) ? temperature max(t s max) ? time(ts min to ts max ) 200 c 60-180 seconds time maintained above: ? temperature (t l ) ? time (t l ) 183 c 217 c 60-150 seconds 60-150 seconds peak temperature(t p ) 240 +0/-5 c 260 +0/-5 c time within 5 c of actual peak temperature(tp) 10-30 seconds 20-40 seconds ramp down rate 6 c/second max. 6 c/second max. time 25 c to peak temperature 6 minutes max. 8 minutes max. note : all temperatures refer to topside of t he package, measured on the package body surface.
cystech electronics corp. spec. no. : c501q8 issued date : 2003.03.21 revised date :2011.09.06 page no. : 9/9 LM34063AQ8 cystek product specification so-8 dimension *: typical inches millimeters inches millimeters dim min. max. min. max. 8-lead so-8 plastic package cystek packa g e code: q8 marking: top view a b front view f c d e g part a i h j k o m l n right side view part a 34063a date code dim min. max. min. max. a 0.1909 0.2007 4.85 5.10 i 0.0019 0.0078 0.05 0.20 b 0.1515 0.1555 3.85 3.95 j 0.0118 0.0275 0.30 0.70 c 0.2283 0.2441 5.80 6.20 k 0.0074 0.0098 0.19 0.25 d 0.0480 0.0519 1.22 1.32 l 0.0145 0.0204 0.37 0.52 e 0.0145 0.0185 0.37 0.47 m 0.0118 0.0197 0.30 0.50 f 0.1472 0.1527 3.74 3.88 n 0.0031 0.0051 0.08 0.13 g 0.0570 0.0649 1.45 1.65 o 0.0000 0.0059 0.00 0.15 h 0.1889 0.2007 4.80 5.10 notes: 1.controlling dimension: millimeters. 2.maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.if there is any question with packing specification or packing method, please c ontact your local cystek sales office. material: ? lead: pure tin plated. ? mold compound: epoxy resin family, flammability solid burning class: ul94v-0. important notice: ? all rights are reserved. reproduction in whole or in part is prohibited without the prior written approval of cystek. ? cystek reserves the right to make changes to its products without notice. ? cystek semiconductor products are not warranted to be suitable for use in life-support applications, or systems. ? cystek assumes no liability for any consequence of customer pr oduct design, infringement of pat ents, or application assistance .
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