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dctodc converter control circuits d suffix plastic package case 751 (so8) p, p1 suffix plastic package case 626 pin connections semiconductor technical data 8 1 1 8 1 switch collector switch emitter timing capacitor gnd driver collector i pk sense v cc comparator inverting input (top view) device operating temperature range package ordering information mc33063ad mc33063ap1 t a = 40 to +85 c so8 plastic dip mc33063avd t a = 40 to +125 c so8 2 3 45 6 7 8 MC34063ad so8 MC34063ap1 t a = 0 to +70 c plastic dip 1 motorola analog ic device data the MC34063a series is a monolithic control circuit containing the primary functions required for dctodc converters. these devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. this series was specifically designed to be incorporated in stepdown and stepup and voltageinverting applications with a minimum number of external components. refer to application notes an920a/d and an954/d for additional design information. ? operation from 3.0 v to 40 v input ? low standby current ? current limiting ? output switch current to 1.5 a ? output voltage adjustable ? frequency operation to 100 khz ? precision 2% reference representative schematic diagram sq r q2 q1 100 i pk oscillator c t comparator + 1.25 v reference regulator 1 2 3 4 5 6 7 8 drive collector i pk sense v cc comparator inverting input switch collector switch emitter timing capacitor gnd (bottom view) this device contains 51 active transistors. ? motorola, inc. 1996 rev 5
MC34063a mc33063a 2 motorola analog ic device data maximum ratings rating symbol value unit power supply voltage v cc 40 vdc comparator input voltage range v ir 0.3 to + 40 vdc switch collector voltage v c(switch) 40 vdc switch emitter voltage (v pin 1 = 40 v) v e(switch) 40 vdc switch collector to emitter voltage v ce(switch) 40 vdc driver collector voltage v c(driver) 40 vdc driver collector current (note 1) i c(driver) 100 ma switch current i sw 1.5 a power dissipation and thermal characteristics plastic package, p, p1 suffix t a = 25 c p d 1.25 w thermal resistance r q ja 100 c/w soic package, d suffix t a = 25 c p d 625 w thermal resistance r q ja 160 c/w operating junction temperature t j +150 c operating ambient temperature range t a c MC34063a 0 to +70 mc33063av 40 to +125 mc33063a 40 to + 85 storage temperature range t stg 65 to +150 c notes: 1. maximum package power dissipation limits must be observed. 2. esd data available upon request. electrical characteristics (v cc = 5.0 v, t a = t low to t high [note 3], unless otherwise specified.) characteristics symbol min typ max unit oscillator frequency (v pin 5 = 0 v, c t = 1.0 nf, t a = 25 c) f osc 24 33 42 khz charge current (v cc = 5.0 v to 40 v, t a = 25 c) i chg 24 35 42 m a discharge current (v cc = 5.0 v to 40 v, t a = 25 c) i dischg 140 220 260 m a discharge to charge current ratio (pin 7 to v cc , t a = 25 c) i dischg /i chg 5.2 6.5 7.5 current limit sense voltage (i chg = i dischg , t a = 25 c) v ipk(sense) 250 300 350 mv output switch (note 4) saturation voltage, darlington connection (note 5) (i sw = 1.0 a, pins 1, 8 connected) v ce(sat) 1.0 1.3 v saturation voltage, darlington connection (i sw = 1.0 a, r pin 8 = 82 w to v cc , forced b 20) v ce(sat) 0.45 0.7 v dc current gain (i sw = 1.0 a, v ce = 5.0 v, t a = 25 c) h fe 50 75 collector offstate current (v ce = 40 v) i c(off) 0.01 100 m a notes: 3. t low = 0 c for MC34063a, 40 c for mc33063a, av t high = +70 c for MC34063a, + 85 c for mc33063a, +125 c for mc33063av 4. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 5. if the output switch is driven into hard saturation (nondarlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to 2.0 m s for it to come out of saturation. this condition will shorten the off time at frequencies 30 khz, and is magnified at high temperatures. this condition does not occur with a darlington configuration, since the output switch cannot saturate. if a nondarlington configuration is used, the following output drive condition is recommended: *the 100 w resistor in the emitter of the driver device requires about 7.0 ma before the output switch conducts. forced of output switch : i c output i c driver 7.0 ma * 10
MC34063a mc33063a 3 motorola analog ic device data electrical characteristics (continued) (v cc = 5.0 v, t a = t low to t high [note 3], unless otherwise specified.) characteristics unit max typ min symbol comparator threshold voltage t a = 25 c t a = t low to t high v th 1.225 1.21 1.25 1.275 1.29 v threshold voltage line regulation (v cc = 3.0 v to 40 v) mc33063a, MC34063a mc33363av reg line 1.4 1.4 5.0 6.0 mv input bias current (v in = 0 v) i ib 20 400 na total device supply current (v cc = 5.0 v to 40 v, c t = 1.0 nf, pin 7 = v cc , v pin 5 > v th , pin 2 = gnd, remaining pins open) i cc 4.0 ma notes: 3. t low = 0 c for MC34063a, 40 c for mc33063a, av t high = +70 c for MC34063a, + 85 c for mc33063a, +125 c for mc33063av 4. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 5. if the output switch is driven into hard saturation (nondarlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to 2.0 m s for it to come out of saturation. this condition will shorten the off time at frequencies 30 khz, and is magnified at high temperatures. this condition does not occur with a darlington configuration, since the output switch cannot saturate. if a nondarlington configuration is used, the following output drive condition is recommended: *the 100 w resistor in the emitter of the driver device requires about 7.0 ma before the output switch conducts. forced of output switch : i c output i c driver 7.0 ma * 10 t on v cc = 5.0 v pin 7 = v cc pin 5 = gnd t a = 25 c t off figure 1. output switch onoff time versus oscillator timing capacitor figure 2. timing capacitor waveform 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 c t , oscillator timing capacitor (nf) , output switch on-off time ( s) onoff m t 10 m s/div , oscillator voltage (v) osc 200 mv/div v v cc = 5.0 v pin 7 = v cc pin 2 = gnd pins 1, 5, 8 = open c t = 1.0 nf t a = 25 c 1000 500 200 100 50 20 10 5.0 2.0 1.0
MC34063a mc33063a 4 motorola analog ic device data figure 3. emitter follower configuration output saturation voltage versus emitter current figure 4. common emitter configuration output switch saturation voltage versus collector current figure 5. current limit sense voltage versus temperature figure 6. standby supply current versus supply voltage 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 , saturation voltage (v) ce(sat) i e , emitter current (a) v v cc = 5.0 v pins 1, 7, 8 = v cc pins 3, 5 = gnd t a = 25 c (see note 4) , saturation voltage (v) ce(sat) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 i c , collector current(a) v darlington connection forced b = 20 55 25 0 25 50 75 100 125 , current limit sense voltage (v) ipk(sense) t a , ambient temperature ( c) v v cc = 5.0 v i chg = i dischg 0 5.0 10 15 20 25 30 35 40 , supply current (ma) cc v cc , supply voltage (v) i c t = 1.0 nf pin 7 = v cc pin 2 = gnd 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 1.1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 400 380 360 340 320 300 280 260 240 220 200 3.6 3.2 2.4 2.0 1.6 1.2 0.8 0.4 0 1.0 2.8 v cc = 5.0 v pin 7 = v cc pins 2, 3, 5 = gnd t a = 25 c (see note 4) note: 4. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
MC34063a mc33063a 5 motorola analog ic device data 170 m h l 8 180 7 r sc 0.22 6 v in 12 v 100 + 5 r1 2.2 k r2 47 k sq r q2 q1 i pk osc c t v cc + comp. 1.25 v ref reg 1 2 3 4 1n5819 c t 1500 pf 330 c o + v out 28 v/175 ma v out 1.0 m h + 100 optional filter figure 7. stepup converter test conditions results line regulation v in = 8.0 v to 16 v, i o = 175 ma 30 mv = 0.05% load regulation v in = 12 v, i o = 75 ma to 175 ma 10 mv = 0.017% output ripple v in = 12 v, i o = 175 ma 400 mvpp efficiency v in = 12 v, i o = 175 ma 87.7% output ripple with optional filter v in = 12 v, i o = 175 ma 40 mvpp 8a. external npn switch 8b. external npn saturated switch (see note 5) 8 7 6 r sc v in 1 2 v out r r 0 for constant v in note: 5. if the output switch is driven into hard saturation (nondarlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to 2.0 m s to come out of saturation. this condition will shorten the off time at frequencies 30 khz, and is magnified at high temperatures. this condition does not occur with a darlington configuration, since the output switch cannot saturate. if a nondarlington configuration is used, the following output drive condition is recommended. 8 7 6 r sc v in 1 2 v out figure 8. external current boost connections for i c peak greater than 1.5 a
MC34063a mc33063a 6 motorola analog ic device data 1.25 v ref reg v out 5.0 v/500 ma 1.0 m h v out + 100 optional filter 8 7 r sc 0.33 6 v in 25 v 100 + r1 1.2 k r2 3.6 k sq r q2 q1 i pk osc c t v cc + comp. 1 2 3 4 c t 470 pf 470 c o + 5 l 1n5819 220 m h figure 9. stepdown converter test conditions results line regulation v in = 15 v to 25 v, i o = 500 ma 12 mv = 0.12% load regulation v in = 25 v, i o = 50 ma to 500 ma 3.0 mv = 0.03% output ripple v in = 25 v, i o = 500 ma 120 mvpp short circuit current v in = 25 v, r l = 0.1 w 1.1 a efficiency v in = 25 v, i o = 500 ma 83.7% output ripple with optional filter v in = 25 v, i o = 500 ma 40 mvpp 10a. external npn switch 10b. external pnp saturated switch 8 7 6 r sc v in 1 2 v out 8 7 6 r sc v in 1 2 v out figure 10. external current boost connections for i c peak greater than 1.5 a
MC34063a mc33063a 7 motorola analog ic device data 1.25 v ref reg v out 12 v/100 ma v out 1.0 m h + 100 optional filter 8 7 r sc 0.24 6 v in 4.5 v to 6.0 v 100 + 5 r2 8.2 k sq r q2 q1 i pk osc c t comp. r1 953 1 2 3 4 + 1500 pf + 1n5819 1000 m f + 88 m h v cc c o l figure 11. voltage inverting converter test conditions results line regulation v in = 4.5 v to 6.0 v, i o = 100 ma 3.0 mv = 0.012% load regulation v in = 5.0 v, i o = 10 ma to 100 ma 0.022 v = 0.09% output ripple v in = 5.0 v, i o = 100 ma 500 mvpp short circuit current v in = 5.0 v, r l = 0.1 w 910 ma efficiency v in = 5.0 v, i o = 100 ma 62.2% output ripple with optional filter v in = 5.0 v, i o = 100 ma 70 mvpp 12a. external npn switch 12b. external pnp saturated switch 8 7 6 v in 1 2 v out 8 7 6 v in 1 2 v out figure 12. external current boost connections for i c peak greater than 1.5 a
MC34063a mc33063a 8 motorola analog ic device data 5.45 2.500 (top view, copper foil as seen through the board from the component side) (top view, component side) *optional filter. figure 13. printed circuit board and component layout (circuits of figures 7, 9, 11) MC34063a MC34063a MC34063a inductor data converter inductance ( m h) turns/wire stepup 170 38 turns of #22 awg stepdown 220 48 turns of #22 awg voltageinverting 88 28 turns of #22 awg all inductors are wound on magnetics inc. 55117 toroidal core.
MC34063a mc33063a 9 motorola analog ic device data figure 14. design formula table calculation stepup stepdown voltageinverting t on /t off v out v f v in(min) v in(min) v sat v out v f v in(min) v sat v out |v out | v f v in v sat (t on + t off ) 1 f 1 f 1 f t off t on t off t on t off 1 t on t off t on t off 1 t on t off t on t off 1 t on (t on + t off ) t off (t on + t off ) t off (t on + t off ) t off c t 4.0 x 10 5 t on 4.0 x 10 5 t on 4.0 x 10 5 t on i pk(switch) 2i out(max) t on t off 1 2i out(max) 2i out(max) t on t off 1 r sc 0.3/i pk(switch) 0.3/i pk(switch) 0.3/i pk(switch) l (min) (v in(min) v sat ) i pk(switch) t on(max) (v in(min) v sat v out ) i pk(switch) t on(max) (v in(min) v sat ) i pk(switch) t on(max) c o 9 i out t on v ripple(pp) i pk(switch) (t on t off ) 8v ripple(pp) 9 i out t on v ripple(pp) v sat = saturation voltage of the output switch. v f = forward voltage drop of the output rectifier. the following power supply characteristics must be chosen: v in nominal input voltage. v out desired output voltage, i out desired output current. f min minimum desired output switching frequency at the selected values of v in and i o . v ripple(pp) desired peaktopeak output ripple voltage. in practice, the calculated capacitor value will need to be increased due to its equivalent series v ripple(pp) resistance and board layout. the ripple voltage should be kept to a low value since it will directly affect the line and load regulation. note: for further information refer to application note an920a/d and an954/d. |v out | 1.25 1 r2 r1
MC34063a mc33063a 10 motorola analog ic device data p, p1 suffix plastic package case 62605 issue k outline dimensions d suffix plastic package case 75105 (so8) issue p notes: 1. dimension l to center of lead when formed parallel. 2. package contour optional (round or square corners). 3. dimensioning and tolerancing per ansi y14.5m, 1982. min min max max millimeters inches dim 9.40 6.10 3.94 0.38 1.02 0.76 0.20 2.92 e 0.76 10.16 6.60 4.45 0.51 1.78 1.27 0.30 3.43 0.370 0.240 0.155 0.015 0.040 0.030 0.008 0.115 e 0.030 0.400 0.260 0.175 0.020 0.070 0.050 0.012 0.135 10 1.01 2.54 bsc 7.62 bsc 0.100 bsc 0.300 bsc a b c d f g h j k l m n 10 0.040 f h g d n c k m j l note 2 14 5 8 t 0.13 (0.005) ab m m m a b t seating plane notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. seating plane 14 5 8 c k 4x p a 0.25 (0.010) m tb ss 0.25 (0.010) m b m 8x d r m j x 45 f a b t dim min max min max inches millimeters 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 bsc 0.050 bsc j 0.18 0.25 0.007 0.009 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 5.80 6.20 0.229 0.244 r 0.25 0.50 0.010 0.019
MC34063a mc33063a 11 motorola analog ic device data notes
MC34063a mc33063a 12 motorola analog ic device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. atypicalo parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, 6f seibubutsuryucenter, p.o. box 20912; phoenix, arizona 85036. 18004412447 or 6023035454 3142 tatsumi kotoku, tokyo 135, japan. 038135218315 mfax : rmfax0@email.sps.mot.com touchtone 6 022446609 asia / pacific : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, internet : http://designnet.com 51 ting kok r oad, tai po, n.t., hong kong. 85226629298 MC34063a/d
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