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? semiconductor components industries, llc, 2004 april, 2004 ? rev. 15 1 publication order number: mc34063a/d mc34063a, mc33063a, ncv33063a 1.5 a, step-up/down/ inverting switching regulators the mc34063a series is a monolithic control circuit containing the primary functions required for dc?to?dc 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 step?down and step?up and voltage?inverting 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 ? pb?free packages are available figure 1. 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 gn d (bottom view) this device contains 51 active transistors. soic?8 d suffix case 751 pdip?8 p, p1 suffix case 626 1 8 1 8 see detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ordering information see general marking information in the device marking section on page 11 of this data sheet. device marking information 1 switch collector switch emitter timing capacitor gn d driver collector i pk sense v cc comparator inverting input (top view) 2 3 45 6 7 8 pin connections http://onsemi.com
mc34063a, mc33063a, ncv33063a http://onsemi.com 2 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 ja 100 c/w soic package, d suffix t a = 25 c p d 625 mw thermal resistance r ja 160 c/w operating junction temperature t j +150 c operating ambient temperature range t a c mc34063a 0 to +70 mc33063av, ncv33063a ?40 to +125 mc33063a ?40 to + 85 storage temperature range t stg ?65 to +150 c maximum ratings are those values beyond which device damage can occur. maximum ratings applied to the device are individual str ess limit values (not normal operating conditions) and are not valid simultaneously. if these limits are exceeded, device functional operation i s not implied, damage may occur and reliability may be affected. 1. maximum package power dissipation limits must be observed. 2. esd data available upon request. 3. ncv prefix is for automotive and other applications requiring site and change control.
mc34063a, mc33063a, ncv33063a http://onsemi.com 3 electrical characteristics (v cc = 5.0 v, t a = t low to t high [note 4], 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 a discharge current (v cc = 5.0 v to 40 v, t a = 25 c) i dischg 140 220 260 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 5) saturation voltage, darlington connection (i sw = 1.0 a, pins 1, 8 connected) v ce(sat) ? 1.0 1.3 v saturation voltage (note 6) (i sw = 1.0 a, r pin 8 = 82 to v cc , forced 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 off?state current (v ce = 40 v) i c(off) ? 0.01 100 a 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 = 5.0 v to 40 v) mc33063a, mc34063a mc33063av, ncv33063a 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 4. t low = 0 c for mc34063a, ? 40 c for mc33063a, av, ncv33063a t high = +70 c for mc34063a, + 85 c for mc33063a, +125 c for mc33063av, ncv33063a 5. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as poss ible. 6. if the output switch is driven into hard saturation (non?darlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to 2.0 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 s aturate. if a non?darlington configuration is used, the following output drive condition is recommended: forced of output switch : i c output i c driver 7.0 ma * 10 * the 100 resistor in the emitter of the driver device requires about 7.0 ma before the output switch conducts.
mc34063a, mc33063a, ncv33063a http://onsemi.com 4 t on v cc = 5.0 v pin 7 = v cc pin 5 = gnd t a = 25 c t off figure 2. output switch on?off time versus oscillator timing capacitor figure 3. 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) on-off m t 10 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 figure 4. emitter follower configuration output saturation voltage versus emitter current figure 5. common emitter configuration output switch saturation voltage versus collector current figure 6. current limit sense voltage versus temperature figure 7. 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 7) , 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 = 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 7) 7. low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as poss ible.
mc34063a, mc33063a, ncv33063a http://onsemi.com 5 170 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 h + 100 optional filter 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 figure 8. step?up converter
mc34063a, mc33063a, ncv33063a http://onsemi.com 6 9a. external npn switch 9b. external npn saturated switch (see note 8) 8 7 6 r sc v in 1 2 v out r r 0 for constant v in 8. if the output switch is driven into hard saturation (non?darlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to 2.0 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. i f a non?darlington configuration is used, the following output drive condition is recommended. 8 7 6 r sc v in 1 2 v out figure 9. external current boost connections for i c peak greater than 1.5 a
mc34063a, mc33063a, ncv33063a http://onsemi.com 7 1.25 v ref reg v out 5.0 v/500 ma 1.0 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 h 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 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 figure 10. step?down converter 11a. external npn switch 11b. 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 figure 11. external current boost connections for i c peak greater than 1.5 a
mc34063a, mc33063a, ncv33063a http://onsemi.com 8 1.25 v ref reg v out -12 v/100 ma v out 1.0 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 f + 88 h v cc c o l 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 = 0.1 910 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 figure 12. voltage inverting converter 13a. external npn switch 13b. external pnp saturated switch 8 7 6 v in 1 2 v out 8 7 6 v in 1 2 v out figure 13. external current boost connections for i c peak greater than 1.5 a
mc34063a, mc33063a, ncv33063a http://onsemi.com 9 5.45 2.500 (top view, copper foil as seen through the board from the component side) (top view, component side) *optional filter. figure 14. printed circuit board and component layout (circuits of figures 8, 10, 12) mc34063a mc34063a mc34063a inductor data converter inductance ( h) turns/wire step?up 170 38 turns of #22 awg step?down 220 48 turns of #22 awg voltage?inverting 88 28 turns of #22 awg all inductors are wound on magnetics inc. 55117 toroidal core.
mc34063a, mc33063a, ncv33063a http://onsemi.com 10 calculation step?up step?down voltage?inverting 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 peak?to?peak output ripple voltage. in practice, the calculated capacitor value will need to be increased due to its equivalent series 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 figure 15. design formula table
mc34063a, mc33063a, ncv33063a http://onsemi.com 11 ordering information device package shipping 2 mc33063ad soic?8 98 units / rail mc33063adg soic?8 (pb?free) 98 units / rail mc33063adr2 soic?8 2500 units / tape & reel mc33063adr2g soic?8 (pb?free) 2500 units / tape & reel mc33063ap1 dip?8 50 units / rail mc33063ap1g dip?8 (pb?free) 50 units / rail mc33063avd soic?8 98 units / rail mc33063avdg soic?8 (pb?free) 98 units / rail MC33063AVDR2 soic?8 2500 units / tape & reel ncv33063avdr2* soic?8 2500 units / tape & reel ncv33063avdr2g soic?8 (pb?free) 2500 units / tape & reel mc33063avp dip?8 50 units / rail mc34063ad soic?8 98 units / rail mc34063adg soic?8 (pb?free) 98 units / rail mc34063adr2 soic?8 2500 units / tape & reel mc34063adr2g soic?8 (pb?free) 2500 units / tape & reel mc34063ap1 dip?8 50 units / rail mc34063ap1g dip?8 (pb?free) 50 units / rail *ncv33063a: t low = ?40 c, t high = +125 c. guaranteed by design. ncv prefix is for automotive and other applications requiring site and change control. 2for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specification brochure, brd8011/d. marking diagrams pdip?8 p, p1 suffix case 626 soic?8 d suffix case 751 x = 3 or 4 a = assembly location wl, l = wafer lot yy, y = year ww, w = work week 1 8 3x063ap1 awl yyww 1 8 33063avp awl yyww alywa 3x063 1 8
mc34063a, mc33063a, ncv33063a http://onsemi.com 12 package dimensions pdip?8 p, p1 suffix plastic package case 626?05 issue l 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. 14 5 8 f note 2 ?a? ?b? ?t? seating plane h j g d k n c l m m a m 0.13 (0.005) b m t dim min max min max inches millimeters a 9.40 10.16 0.370 0.400 b 6.10 6.60 0.240 0.260 c 3.94 4.45 0.155 0.175 d 0.38 0.51 0.015 0.020 f 1.02 1.78 0.040 0.070 g 2.54 bsc 0.100 bsc h 0.76 1.27 0.030 0.050 j 0.20 0.30 0.008 0.012 k 2.92 3.43 0.115 0.135 l 7.62 bsc 0.300 bsc m --- 10 --- 10 n 0.76 1.01 0.030 0.040
mc34063a, mc33063a, ncv33063a http://onsemi.com 13 package dimensions soic?8 d suffix plastic package case 751?07 issue ab *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension 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. 6. 751?01 thru 751?06 are obsolete. new standard is 751?07. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 ?x? ?y? g m y m 0.25 (0.010) ?z? y m 0.25 (0.010) z s x s m 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1
mc34063a, mc33063a, ncv33063a http://onsemi.com 14 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc 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 scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800?282?9855 toll free usa/canada japan : on semiconductor, japan customer focus center 2?9?1 kamimeguro, meguro?ku, tokyo, japan 153?0051 phone : 81?3?5773?3850 mc34063a/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303?675?2175 or 800?344?3860 toll free usa/canada fax : 303?675?2176 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : http://onsemi.com order literature : http://www.onsemi.com/litorder for additional information, please contact your local sales representative.

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