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semiconductor technical data variable frequency micropower dctodc converter h suffix plastic package case 1213 (sot89) pin connections order this document by mc33463/d tab 1 (tab is connected to pin 2) 1 2 3 (top view) ground output lx ta b mc33463hxxkt1 (tab is connected to pin 2) 1 2 3 (top view) ground output ext ta b mc33463hxxlt1 1 motorola analog ic device data
the mc33463 series are micropower stepup switching voltage regulators, specifically designed for handheld and laptop applications, to provide regulated output voltages using a minimum of external parts. a wide choice of output voltages are available. these devices feature a very low quiescent bias current of 4.0 m a typical. the mc33463hxxkt1 series features a highly accurate voltage reference, an oscillator, a variable frequency modulation (vfm) controller, a driver transistor (lx), a comparator and feedback resistive divider. the mc33463hxxlt1 is identical to the mc33463hxxkt1, except that a drive pin (ext) for an external transistor is provided. due to the low bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of useful battery life is desirable. mc33463 series features: ? low quiescent bias current of 4.0 m a ? high output voltage accuracy of 2.5% ? low startup voltage of 0.9 v at 1.0 ma ? wide output voltage range of 2.5 v to 7.5 v available ? high efficiency of 80% typical ? surface mount package ordering information device output voltage type operating temperature range package (tape/reel) mc33463h30kt1 3.0 int. sith t30 80 c sot89 (t ) mc33463h33kt1 3.3 switch t30 80 c (tape) mc33463h50kt1 5.0 t a = 30 to +80 c mc33463h30lt1 3.0 ext. sith t a = 30 t o + 80 c sot89 (t ) mc33463h33lt1 3.3 switch di (tape) mc33463h50lt1 5.0 drive other voltages from 2.5 v to 7.5 v, in 0.1 v increments are available. consult factory for information. ? motorola, inc. 1999 rev 1
mc33463 2 motorola analog ic device data representative block diagrams this device contains 100 active transistors. mc33463hxxkt1 mc33463hxxlt1 xx denotes output voltage lx d v in v lx limitier 3 v ref gnd vfm controller 100 khz oscillator 2 output v o c o drive vfm controller 100 khz oscillator v ref d v in output v o c o gnd 1 3 ext l q rb cb 1 2 drive l c in c in maximum ratings (t c = 25 c, unless otherwise noted.) rating symbol value unit power supply voltage (transient) v cc 12 v power supply voltage (operating) v cc 8.0 v external pin voltage v ext 0.3 to v o v lx pin voltage v lx 12 v ext pin source/sink current i ext 50/50 ma lx pin sink current i lx 250 ma power dissipation and thermal characteristics h suffix, plastic package case 1213 (sot89) maximum power dissipation @ t a = 25 c p d 500 mw thermal resistance, junctiontoair r q ja 200 c/w operating junction temperature t j 125 c operating ambient temperature t a 30 to +80 c storage temperature range t stg 40 to +125 c
mc33463 3 motorola analog ic device data electrical characteristics (v cc = 2.0 v, i o = 10 ma and t a = 25 c, unless otherwise noted.) characteristic symbol min typ max unit oscillator frequency f osc 80 100 120 khz oscillator minimum supply voltage (i o = 0 ma) v cc 0.7 0.8 v oscillator duty ratio each cycle d 65 75 85 % lx output (kt1 suffix) on state sink current (v lx = 0.4 v) i lx ma 30kt1 suffix 60 33kt1 suffix 63 50kt1 suffix 80 v lx voltage limit (note 1) v lxlim 0.65 0.8 1.0 v off state leakage current (v lx = 6.0 v) i lkg 0.5 m a ext output (lt1 suffix) on state source current (v ext = v o 0.4 v) i source ma 30lt1 suffix 1.5 33lt1 suffix 1.575 50lt1 suffix 2.0 off state sink current (v ext = 0.4 v) i sink ma 30lt1 suffix 1.5 33lt1 suffix 1.575 50lt1 suffix 2.0 total device output voltage v o v 30kt1 or 30lt1 suffix 2.925 3.0 3.075 33kt1 or 33lt1 suffix 3.218 3.3 3.383 50kt1 or 50lt1 suffix 4.875 5.0 5.125 quiescent bias current (v in = 2.0 v, i o = 0 ma) i q m a 30kt1 suffix 4.0 8.0 33kt1 suffix 4.3 8.6 50kt1 suffix 6.0 12 quiescent bias current (v in = v o + 0.5 v, i o = 0 ma) 30kt1 suffix 1.2 5.0 33kt1 suffix 1.2 5.0 50kt1 suffix 2.0 5.0 quiescent bias current (v in = 2.0 v, i o = 0 ma) i q m a 30lt1 suffix 30 50 33lt1 suffix 34.5 56 50lt1 suffix 60 90 quiescent bias current (v in = v o + 0.5 v, i o = 0 ma) 30lt1 suffix 1.2 5.0 33lt1 suffix 1.2 5.0 50lt1 suffix 2.0 5.0 note: 1. when the lx switch is turned on, i lx carried through the r ds(on) of the lx switch results in v lx . when v lx reaches v lxlim , the lx switch is turned off by the lx switch protection circuit.
mc33463 4 motorola analog ic device data i q , quiescent bias current ( a) m 40 0.9 40 100 40 2.0 40 200 40 200 40 50 , lx voltage limit (v) t a , ambient temperature ( c) d, duty ratio (%) t a , ambient temperature ( c) t a , ambient temperature ( c) i lx , lx switching current (ma) t a , ambient temperature ( c) f osc , oscillator frequency (khz) t a , ambient temperature ( c) i q , quiescent bias current ( a) m figure 1. quiescent current versus temperature t a , ambient temperature ( c) figure 2. quiescent current versus temperature mc33463h30lt1 v in = 2.0 v i o = 0 ma figure 3. oscillator frequency versus temperature figure 4. oscillator duty ratio versus temperature figure 5. lx switching current versus temperature figure 6. v lx voltage limit versus temperature mc33463h30kt1 v in = 3.5 v i o = 0 ma mc33463h50kt1 v in = 2.0 v i o = 10 ma mc33463h50kt1 v in = 2.0 v i o = 10 ma 0.8 90 1.6 160 160 40 0.7 80 1.2 120 120 30 0.6 70 0.8 80 80 20 0.5 60 0.4 40 40 10 20 0 20 40 60 80 20 0 20 40 60 80 20 20 20 20 0 0 0 0 20 20 20 20 40 40 40 40 60 60 60 60 80 80 80 80 mc33463h50kt1 v in = 2.0 v i o = 10 ma mc33463h50kt1 v in = 2.0 v i o = 10 ma v lxlim
mc33463 5 motorola analog ic device data 0 2.0 0 100 0 6.0 0 1.6 0 100 0 6.0 i o , output current (ma) i o , output current (ma) i o , output current (ma) i o , output current (ma) efficiency (%) i o , output current (ma) figure 7. output voltage versus output current i o , output current (ma) figure 8. output voltage versus output current figure 9. efficiency versus output current figure 10. efficiency versus output current figure 11. startup/hold voltage versus output current figure 12. startup/hold voltage versus output current v o , output voltage (v) v o , output voltage (v) efficiency (%) mc33463h50kt1 l = 120 m h t a = 25 c /v hold , startup/hold voltage limit (v) v start mc33463h50lt1 l = 28 m h t a = 25 c mc33463h33kt1 l = 82 m h t a = 25 c figure 15 mc33463h33lt1 l = 28 m h t a = 25 c figure 16 mc33463h50kt1 l = 82 m h t a = 25 c mc33463h50lt1 l = 28 m h t a = 25 c v in = 4.0 v v in = 3.0 v v in = 2.0 v v in = 0.9 v v in = 1.5 v v in = 3.0 v v in = 2.0 v v in = 0.9 v v in = 1.5 v v in = 3.0 v v in = 2.0 v v in = 0.9 v v in = 3.0 v v in = 2.0 v v in = 0.9 v v start v start v hold v hold 1.5 80 5.0 1.2 80 5.0 1.0 60 4.0 0.8 60 4.0 0.5 40 3.0 0.4 40 3.0 0 20 2.0 20 2.0 0 1.0 0 0 1.0 20 100 2.0 20 20 40 100 200 4.0 40 40 60 200 300 6.0 60 60 80 300 400 8.0 80 80 100 400 500 10 100 100 500 120 600 600 12 120 120 /v hold , voltage limit (v) v start
mc33463 6 motorola analog ic device data /v hold , startup/hold voltage (v) v start 40 1.0 40 5.1 t a , ambient temperature ( c) figure 13. output voltage versus temperature t a , ambient temperature ( c) figure 14. startup/hold voltage versus temperature v o , output voltage (v) mc33463h50kt1 l = 120 m h mc33463h50kt1 l = 120 m h i o = 1.0 ma v start v hold 0.8 5.0 0.6 4.9 0.4 4.8 0.2 20 20 0 0 20 20 40 60 80 60 40 80 definitions quiescent bias current current which is used to operate the switching regulator chip and is not delivered to the load. leakage current current drawn through a transistor junction, under a specified collector voltage, when the transistor is off. functional description introduction the mc33463 series are monolithic power switching regulators optimized for dctodc converter applications where power drain must be minimized. the combination of features in this series allows the system designer to directly implement stepup, stepdown or flyback converters with a small number of external components. potential applications include low power consumer products and battery powered portable products. typical application circuits are shown in figure 15 and figure 16. operating description the mc33463 series converters each operate as a fixed ontime, variable offtime voltage mode ripple regulator. operation is intended to be in the discontinuous mode, where the inductor current ramps up to a peak value which is greater than or equal to twice the value of the dc input current during the ontime of the transistor switch. during the offtime of the transistor switch, the inductor current ramps down to zero and remains at zero until another switching cycle begins. because the output voltage pin is also used as the supply voltage for powering internal circuitry, an external startup circuit is needed in stepdown and flyback converter designs to provide initial power to the integrated circuit to begin switching. the startup circuit needed can be three discrete components, as shown in figure 17, or a micropower undervoltage sensor, as shown in figure 18. oscillator the oscillator frequency, is internally programmed to 100 khz. the duty ratio of the oscillator is designed for a constant value of 0.75 nominal. hence the nominal ontime of the power switch is: t on d f osc 0.75 (100 khz) 7.5 m s feedback comparator the output voltage is sensed and fed to a high speed comparator noninverting input through an internal resistive divider. the comparator inverting input is connected to an internally trimmed to 0.7 v reference. with a voltage mode ripple converter operating under normal conditions, output switch conduction is initiated and terminated by the oscillator, offtime is controlled by the high speed voltage feedback comparator. driver and output switch to aid in system design flexibility and conversion efficiency, two output driver options are provided. the mc33463hxxkt1 converters have an internal drive transistor which is capable of sinking currents greater than 60 ma into the lx pin. an internal v lx limiter circuit senses if the lx pin voltage exceeds 1.0 v during t on and turns off the drive transistor. the mc33463hxxlt1 provides output drive for an external transistor. applications the following converter applications show the simplicity and flexibility of the converter architecture. three main converter topologies are demonstrated in figures 15 through 19.
mc33463 7 motorola analog ic device data figure 15. mc33463h50kt1 typical stepup application mbrd520lt1 v in 3 v o lx gnd mc33463hxxkt1 22 m f 82 m h 1 v o 2 figure 16. mc33463h50lt1 typical stepup application mbrd520lt1 v in 3 mmbt2222alt1 300 v o ext gnd mc33463hxxlt1 28 m h 0.01 m f 1 v o 2 100 m f
mc33463 8 motorola analog ic device data figure 17. mc33463h33kt1 stepdown application drive 100 100 m f v lx limiter 3 v ref gnd vfm controller 100 khz oscillator 2 v o 3.3 v 1.0 k v in mbrd0520lt1 47 m h 1.5 k 3.3 v 100 m f mc33463h33kt1 mmbt2907alt1 1 mmbt2222alt1 bzx84c3v3lt1 startup circuit lx output test conditions results line regulation v in = 5.0 v to 8.0 v, i o = 100 ma 18.5 mv = 0.3% load regulation v in = 5.0 v, i o = 1.0 ma to 100 ma 5.7 mv = 0.1% output ripple v in = 5.0 v, i o = 100 ma 40 mvpp efficiency v in = 5.0 v, i o = 100 ma 60.3%
mc33463 9 motorola analog ic device data figure 18. micropower stepdown application drive 100 100 m f v lx limiter v ref gnd vfm controller 100 khz oscillator 2 v o 3.3 v 1.0 k v in mbrd0520lt1 1 mc33463h33kt1 mmbt2907alt1 mmbt2907alt1 mc33464n30atr startup circuit in out gnd 10 k 10 k 3 2 1 output 47 m h 3 lx 100 m f
mc33463 10 motorola analog ic device data figure 19. flyback application drive 100 100 m f v lx limiter 3 v ref gnd vfm controller 100 khz oscillator 2 v o 1.0 k v in 1.5 k 3.3 v mc33463h33kt1 mmbt2907alt1 mmbt2222alt1 startup circuit lx 1 output 100 m f
mc33463 11 motorola analog ic device data figure 20. design equations calculation stepdown stepup flyback t on d f osc d f osc d f osc l t on (v in v sat v o ) (2i o ) (n)(v in ) 2 (t on ) p o (n)(v in ) 2 (t on ) p o i l(avg) i o i in i in i l(pk) (v in v sat v o )(t on ) l (v in v sat )(t on ) l (v in v sat )(t on ) l v ripple(pp) i l
1 16f osc c o 2 ( esr ) 2 1 2 (t on )(i o ) (c o ) (t on )(i o ) (c o ) the following converter design characteristics must be chosen: v in nominal operating dc input voltage v o desired dc output voltage i o desired dc output current v ripple(pp) desired peaktopeak output ripple voltage. for best performance the ripple voltage should be kept to a low value since it will directly affect line and load regulation. capacitor c o should be a low equivalent series resistance (esr) electrolytic designed for switching regulator applications. note : 1. v sat saturation voltage of the switching transistor. n estimated circuit efficiency.
mc33463 12 motorola analog ic device data h suffix plastic package case 121301 (sot89) issue o outline dimensions dim min max millimeters a2 1.40 1.60 b 0.37 0.57 b1 0.32 0.52 c 0.30 0.50 d 4.40 4.60 d1 1.50 1.70 e 4.25 e1 2.40 2.60 e 1.50 bsc e1 3.00 bsc l1 0.80 notes: 1. dimensions are in millimeters. 2. interpret dimensions and tolerancing per asme y14.5m, 1994. 3. datum c is a seating plane. a d e1 b l1 e d1 e e1 c m 0.10 c s b s a m 0.10 c s b s a b b1 2x a2 c 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. mfax is a trademark of motorola, inc. how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : motorola japan ltd.; spd, strategic planning office, 141, p.o. box 5405, denver, colorado 80217. 13036752140 or 18004412447 4321 nishigotanda, shinagawaku, tokyo, japan. 81354878488 customer focus center: 18005216274 mfax ? : rmfax0@email.sps.mot.com touchtone 1 6022446609 asia / pacific : motorola semiconductors h.k. ltd.; silicon harbour centre, motorola fax back system us & canada only 18007741848 2, dai king street, tai po industrial estate, tai po, n.t., hong kong. http://sps.motorola.com/mfax/ 85226629298 home page : http://motorola.com/sps/ mc33463/d ?

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