View MC33463-D_2957963.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

? semiconductor components industries, llc, 2001 november, 2001 rev. 2 1 publication order number: mc33463/d mc33463 variable frequency micropower dc-to-dc converter 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 figure 1. typical circuit configurations for the mc33463h v in 3 v o lx gnd mc33463hxxkt1 1 v o 2 v in 3 v o ext gnd mc33463hxxlt1 1 v o 2 sot89 h suffix case 1213 http://onsemi.com marking diagram xx = voltage option (30, 33, 50) y = 1 = kt1, 2= lt1 zz = lot code b = lot 1 tab xxy pin connections (tab is connected to pin 2) 1 2 3 (top view) ground output lx tab mc33463hxxkt1 (tab is connected to pin 2) 1 2 3 (top view) ground output ext tab mc33463hxxlt1 see detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ordering information zzb
mc33463 http://onsemi.com 2 figure 2. representative block diagrams this device contains 100 active transistors. mc33463hxxkt1 mc33463hxxlt1 xx denotes output voltage lx d v in v lx limiter 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 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 http://onsemi.com 3 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 maximum oscillator frequency f osc 80 100 120 khz oscillator minimum supply voltage (i o = 1.0 ma) v cc v kt1 suffix 0.7 oscillator startup voltage (i o = 1.0 ma) v cc v kt1 suffix 0.8 0.9 oscillator startup voltage (i o = 0 ma) v cc v lt1 suffix 0.7 0.8 maximum oscillator duty cycle d max 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 (i o = 0 ma) i q m a 30kt1 suffix (v in = 1.8 v) 4.0 8.0 33kt1 suffix 4.3 8.6 50kt1 suffix (v in = 3.0 v) 6.0 12 quiescent bias current (v in = v o + 0.5 v, i o = 0 ma) 30kt1 suffix 2.0 5.0 33kt1 suffix 2.0 5.0 50kt1 suffix 2.0 5.0 quiescent bias current (i o = 0 ma) i q m a 30lt1 suffix (v in = 1.8 v) 30 50 33lt1 suffix 34.5 56 50lt1 suffix (v in = 3.0 v) 60 90 quiescent bias current (v in = v o + 0.5 v, i o = 0 ma) 30lt1 suffix 2.0 5.0 33lt1 suffix 2.0 5.0 50lt1 suffix 2.0 5.0 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 http://onsemi.com 4 v lxlim , lx voltage limit (v) t a , ambient temperature ( c) 40 20 0 20 40 60 80 0.5 0.6 0.7 0.8 0.9 d, duty ratio (%) t a , ambient temperature ( c) 40 20 0 20 40 60 80 60 70 80 90 100 i q , quiescent bias current ( m a) t a , ambient temperature ( c) 40 figure 3. quiescent current versus temperature figure 4. quiescent current versus temperature mc33463h50kt1 v in = 5.5 v i o = 0 ma figure 5. oscillator frequency versus temperature figure 6. oscillator duty ratio versus temperature figure 7. lx switching current versus temperature figure 8. v lx voltage limit versus temperature mc33463h50kt1 v in = 3.0 v i o = 10 ma mc33463h50kt1 v in = 3.0 v i o = 10 ma 20 020406080 0 0.4 0.8 1.2 1.8 1.6 1.4 1.0 0.6 0.2 mc33463h50lt1 v in = 3.0 v i o = 0 ma i q , quiescent bias current ( m a) t a , ambient temperature ( c) 40 20 0 20 40 60 80 0 20 40 60 50 30 10 f osc , oscillator frequency (khz) t a , ambient temperature ( c) 40 20 0 20 40 60 80 40 80 120 160 180 mc33463h50kt1 v in = 3.0 v i o = 10 ma i lx , lx switching current (ma) t a , ambient temperature ( c) 40 20 0 20 40 60 80 40 80 120 160 200 mc33463h50kt1 v in = 3.0 v i o = 10 ma
mc33463 http://onsemi.com 5 i o , output current (ma) v start /v hold , voltage limit (v) 0 20 40 60 80 120 0 0.5 2.0 1.5 1.0 100 i o , output current (ma) efficiency (%) 0 200 400 600 0 20 60 100 80 40 i o , output current (ma) figure 9. output voltage versus output current figure 10. output voltage versus output current figure 11. efficiency versus output current figure 12. efficiency versus output current figure 13. startup/hold voltage versus output current figure 14. startup/hold voltage versus output current mc33463h50kt1 l = 120 m h t a = 25 c mc33463h50kt1 l = 82 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 o , output voltage (v) 0 20 40 60 80 100 120 1.0 2.0 4.0 6.0 5.0 3.0 mc33463h50lt1 l = 28 m h t a = 25 c v in = 3.0 v i o , output current (ma) v o , output voltage (v) 400 600 0 1 3 6 5 2 200 0 4 v in = 2.0 v v in = 0.9 v v in = 4.0 v i o , output current (ma) efficiency (%) 0 20 40 60 80 100 0 20 60 100 80 40 mc33463h50kt1 l = 120 m h t a = 25 c v in = 3.0 v v in = 1.5 v v in = 4.0 v v in = 2.0 v v in = 1.5 v v in = 0.9 v mc33463h50lt1 l = 28 m h t a = 25 c v in = 0.9 v v in = 1.5 v v in = 2.0 v v in = 3.0 v v in = 4.0 v i o , output current (ma) v start /v hold , startup/hold voltage (v) 0 2.0 4.0 6.0 8.0 12 0 0.4 1.6 1.2 0.8 10 v start v hold v start v hold mc33463h50kt1 l = 28 m h t a = 25 c
mc33463 http://onsemi.com 6 v start/ v hold , startup/hold voltage (v) t a , ambient temperature ( c) figure 15. output voltage versus temperature figure 16. startup/hold voltage versus temperature mc33463h50kt1 l = 120 m h v o , output voltage (v) 40 20 0 20 40 60 80 4.8 6.1 5.0 4.9 t a , ambient temperature ( c) 20 0 20 40 60 80 0.2 1.0 0.6 0.4 mc33463h50kt1 l = 120 m h i o = 1.0 ma 40 0.8 v start v hold 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 17 and figure 18. 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 19, or a micropower undervoltage sensor, as shown in figure 20. oscillator the maximum 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 17 through 21.
mc33463 http://onsemi.com 7 figure 17. mc33463h50kt1 typical stepup application mbrd520lt1 v in 3 v o lx gnd mc33463hxxkt1 22 m f 82 m h 1 v o 2 figure 18. 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 http://onsemi.com 8 figure 19. 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 http://onsemi.com 9 figure 20. 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 mc33464n-30atr startup circuit in out gnd 10 k 10 k 3 2 1 output 47 m h 3 lx 100 m f
mc33463 http://onsemi.com 10 figure 21. 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 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. 1. v sat saturation voltage of the switching transistor. n estimated circuit efficiency. figure 22. design equations
mc33463 http://onsemi.com 11 ordering information device output voltage type operating temperature range package shipping mc33463h30kt1 3.0 it mc33463h33kt1 3.3 int. switch mc33463h50kt1 5.0 switch t =30 to +80 c sot 89 1000 ta p e & reel mc33463h30lt1 3.0 ext. t a = 30 to +80 c sot89 1000 tape & reel mc33463h33lt1 3.3 ext . switch di 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.
mc33463 http://onsemi.com 12 package dimensions sot89 h suffix case 121302 issue c k l g h m 0.10 t s b s a m 0.10 t s b s a d e 2 pl c j a b f t seating plane notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeters 3. 1213-01 obsolete, new standard 1213-02. dim a min max min max inches 4.40 4.60 0.173 0.181 millimeters b 2.40 2.60 0.094 0.102 c 1.40 1.60 0.055 0.063 d 0.37 0.57 0.015 0.022 e 0.32 0.52 0.013 0.020 f 1.50 1.83 0.059 0.072 g 1.50 bsc 0.059 bsc h 3.00 bsc 0.118 bsc j 0.30 0.50 0.012 0.020 k 0.80 --- 0.031 --- l --- 4.25 --- 0.167 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any 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 without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c 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. 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, 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 unauthori zed 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. publication ordering information japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. mc33463/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com n. american technical support : 8002829855 toll free usa/canada

▲Up To Search▲

Price & Availability of MC33463-D

	To Download MC33463-D Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .