mc33463 ON Semiconductor, mc33463 Datasheet
mc33463
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mc33463 Summary of contents
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... A wide choice of output voltages are available. These devices feature a very low quiescent bias current of 4.0 μA typical. The MC33463H−XXKT1 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 MC33463H− ...
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... MC33463H−XXKT1 Limiter Drive VFM Controller 100 kHz Oscillator L MC33463H−XXLT1 Drive EXT VFM Cb Controller 100 kHz Oscillator XX Denotes Output Voltage This device contains 100 active transistors. Figure 2. Representative Block Diagrams Rating = 25° ...
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ELECTRICAL CHARACTERISTICS Characteristic OSCILLATOR Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Maximum Oscillator Frequency Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á ...
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... AMBIENT TEMPERATURE (_C) A Figure 7. Lx Switching Current versus Temperature 60 MC33463H−50LT1 −40 −20 Figure 4. Quiescent Current versus Temperature 100 MC33463H−50KT1 −40 −20 0.9 0.8 0.7 0.6 MC33463H−50KT1 ...
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... T = 25° 100 120 0 Figure 10. Output Voltage versus Output Current 100 MC33463H−50LT1 μ 25° 100 0 Figure 12. Efficiency versus Output Current 2.0 V 1.5 1.0 0.5 = 25° Figure 14. Startup/Hold Voltage versus http://onsemi.com ...
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... Typical application circuits are shown in Figure 17 and Figure 18. Operating Description The MC33463 series converters each operate as a fixed on−time, variable off−time voltage mode ripple regulator. Operation is intended the discontinuous mode, where the inductor current ramps peak value which is greater than or equal to twice the value of the dc input current during the on− ...
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... MBRD520LT1 82 μH MC33463H−XXKT1 Gnd 1 Figure 17. MC33463H−50KT1 Typical Step−Up Application MBRD520LT1 28 μH MC33463H−XXLT1 V in 300 3 MMBT2222ALT1 EXT 0.01 μF Figure 18. MC33463H−50LT1 Typical Step−Up Application http://onsemi.com μ 100 μF Gnd 1 ...
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... MMBT2907ALT1 V in 1.0 k 100 μF 100 3 Lx Figure 19. MC33463H−33KT1 Step−Down Application Test Line Regulation V Load Regulation V in Output Ripple Efficiency Startup Circuit MMBT2222ALT1 1.5 k BZX84C3V3LT1 3 μH MBRD0520LT1 MC33463H−33KT1 2 V Limiter Lx Output Drive VFM Controller 100 kHz V ref Oscillator 1 Gnd Conditions = 5 ...
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... Lx Figure 20. Micropower Step−Down Application http://onsemi.com Startup Circuit MC33464N−30ATR MMBT2907ALT1 Out Gnd μH MBRD0520LT1 MC33463H−33KT1 2 V Limiter Lx Output 100 μF Drive VFM Controller 100 kHz V ref Oscillator 1 Gnd 3.3 V ...
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... Desired peak−to−peak output ripple voltage. For best performance the ripple voltage should be kept to a low value ripple(pp) since it will directly affect line and load regulation. Capacitor C designed for switching regulator applications − Saturation voltage of the switching transistor. sat n − Estimated circuit efficiency. Startup Circuit MC33463H−33KT1 100 3 V Limiter Lx Lx Drive VFM ...
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... Output Voltage Device MC33463H−30KT1 3.0 MC33463H−33KT1 3.3 MC33463H−50KT1 5.0 MC33463H−30LT1 3.0 MC33463H−33LT1 3.3 MC33463H−50LT1 5.0 Other voltages from 2 7 0.1 V increments are available. Consult factory for information. ORDERING INFORMATION Operating Temperature Range Type Int. Switch T = −30° to +80°C A Ext. Switch Drive http://onsemi ...
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... 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 Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative MC33463/D ...