MC34063 ON Semiconductor, MC34063 Datasheet
MC34063
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MC34063 Summary of contents
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... DC-to-DC Converter Control Circuits 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– ...
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... T stg – +150 C Symbol f osc I chg I dischg I dischg /I chg V ipk(sense) V CE(sat CE(sat) 20 C(off) T high = +70 C for MC34063A for MC33063A, +125 C for MC33063AV w 10 MOTOROLA ANALOG IC DEVICE DATA Min Typ Max Unit kHz ...
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... MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A ( 5 low to T high [Note 3], unless otherwise specified.) Symbol V th Reg line high = +70 C for MC34063A for MC33063A, +125 C for MC33063AV w 10 Figure 2. Timing Capacitor Waveform 5 off Pin Pin 2 = Gnd 2 ...
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... AMBIENT TEMPERATURE ( C) NOTE: 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 4 MC34063A MC33063A Figure 4. Common Emitter Configuration Output Switch Saturation Voltage versus 1.1 1.0 0.9 0.8 0.7 0 5.0 V Pin 0.5 Pins Gnd 0 ...
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... This condition will shorten the off time at frequencies at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate non–Darlington configuration is used, the following output drive condition is recommended. MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A Figure 7. Step–Up Converter 170 H L ...
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... Short Circuit Current Efficiency Output Ripple With Optional Filter Figure 10. External Current Boost Connections for I C Peak Greater than 1.5 A 10a. External NPN Switch MC34063A MC33063A Figure 9. Step–Down Converter 1N5819 3 L 220 ...
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... Short Circuit Current Efficiency Output Ripple With Optional Filter Figure 12. External Current Boost Connections for I C Peak Greater than 1.5 A 12a. External NPN Switch MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A Figure 11. Voltage Inverting Converter Osc ...
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... MC34063A Converter Step–Up Step–Down Voltage–Inverting All inductors are wound on Magnetics Inc. 55117 toroidal core. 8 MC34063A MC33063A (Circuits of Figures 7, 9, 11) 5.45 MC34063A (Top View, Component Side) INDUCTOR DATA Inductance ( H) Turns/Wire ...
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... 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. MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A Figure 14. Design Formula Table Step–Down ...
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... P 4X –B– SEATING –T– PLANE 0.25 (0.010 MC34063A MC33063A OUTLINE DIMENSIONS P, P1 SUFFIX PLASTIC PACKAGE CASE 626–05 ISSUE K –B– SUFFIX PLASTIC PACKAGE CASE 751–05 (SO– ...
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... MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A NOTES 11 ...
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... MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609 INTERNET: http://Design–NET.com 12 MC34063A MC33063A are registered trademarks of Motorola, Inc. Motorola, Inc Equal JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd. ...