MC33466H-30JT1 ONSEMI [ON Semiconductor], MC33466H-30JT1 Datasheet
MC33466H-30JT1
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MC33466H-30JT1 Summary of contents
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... A wide choice of output voltages are available. These devices feature a very low quiescent bias current typical. The MC33466H–XXJT1 series features a highly accurate voltage reference, an oscillator, a pulse width modulation (PWM) controller, a driver transistor (Lx), an error amplifier and feedback resistive divider. ...
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... Representative Block Diagrams MC33466H–XXJT1 Limiter Output (Voltage Drive Feedback) PWM Controller Phase Comp 50 kHz Oscillator V ref Soft–Start 1 Gnd MC33466H–XXLT1 D 2 Output 3 (Voltage Drive Feedback) EXT PWM Controller Phase Comp 100 kHz Oscillator V ref Soft–Start 1 Gnd XX Denotes Output Voltage This device contains 100 active transistors ...
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ELECTRICAL CHARACTERISTICS ( 2 and unless otherwise noted.) Characteristic OSCILLATOR Frequency LX output EXT output Oscillator Minimum Startup Voltage ( mA) Oscillator Minimum Supply ...
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... MC33466H–50JT1 L = 120 3 –40 – AMBIENT TEMPERATURE ( C) Figure Voltage Limit versus Temperature 1.0 0.9 0.8 0.7 0.6 MC33466H–50JT1 2.0 V 0.5 – – AMBIENT TEMPERATURE ( C) MOTOROLA ANALOG IC DEVICE DATA versus Temperature 0 20 ...
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... 1.5 V 200 300 400 500 600 OUTPUT CURRENT (mA 1 2.0 V MC33466H–30LT1 Figure 18 200 300 400 500 600 OUTPUT CURRENT (mA) Output Current MC33466H–50LT1 Figure 18 40 ...
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... AMBIENT TEMPERATURE ( C) Figure 16. Load Transient Response MC33466H–50JT1 5 120 1 3.0 V 5.2 Figure 17 5.0 4.8 4.6 5.0 6 MOTOROLA ANALOG IC DEVICE DATA V start V hold MC33466H–50JT1 L = 120 3.0 mA Figure 250 200 150 100 TIME (ms) ...
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... 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 MC33466H–XXJT1 provides output drive for an external transistor. Applications The following converter applications show the simplicity and flexibility of the converter architecture ...
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... Figure 19. MC33466H–33JT1 Step–Down Application MMBT2907ALT1 V in 1.0 k 330 F 100 3 Lx Test Line Regulation Load Regulation Output Ripple Efficiency 8 MC33466 Startup Circuit MMBT2222ALT1 1.5 k BZX84C3V3LT1 3 MBRD0520LT1 MC33466H–33JT1 V Lx Limiter Drive PWM Controller Phase Comp 50 kHz V ref Soft–Start Oscillator 1 Gnd Condition ...
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... NOTE: Using the MC33464N–30ATR reduces current drawn in the startup circuit during normal operation. MOTOROLA ANALOG IC DEVICE DATA MC33466 Startup Circuit MC33464N–30ATR MMBT2222ALT1 Out Gnd MBRD0520LT1 MC33466H–33JT1 Limiter Lx Drive PWM Controller Phase Comp 50 kHz V ref Soft–Start Oscillator V O 3.3 V 300 mA ...
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... MMBT2907ALT1 V in 1.0 k 100 F 100 MC33466 Figure 21. Flyback Application Startup Circuit 1.5 k MMBT2222ALT1 3.3 V MC33466H–33KT1 V Lx Limiter Drive PWM Controller Phase Comp 50 kHz V ref Soft–Start Oscillator 1 Gnd MOTOROLA ANALOG IC DEVICE DATA Output 100 F ...
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Calculation Step–Down L(avg L(pk ripple(pp) The following converter design characteristics must be chosen – Nominal Operating dc input voltage V O – Desired dc ...
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0. 0.10 e1 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 ...