mc33466 ON Semiconductor, mc33466 Datasheet
mc33466
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mc33466 Summary of contents
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... MC33466 Fixed Frequency PWM Micropower DC−to−DC Converter The MC33466 series are micropower 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 15 μ ...
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... MC33466H−XXJT1 Limiter Lx Lx Drive PWM Controller Phase Comp 50 kHz Oscillator V ref Soft−Start 1 Gnd MC33466H−XXLT1 Drive EXT Cb PWM Controller Phase Comp 100 kHz Oscillator V ref Soft−Start 1 XX Denotes Output Voltage This device contains 100 active transistors. ...
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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 Frequency JT1 Suffix Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á ...
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... TYPICAL APPLICATIONS 5 MC33466H−50JT1 5 − AMBIENT TEMPERATURE (°C) A Figure 3. Quiescent Current versus Temperature 100 MC33466H−50JT1 L = 120 μ 3 − AMBIENT TEMPERATURE (°C) A Figure 5. Maximum Duty Ratio 1.0 0.9 0.8 0.7 MC33466H− ...
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... 200 300 400 500 I , OUTPUT CURRENT ( MC33466H−30LT1 μ 0 25° 200 400 I , OUTPUT CURRENT ( 1.5 V MC33466H−50LT1 μ 25°C ...
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... MC33466H−30LT1 μ 25°C A Figure 23 200 300 400 500 I , OUTPUT CURRENT (mA) O MC33466H−50LT1 μ 25°C A hold Figure 100 I , OUTPUT CURRENT (mA) O Output Current V start V hold MC33466H−50JT1 L = 120 μ 3.0 mA ...
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... MC33466H−50JT1 L = 120 μH 200 I O Figure 22 150 100 1.0 2.0 3.0 4 INPUT VOLTAGE (V) in Figure 20. Supply Current versus Input Voltage TYPICAL APPLICATIONS MC33466H−50JT1 5 120 μ 1 3 5.2 Figure 22 5.0 4.8 4.6 5.0 6 Figure 21. Load Transient Response http://onsemi.com 7 250 ...
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... Typical application circuits are shown in Figures 22 through 26. Operating Description The MC33466 series converters operate as a fixed frequency voltage mode 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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... MMBT2907ALT1 V in 1.0 k 330 μF 100 3 Lx Figure 24. MC33466H−33JT1 Step−Down Application Test Line Regulation V Load Regulation V in Output Ripple Efficiency Startup Circuit MMBT2222ALT1 1.5 k BZX84C3V3LT1 3 μH MBRD0520LT1 MC33466H−33JT1 V Limiter Lx Drive PWM Controller Phase Comp 50 kHz V ref Soft−Start Oscillator ...
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... NOTE: Using the MC33464N−30ATR reduces current drawn in the startup circuit during normal operation. Figure 25. Micropower Step−Down Application Startup Circuit MC33464N−30ATR MMBT2222ALT1 Out Gnd μH MBRD0520LT1 MC33466H−33JT1 V Limiter Lx Drive PWM Controller Phase Comp 50 kHz V ref Soft−Start Oscillator 1 Gnd http://onsemi ...
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... MMBT2907ALT1 V in 1.0 k 100 μF 100 3 Lx Figure 26. Flyback Application Startup Circuit 1.5 k MMBT2222ALT1 3.3 V MC33466H−33JT1 V Limiter Lx Drive PWM Controller Phase Comp 50 kHz V ref Soft−Start Oscillator 1 Gnd http://onsemi.com 3 Output 100 μF ...
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Calculation Step−Down – L(avg L(pk) V ripple(pp) The following converter design characteristics must be chosen: V − Nominal Operating dc input voltage in V − Desired ...
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... Output Voltage Device MC33466H−30JT1 3.0 MC33466H−33JT1 3.3 MC33466H−50JT1 5.0 MC33466H−30LT1 3.0 MC33466H−33LT1 3.3 MC33466H−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 MC33466/D ...