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MC33063AQDRJR Folha de dados(PDF) 6 Page - Texas Instruments |
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MC33063AQDRJR Folha de dados(HTML) 6 Page - Texas Instruments |
6 / 14 page MC33063AQ1 1.5A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATOR SLLS654A – APRIL 2005 – REVISED JANUARY 2007 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS 8 7 6 1 2 R* *R " 0 for constant VIN 8 7 6 1 2 VOUT RSC VIN RSC VIN VOUT 2a. External npn Switch 2b. External pnp Saturated Switch (see Note 5) NOTE 5: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( ≤300 mA) and high driver currents ( ≥30 mA), it may take up to 2 µs to come out of saturation. This condition will shorten the off time at frequencies ≥30 kHz and is magnified at high temperatures. This condition does not occur with a Darlington configuration because the output switch cannot saturate. If a non-Darlington configuration is used, the output drive configuration in Figure 2b is recommended. Figure 7. External Current-Boost Connections for IC Peak Greater Than 1.5 A |
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