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MC33063ADRG4 Folha de dados(PDF) 8 Page - Texas Instruments |
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MC33063ADRG4 Folha de dados(HTML) 8 Page - Texas Instruments |
8 / 20 page Q S R CT Ipk Q2 Q1 2 1 CT Oscillator _ + 1.25-V Reference Regulator 4 5 3 8 7 6 RSC 0.33 Ω 3.8 k Ω R2 L 220 µH CO 1N5819 470 µF 470 pF R1 1.2 k Ω 100 µF + + VCC VOUT 5 V/500 mA 1.0 µH 100 µF + Optional Filter VIN 25 V Comparator V OUT + 1.25 (1 ) R2 R1 ) VIN 8 7 6 1 2 8 7 6 1 2 RSC VIN RSC VOUT VOUT a) EXTERNAL npn SWITCH b) EXTERNAL pnp SATURATED SWITCH MC33063A MC34063A SLLS636L – DECEMBER 2004 – REVISED DECEMBER 2009 www.ti.com Figure 8. Step-Down Converter TEST CONDITIONS RESULTS Line regulation VIN = 15 V to 25 V, IO = 500 mA 12 mV ± 0.12% Load regulation VIN = 25 V, IO = 50 mA to 500 mA 3 mV ± 0.03% Output ripple VIN = 25 V, IO = 500 mA 120 mVPP Short-circuit current VIN = 25 V, RL = 0.1 Ω 1.1 A Efficiency VIN = 25 V, IO = 500 mA 83.7% Output ripple with optional filter VIN = 25 V, IO = 500 mA 40 mVPP Figure 9. External Current-Boost Connections for IC Peak Greater Than 1.5 A 8 Submit Documentation Feedback Copyright © 2004–2009, Texas Instruments Incorporated Product Folder Link(s): MC33063A MC34063A |
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