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MC33063AP Scheda tecnica(PDF) 7 Page - Texas Instruments |
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MC33063AP Scheda tecnica(HTML) 7 Page - Texas Instruments |
7 / 16 page www.ti.com 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 ) 8 7 6 1 2 8 7 6 1 2 RSC Vin RSC Vin Vout Vout a) EXTERNAL npn SWITCH b) EXTERNAL pnp SATURATED SWITCH MC33063A, MC34063A 1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS SLLS636J – DECEMBER 2004 – REVISED OCTOBER 2005 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 7 |
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