Schematic for MC33063 (DFN) step down demoboard 8 1 S Q R 100R 2 Oscillator 7 RSC1 3 Ct Ipk Ct1 Comparator 6 1.25V Vin C14 D11 0.22 1.25V Reference Regulator 4 L11 220 uH 470 pF C11 Optional Filter 5 100 nF 100 uF R12 3.6k R11 L12 MC33063 1.2k C15 Vout 5V/800mA C12 100 nF 470 uF 1 uH C13 Vout 5V/800mA 100 uF