Test Procedure for MC34063 Buck Regulator (Leaded) Demonstration Board h 11/11/2003 Three Black Test Leads 12 VDC Power Supply Four Alligator Clips Table 1: Required Equipment Three Red Test Leads 100mA load (or 33 ohm, 1W resistor) MC34063 Buck Regulator Digital Multimeter Figure 1: Test Procedure for MC34063 1. 2. 3. 4. 5. 6. 7. 8. 9. Attach 100mA load (or 33 ohm, 1W resistor) to connector P502. Attach 12 VDC source to connector P501 – observe polarity. Turn on 12 VDC source. Measure DC output voltage at connector P502. DC voltage should be 3.3 V +/- 0.15 V. Remove load. Measure DC output voltage at connector P502. DC voltage should be 3.3 V +/- 0.15 V. Remove 12 VDC source and disconnect load – test complete.