Test Procedure for MC34063 Buck Regulator (SMD) 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. 11/11/2003 Attach 100mA load (or 33 ohm, 1W resistor) to connector P102. Attach 12 VDC source to connector P101 – observe polarity. Turn on 12VDC source. Measure DC output voltage at connector P102. DC voltage should be 3.3 V +/- 0.15 V. Remove load. Measure DC output voltage at connector P102. DC voltage should be 3.3 V +/- 0.15 V. Remove 12 VDC source and disconnect load – test complete. 1 www.onsemi.com