Test Procedure for MC34063 Buck-Boost Regulator Demonstration Board h 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-Boost Regulator Digital Multimeter Figure 1: Test Procedure for MC34063 1. Attach 100 mA load (or 33 ohm, 1W resistor) to connector P702. 2. Attach 3.0 VDC source to connector P701 – observe polarity. 3. Turn on 3.0 VDC source. 4. Measure DC output voltage at connector P702. 5. DC voltage should be 3.3 V +/- 0.15 V. 6. Remove load. 7. Measure DC output voltage at connector P702. 8. DC voltage should be 3.3 V +/- 0.15 V. 9. Reattach 100 mA load. 10. Adjust DC source to 6.0 VDC. 11. Measure DC output voltage at connector P702. 12. DC voltage should be 3.3 V +/- 0.15V. 13. Remove load. 14. Measure DC output voltage at connector P702. 15. DC voltage should be 3.3 V +/- 0.15V. 16. Remove DC source and disconnect load – test complete. 05/20/2011 1 www.onsemi.com