The SP6231 Evaluation Board is designed to help the user evaluate the performance of the SP6231 for use as a dual power source for applications like a DSC with USB port power for downloading. The Evaluation Board operates from a 5V main supply which can be from the on-board USB connector, providing a regulated 3.3V output at 500mA or if that input is not present then from a 3.3V AUX switch input. The 3.3V AUX input is available from an on-board option: Sipex's SP6641B 2 Cell Battery Boost Converter to 3.3V auxiliary supply.