Patent ID: 7446434

Claim:
A power management system comprising: a primary power source; a secondary power source generated from the primary power source; and a power output selector coupled to the primary power source and the secondary power source, the power output selector operating to select: (a) the primary power source as a power supply at a desired regulated power output, during initialization of the power management system and at any other time during operation of the power management system that a magnitude of the primary power source exceeds a magnitude of the secondary power source, (b) the primary power source as the power supply at the desired regulated power output, at any time after initialization of the power management system that the magnitude of the primary power source exceeds the magnitude of a desired regulated power output, and (c) the secondary power source as the power supply at the desired regulated power output, at any time after initialization of the power management system that the magnitude of the secondary power source exceeds the magnitude of the primary power source and the magnitude of the primary power source is less than the desired regulated power output.