Patent ID: 7259480

Claim:
A method for converting battery power for a battery-optimized system-on-a-chip, the method comprises: sensing for presence of an alternate power source by comparing a supply voltage to a voltage on a node operably coupled to the alternate power source, when the voltage on the node compares favorably to the supply voltage, detecting the presence of the alternate power source; when the presence of the alternate power source is detected: disabling a first control loop of a first DC-to-DC converter, by logically disabling a sink transistor of the first DC-to-DC converter, and logically disabling a load transistor of the first DC-to-DC converter, wherein, when enabled, the first DC-to-DC converter converts battery voltage from a battery into the supply voltage; and enabling a second control loop of a second DC-to-DC converter, wherein the second DC-to-DC converter converts voltage from the alternate power source into the supply voltage.