HIGH EFFICIENCY REGULATOR

A power supply circuit is provided, comprising: an alternating current generator (“ACG”); a rectifier/regulator to convert one or more phase AC voltage from the ACG into a DC output voltage; a converter to decouple the DC output voltage from a load voltage provided to a battery coupled to an output of the converter; and a controller. The converter comprises: a switch having an input coupled to the DC output voltage, an output, and a control input; an inductor coupled between the switch output and the converter output; a diode coupled between the switch output and the converter output; and a capacitor coupled between the converter output and ground. The controller is configured to provide control signals to the switch control input to control a ratio of an ON state and an OFF state of the switch, thereby regulating the DC output voltage of the rectifier/regulator to the load voltage.