Abstract: An active switch for electrically connecting and disconnecting a power source such as a solar array to a charge storage device is disclosed. The active switch allows a minimal amount of reverse back current flow from the charge storage device to the power source having a low on-resistance.

Abstract: A micro-solar insolation circuit having a boost regulator or DC—DC converter used to transfer the power available from a solar cell source, at a value close to its optimum, to a load is provided. The micro-solar insolation circuit comprises a comparator for generating an error signal based on a solar cell reference voltage wherein a modulator controller receives the error signal and changes its duty cycle based on the error signal. The modulator controller controls a high-speed switch in association with a synchronous rectifier for loss-less current limiting.