A multiple phase, multiple stage SMPC system includes at least one single stage phase SMPC circuit that converts an input voltage to an output voltage applied to an electronic load circuit and at least one multiple stage phase SMPC circuit. The at least one multiple stage phase SMPC circuit has at least one primary stage phase SMPC circuit generates, monitors, and controls an intermediate voltage and at least one secondary stage phase SMPC circuit converts the intermediate voltage to the output voltage. The at least one secondary stage phase has a voltage conditioner that transforms the intermediate voltage to a reference voltage that is approximately the level of the output voltage. The at least one primary stage phase SMPC circuit monitors and controls the intermediate voltage to force the at least one secondary stage phase to make its output current a correct portion of the total load current.