A mobile terminal including a multi-phase DC-DC converter for controlling a supply voltage provided to a power amplifier in the transmit chain. In general, the multi-phase DC-DC converter includes a multi-phase converter control system and a multi-phase power train. The multi-phase converter control system generates a plurality of control signals based on a set-point voltage and a supply voltage at the output of the multi-phase DC-DC converter. The plurality of control signals are provided to the multi-phase control system which generates a plurality of currents each based on a corresponding one of the plurality of control signals. The plurality of currents charge an output capacitor such that an average voltage across the output capacitor is the desired supply voltage.