A buck converter for providing an output voltage to a load, including a plurality of output switch arrangements having respective output inductors coupled to an output capacitor, the switch arrangements being controllable to provide phase output currents to the output capacitor; a plurality of phase output arrangements respectively coupled to the output switch arrangements, the phase output arrangements being controllable to set the respective phase output currents supplied by the output switch arrangements; a phase control bus communicatively coupled to each of the phase output arrangements; and a phase control arrangement communicatively coupled to the phase control bus, the phase control arrangement being configured to control the phase output arrangements to set the respective phase output currents so that the output voltage approximates the desired voltage; wherein the phase control arrangement and the phase output arrangements are provided as respective integrated circuits.