A power supply integrated circuit comprising: a plurality of power regulator modules (120, 130, 140), each power regulator module configured to control one or more characteristics of a corresponding power signal; a communication interface module configured to receive power control information over a data bus from a source external to the power supply integrated circuit, wherein the power control information comprises information related to at least one characteristic of the one or more characteristics; and a regulator control module configured to: receive the power control information from the communication interface module, determine a power regulator module of the plurality of power regulator modules (120, 130, 140) to which the received power control information relates, process the received power control information for generating one or more regulator control signals, communicate the one or more regulator control signals to the determined power regulator module (120, 130, 140) for causing the corresponding power signal of the determined power regulator module (120, 130, 140) to have the at least one characteristic, and cause the determined power regulator module (120, 130, 140) to output the corresponding power signal having the at least one characteristic. a plurality of power regulator modules (120, 130, 140), each power regulator module configured to control one or more characteristics of a corresponding power signal; a communication interface module configured to receive power control information over a data bus from a source external to the power supply integrated circuit, wherein the power control information comprises information related to at least one characteristic of the one or more characteristics; and a regulator control module configured to: receive the power control information from the communication interface module, determine a power regulator module of the plurality of power regulator modules (120, 130, 140) to which the received power control information relates, process the received power control information for generating one or more regulator control signals, communicate the one or more regulator control signals to the determined power regulator module (120, 130, 140) for causing the corresponding power signal of the determined power regulator module (120, 130, 140) to have the at least one characteristic, and cause the determined power regulator module (120, 130, 140) to output the corresponding power signal having the at least one characteristic. receive the power control information from the communication interface module, determine a power regulator module of the plurality of power regulator modules (120, 130, 140) to which the received power control information relates, process the received power control information for generating one or more regulator control signals, communicate the one or more regulator control signals to the determined power regulator module (120, 130, 140) for causing the corresponding power signal of the determined power regulator module (120, 130, 140) to have the at least one characteristic, and cause the determined power regulator module (120, 130, 140) to output the corresponding power signal having the at least one characteristic.