A switching power stage for producing an output voltage (V OUT) to a load as an amplified version of a time-varying input signal (INPUT), comprising: a modulator configured to receive the time-varying input signal (INPUT) and a feedback signal indicative of the output voltage (V OUT) and based on the input signal (INPUT) and feedback signal, generate a controller input signal to be communicated to a converter controller, wherein the controller input signal is indicative of an integrated error between the feedback signal and the input signal; a power converter comprising a power inductor (42, 62) and plurality of switches (31-39; 51-59) arranged to sequentially operate in a plurality of switch configurations in accordance with a selected operational mode of the power converter, including: a buck configuration wherein the plurality of switches (31-39; 51-59) are selectively enabled and disabled such that the power converter operates as a buck converter when in the buck configuration; and a boost configuration wherein the plurality of switches (31-39; 51-59) are selectively enabled and disabled such that the power converter operates as a boost converter when in the boost configuration; and the converter controller configured to, based on the controller input signal, sequentially select among the operational modes of the power converter and based on a selected operational mode, communicate a plurality of control signals to the power converter to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches (31-39; 51-59) in order to transfer electrical energy from a power supply of the power converter to the load in accordance with the selected operational mode, wherein the converter controller is configured to control the plurality of switches of the power converter to convert a supply voltage (V SUPPLY) of the power supply to the output voltage (V OUT) such that the output voltage (V OUT) is a function of the time varying input signal (INPUT), wherein the converter controller is configured to select the operational mode of the power converter based on a magnitude of the integrated error. a modulator configured to receive the time-varying input signal (INPUT) and a feedback signal indicative of the output voltage (V OUT) and based on the input signal (INPUT) and feedback signal, generate a controller input signal to be communicated to a converter controller, wherein the controller input signal is indicative of an integrated error between the feedback signal and the input signal; a power converter comprising a power inductor (42, 62) and plurality of switches (31-39; 51-59) arranged to sequentially operate in a plurality of switch configurations in accordance with a selected operational mode of the power converter, including: a buck configuration wherein the plurality of switches (31-39; 51-59) are selectively enabled and disabled such that the power converter operates as a buck converter when in the buck configuration; and a boost configuration wherein the plurality of switches (31-39; 51-59) are selectively enabled and disabled such that the power converter operates as a boost converter when in the boost configuration; and a buck configuration wherein the plurality of switches (31-39; 51-59) are selectively enabled and disabled such that the power converter operates as a buck converter when in the buck configuration; and a boost configuration wherein the plurality of switches (31-39; 51-59) are selectively enabled and disabled such that the power converter operates as a boost converter when in the boost configuration; and the converter controller configured to, based on the controller input signal, sequentially select among the operational modes of the power converter and based on a selected operational mode, communicate a plurality of control signals to the power converter to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches (31-39; 51-59) in order to transfer electrical energy from a power supply of the power converter to the load in accordance with the selected operational mode, wherein the converter controller is configured to control the plurality of switches of the power converter to convert a supply voltage (V SUPPLY) of the power supply to the output voltage (V OUT) such that the output voltage (V OUT) is a function of the time varying input signal (INPUT), wherein the converter controller is configured to select the operational mode of the power converter based on a magnitude of the integrated error.