A power supply circuit comprising: at least one input terminal (102-1, 102-3, 102-5) to receive at least one input voltage (V in, 1, V in, 2, V in, 3); a power element comprising a plurality of power element components (114-1, 114-2, 114-3) and configured to convert at least one of the at least one input voltage to at least one output voltage (V out, 1, V out, 2, V out, 3); a plurality of regulator controllers (106-1, 106-2, 106-3) configured to control the power element components for the conversion of the at least one input voltage to the at least one output voltage, wherein an output of each of the regulator controllers is coupled to a respective different one of the power element components; a first set of switches coupled to the regulator controllers and the power element components, wherein each switch (116-1, 116-2, 116-3) of the first set of switches selectively connects the outputs of two different regulator controllers together and thereby connects the two corresponding power element components together, wherein the first set of switches are configured to: selectively mutually connect two or more of the power element components to operate co-operatively as one voltage regulator; or selectively disconnect two or more of the power elements components to operate as two or more independent voltage regulators; a plurality of output terminals (108-1, 108-2, 108-3) to output the at least one output voltage; and a set of devices, configured to selectively connect the two or more power element components to the output terminals, and useable with the first set of switches to configure the two or more of the power element components of the power supply circuit to function as either one voltage regulator or two or more independent voltage regulators. at least one input terminal (102-1, 102-3, 102-5) to receive at least one input voltage (V in, 1, V in, 2, V in, 3); a power element comprising a plurality of power element components (114-1, 114-2, 114-3) and configured to convert at least one of the at least one input voltage to at least one output voltage (V out, 1, V out, 2, V out, 3); a plurality of regulator controllers (106-1, 106-2, 106-3) configured to control the power element components for the conversion of the at least one input voltage to the at least one output voltage, wherein an output of each of the regulator controllers is coupled to a respective different one of the power element components; a first set of switches coupled to the regulator controllers and the power element components, wherein each switch (116-1, 116-2, 116-3) of the first set of switches selectively connects the outputs of two different regulator controllers together and thereby connects the two corresponding power element components together, wherein the first set of switches are configured to: selectively mutually connect two or more of the power element components to operate co-operatively as one voltage regulator; or selectively disconnect two or more of the power elements components to operate as two or more independent voltage regulators; selectively mutually connect two or more of the power element components to operate co-operatively as one voltage regulator; or selectively disconnect two or more of the power elements components to operate as two or more independent voltage regulators; a plurality of output terminals (108-1, 108-2, 108-3) to output the at least one output voltage; and a set of devices, configured to selectively connect the two or more power element components to the output terminals, and useable with the first set of switches to configure the two or more of the power element components of the power supply circuit to function as either one voltage regulator or two or more independent voltage regulators.