An integrated circuit comprising: a first input; a second input; an output; a first power converter (54, 82) having: a voltage input coupled to the first input of the integrated circuit, a control input, and an output coupled to the output of the integrated circuit; a second power converter (56, 84) having: a voltage input coupled to the second input of the integrated circuit, the voltage input of the second power converter (56, 84) being free of connection to the voltage input of the first power converter (54, 82), a control input, and an output coupled to the output of the first power converter (54, 82) and to the output of the integrated circuit; a first power converter control circuit having: a first input coupled to a reference voltage lead, a second input coupled to the output of the first power converter (54, 82), and an output coupled to the control input of the first power converter (54, 82); a second power converter control circuit having: a first input, a second input, and an output coupled to the control input of the second power converter (56, 84); a first current sensing circuit having: an input coupled to the output of the first power converter (54, 82), and an output coupled to the first input of the second power converter control circuit; and a second current sensing circuit having: an input coupled to the output of the second power converter (56, 84), and an output coupled to the second input of the second power converter control circuit, the second power converter control circuit being free of connection with the reference voltage lead; wherein the first power converter (54, 82) and the first power converter control circuit are configured to regulate a voltage produced at the output of the first power converter (54, 82) such that a magnitude of the voltage is proportional to a magnitude of a reference voltage, and wherein the second power converter (56, 84) and the second power converter control circuit are configured to regulate a current produced at the output of the second power converter (56, 84) to a single power rail such that a magnitude of the current is proportional or substantially equal to a magnitude of a current produced at the output of the first power converter (54, 82 to the single power rail a first input; a second input; an output; a first power converter (54, 82) having: a voltage input coupled to the first input of the integrated circuit, a control input, and an output coupled to the output of the integrated circuit; a second power converter (56, 84) having: a voltage input coupled to the second input of the integrated circuit, the voltage input of the second power converter (56, 84) being free of connection to the voltage input of the first power converter (54, 82), a control input, and an output coupled to the output of the first power converter (54, 82) and to the output of the integrated circuit; a first power converter control circuit having: a first input coupled to a reference voltage lead, a second input coupled to the output of the first power converter (54, 82), and an output coupled to the control input of the first power converter (54, 82); a second power converter control circuit having: a first input, a second input, and an output coupled to the control input of the second power converter (56, 84); a first current sensing circuit having: an input coupled to the output of the first power converter (54, 82), and an output coupled to the first input of the second power converter control circuit; and a second current sensing circuit having: an input coupled to the output of the second power converter (56, 84), and an output coupled to the second input of the second power converter control circuit, the second power converter control circuit being free of connection with the reference voltage lead; wherein the first power converter (54, 82) and the first power converter control circuit are configured to regulate a voltage produced at the output of the first power converter (54, 82) such that a magnitude of the voltage is proportional to a magnitude of a reference voltage, and wherein the second power converter (56, 84) and the second power converter control circuit are configured to regulate a current produced at the output of the second power converter (56, 84) to a single power rail such that a magnitude of the current is proportional or substantially equal to a magnitude of a current produced at the output of the first power converter (54, 82 to the single power rail