A power controller that includes first and second buck controllers and a power balancer. The first buck controller is configured to receive a first power rail at a first voltage and generate a first output signal. The second buck controller is configured to receive a second power rail at a second voltage and generate a second output signal. The power balancer is configured to receive an average current for the output signals and generate, based on the average current, a reference voltage to be received by the second buck controller. The output signals are combined to create a output power rail such that the first buck controller functions as a voltage source for the output power rail and the second buck controller controls, based on the reference voltage, an amount of current in the output power rail received from each of the buck controllers.