A power control system includes a voltage control circuit and a plurality of balance circuits. The voltage control circuit controls a voltage level at an output of the power control system according to a reference voltage. Each of the plurality of balancing circuits outputs a current, whose magnitude is a specific ratio to an output current outputted from the voltage control circuit. The power control system is capable of balancing output currents of the voltage control circuit and the plurality of balance circuits in order to share output load of the power control system.