To provide a multiplexing power unit which stabilizes the motion of the system by lessening the ripple of output caused by the load current, the ambient temperature, the secular change, etc., in a system of equalizing the current allotment among several DC stabilizing power units.

The output current of each DC power unit is equalized by correcting the value of the output voltage to be fed back to each DC stabilizing power unit 1, 2, and 3, with a error signal being produced based on the error from the equal value of the output currents I1, I2 and I3 of DC stabilizing power units 1, 2, and 3 and the error between in load voltage and the target value. Hereby, it becomes possible to equalize the output currents of each power unit, without raising the gain of comparators COM11, COM12, and COM13 for suppressing the ripple of the output voltage and current caused by the load current, the ambient temperature, and the secular change, etc., and a multiplexing power unit stable in motion can be obtained.