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In this paper, a methodology for controller design of a quadratic buck converter is given using average currentmode control. This scheme employs an inner loop that uses the average current of the first inductor and an outer loop that senses the output voltage for feedback purposes. Thus, a procedure is developed for the proper selection of: (a) the current gain for the inner loop, and (b) PI-controller for the outer loop. The design-oriented analytic results allow the designer to easily pinpoint the control circuit parameters that optimize the converter's performance. At the end, experimental results are given for a 28 W current-programmed regulator.