This paper presents a method of predicting the outerloop gain of dc–dc converters when there is a general (nonresistive)impedance as a load. Based on this prediction, it is possible to thenderive a corresponding phase margin, gain margin and bandwidthin order to define a dc–dc converter’s stable operating area. Twoapplications of the method are presented for performance prediction in:1) dc–dc converters with additional capacitors placed acrosstheir load;2) source converters in a distributed power system.In both applications, the theoretical predictions match closely tothe experimental data.Index Terms—Bandwidth, dc–dc converters, gain margin, outerloop gain, phase margin.