Buck-boost Converter TiApplication Report SLVA059A - March 1999 Revised November 2002 Understanding Buck-Boost Power Stages in Switch Mode Power Supplies Everett Rogers ABSTRACT A switching power supply consists of the power stage and the control circuit. The power stage performs the basic power conversion from the input voltage to the output voltage and includes switches and the output filter. This report addresses the buck-boost power stage only and does not cover control circuits. Detailed steady-state and small-signal analysis of the buck-boost power stage operating in continuous and discontinuous mode is presented. Variations in the standard buck-boost power stage and a discussion of power stage component requirements are included. System Power Contents 1 Introduction . . . . . . . . . . . . . . . . . . ……