“High efficiency of DC/DC converters is important in many portable applications to extend the available energy cycle of energy sources. Other applications benefit from energy savings. This work offers modeling and simulation techniques to analyze and design for an overall efficiency optimization of standard synchronous and asynchronous buck/boost converter topologies including variable switching frequency loads. Loss equations are developed, modeled, and simulated along with common power electronic components utilizing Matlab/Simulink SimPower toolbox. Optimization curves are developed for various cases and analyzed to aid in design.”