Design of Switching Power Regulators

DC/DC switching regulators (SWRs) are widely used in power management units because of their high efficiency, adjustable output voltage, and high driving capability. The chapter discusses the output voltages of SWRs can be controlled by a duty cycle. It describes how to obtain the signal of the duty cycle and how SWRs generate well-regulated voltages at different load conditions. The chapter presents the power stage of the buck converter can be controlled using several control methods to achieve regulation performance. System stability is considered through modeling and small signal analysis of the power stage, controller, and whole system. Using the ESR zero can certainly simplify the compensation technique at the cost of regulation performance. The design of the compensation network for the voltage-mode buck converter is complex because of its complex poles at the power stage.