The DC-DC switching converter has become one of the most widely used power electronic circuits due to its high conversion efficiency and flexible output voltage. As various power electronic products become more and more complex, the demand for power supply quality becomes higher and higher. This requires the use of more advanced control methods to meet the actual needs. For the control of DC-DC buck converter, many control methods have been developed. This book investigates the sliding mode control design for the DC-DC buck converter problem.