Transient Response Improvement of Buck Converter

Sliding mode (SM) and Proportional-integral-derivative (PID) controller are implemented for Buck converter in a continuous conduction mode. A closed-loop controller system is implemented and goes through the transient time response of buck converter. Sliding mode controller is worked as robust controller and can be used to reduce the Delay time and settling time of the system. In power drives controller are required to be of faster transient response to increase the synchronization of the system. The closed-loop system and the transients of the closed loop system are analyzed for various circuit parameters. Under a large range of operating points, the buck converter under the SM controller has a output voltage accuracy upto ± 0.02V and operating frequency of 5 MHz (approx). The merits of the SM controller are compared with some other controller.