Finite time adaptive smooth nonlinear control of DC–DC buck converters operating in CCM and DCM

Recently, DC–DC converters have emerged as one of the most important topics in the industrial sector. This paper presents a new method of regulating output voltage in devices that is capable of working in continuous or discontinuous modes (CCM and DCM). It uses backstepping as well as disturbance estimators that utilize an adaptive nonlinear smooth sliding mode design. The proposed controller results in fast, non-overshooting transient responses, which are highly robust with respect to parameter uncertainties, external disturbances, and sensor noise. Furthermore, we examined the rejection of large current peaks, the ease of tuning with a frequency domain perspective and the limited sampling time in order to examine the applicability of the proposed technique. Numerical simulations based on Matlab/Simscape are presented as part of the results.