**7. Conclusions**

In this paper, a mathematical model of the buck DC-DC converter is established. A robust control strategy is adopted for the output control voltage of the system. The validity of the latter is demonstrated using the Matlab/Simulink environment. In a comparative study with four control algorithms, PI, IP, FLC and IMC, the simulation results show that the designed sliding mode controller has robust characteristics and a fast dynamic response in the different studied cases.

Despite all these good performances, the chattering phenomenon remains the major problem of the used sliding mode control algorithm. To avoid this issue, we intend to use high-order sliding mode control for buck DC-DC converter control in future works.

**Author Contributions:** Supervision, M.B.H.; Validation, L.S.; Writing—review and editing, S.B.H. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.

#### **References**

