This paper presents the analysis of the quadratic boost converter operating in sliding-mode control in order to obtain high DC-gain. This approach uses a indirect control of the output voltage based on the use of a sliding surface defined with the input inductor current. The control law is argued through a stability test. The proposed control was implemented in MATLAB simulations with a quadratic boost operating in continuous conduction mode (CCM), and another one in discontinuous conduction mode (DCM). The results validate the theoretical approach and illustrate the advantages and drawbacks of two operational modes.Universidad de Ibagu?