A current-sensorless PWM-based robust sliding mode controller is proposed for the DC-DC Boost Converter,
a nonminimum phase system that presents major challenges in the design of stabilizing controllers. The development of the controller requires the measurement of the output voltage and the estimation of its derivative. An extended state observer is used to estimate a lumped uncertainty that comprises the uncertain load and input voltage and also to estimate the derivative of the output voltage. A linear sliding surface is used to derive the
controller that is simple in its design and yet exhibits excellent features in term of external disturbance suppression and despite the absence of the inductor current feedback. Its robustness is validated by computer simulations using a converter example from a recent study. Future work will be the validation of these results experimentally.