In this paper, the problem of finite-time tracking is investigated for switched buck power converters based on the pulse width\nmodulation (PWM) technique. For the continuous model, an equivalent continuous controller is solved by the backstepping\ntechnique, such that all signals are finite-time stable. PWM-based finite-time tracking with the equivalent control input is\nproposed for the switched buck converter, such that the tracking error converges to an arbitrarily small neighborhood of the origin\nin finite time, and the origin of the closed-loop system is practically finite-time stable. Simulation results are given to demonstrate\nthe effectiveness of the proposed schemes.
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