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This paper describes the implementation of a second order sliding mode (SOSM) controller for a practical point-of-load (POL) power supply with realistic values of output capacitor equivalent series resistance (ESR) and equivalent series inductance (ESL). The SOSM control presented in this paper results in fast transient responses, has a current limiting feature, supports light load operation, and achieves constant frequency steady state operation. Experimental results are given for a 2.5 V -5.5 V input, 0.6 V -1.5 V output, 3 A prototype.