Implementation of Adaptive Pulse Skipping Modulation based Quadratic Buck Converter for Light Load Applications

This work presents the implementation of an adaptive pulse skipping modulation-based quadratic buck converter operating over a wide load range. The quadratic buck converter is known for its steep step-down operation, making it a popular choice for high-performance power applications. However, achieving high efficiency over a wide load range can be challenging; performance degrades at light loads due to significant switching losses $P_{\text{Switch}}$. The theoretical analysis of the adaptive pulse skipping modulation (PSM) scheme is presented, and simulation is performed in the MATLAB Simulink environment for a regulated output voltage and output current. The simulation results demonstrate that flat efficiency in the range of 86%–89% over a wide range of load currents is observed. The stability is examined using a state-space model.