High Step-Down DC-DC Converter for Point of Load Applications
Abstract
A high step-down, non-isolated, DC-DC converter composed of a switched-inductor is proposed in this paper. The switched-inductor utilizes a flying and switched-capacitor network to step-down the input voltage. The current-stress at the output capacitor has been reduced by the output inductor providing additional step-down. Equivalent circuits of the proposed converter are used to explain the operation in ideal conditions. The converter is further analyzed to investigate the impact of equivalent-series-resistances of switched-capacitors on the overall voltage gain. Moreover, expressions for voltage-current stresses of switching elements and design equations for passive devices have been derived at the steady-state analysis. Finally, the operation of the proposed converter is validated using simulations.