Resonant switched-capacitor (ReSC) converters offer high power density and soft-charging benefits but inherently lack output-voltage regulation. Two-stage solutions address this limitation but require multiple inductors and a large intermediate capacitor, degrading efficiency and volumetric density. This work proposes a single-stage regulated ReSC that merges a direct-type ReSC with an inductor-first buck stage, eliminating the intermediate capacitor and one inductor while preserving the intrinsic soft-charging behavior of ReSC. Voltage regulation is achieved by introducing an additional duty-controlled current delivered through a switched-capacitor network. A 15V-to-5V, 10A prototype validates the concept, achieving 97.8% peak efficiency and demonstrating reduced inductor-current ripple under appropriate frequency ratios. The proposed architecture provides efficient alternative to conventional ReSC converters.
