High power density, high efficiency, and high voltage conversion ratio (VCR) DC-DC converters are in great demand for portable devices and autonomous robots. The double-step-down (DSD) converter and its variants are promising solutions for their reduced voltage stress on the power transistors, extended duty-cycle (D), and higher equivalent switching frequency [1-4]. However, all these topologies suffer from the trade-off between efficiency and current density, since all the output current I0 flows through the power inductors, we have to either use bulky inductors for high efficiency or use small inductors for high current density. To deal with this, [5] proposed an always-dual-path (ADP) hybrid converter that can reduce the inductor current IL to 0.5I0, but at the cost of a larger inductor current ripple Delta IL' Besides, [6] proposed a hybrid switched-capacitor (SC)-parallel-inductor (CPL) buck converter that reduces IL without enlarging Delta IL, achieving high efficiency and high current density simultaneously. Nevertheless, such CPL-Buck converter only deals with a 1-cell battery input, and is not suitable for high VCR conversion, e.g., 12V-to-1V. Because its inductor current reduction effect highly depends on D, and thus its benefits drop heavily at a high VCR. In this work, we propose a hybrid resonant SC parallel inductor (ReSC-PL) buck converter that can always effectively reduce IL to below 0.5 I0sim 0.67I0 for high VCRs ranging from 10 to 20.