A Multi-Path Hybrid DC-DC Converter with Reduced Inductor Current and Wide Voltage Conversion Ratio

Abstract

This paper presents a 5V input DC-DC converter using a proposed dual-path structure. By leveraging the benefits of a multi-path architecture, the converter reduces inductor’s DC current. The topology comprises one inductor, eight power switches, and four flying capacitors, with each path including two to three power switches in series. This structure reduces the inductor’s DC current stress, enabling the use of a compact inductor without sacrificing efficiency. The proposed converter supports a voltage conversion ratio (VCR) range of 0 to 1 and is implemented in TSMC 180nm BCD process, occupying a 3.55 mm × 2.36 mm silicon area.