Comparative Performance Analysis of Regulated Hybrid Switched-Capacitor Topologies for Direct 48 V to Point-of-Load Conversion

Multiple regulated hybrid switched-capacitor (SC) topologies have been proposed in previous literature for direct 48 V to point-of-load (PoL) conversion. To compare their theoretical potential, this paper establishes an analytical framework for topological characterization and performance comparison using two metrics: a) a normalized switch stress as an indicator for efficiency and b) a normalized passive component volume as an indicator for power density. Based on the proposed analytical framework, a comparative analysis of state-of-the-art 48-V-to-1-V regulated hybrid SC converters reveals that increasing the SC stage conversion ratio can reduce both metrics and thus improve both efficiency and power density at the same time.