A 1.8V-Input 0.2-to-1.5V-Output 2.5A 930mA/mm3 Always-Balanced Dual-Path Hybrid Buck Converter with Seamlessly All-VCR-Coverable Tri-Mode Operation

This paper presents an always-balanced dual-path hybrid buck converter capable of covering all conversion ratios with high efficiency. The proposed tri-mode operations ensure seamless, defect-free dy-namic voltage scaling (DVS). Fabricated in 180nm, the chip outputs voltages ranging from 0.2 to l.5V with a 1.8V input. It achieves a peak efficiency of 94.2%, even with compact-volume LC parts. Its current density was measured to be $930\text{mA}/\text{mm}^{3}$ at 2.5A load current.