A new multiphase buck converter with optimum-damping-control and current-balanced techniques

This paper presents a multiphase buck converter with optimum-damping-control and current-balanced techniques. The proposed optimum-damping-control and current-balanced techniques can achieve current balance to avoid output current flow in one phase. The phase controller is used to control multiphase buck converter. This configuration provides wide output current range from 400 mA to 4 A. It also has low output voltage and current ripple. The proposed buck converter has been fabricated in TSMC 0.35μm CMOS 2P4M technology, and the areas of the chips are 1.896 mm × 1.852 mm and 1.339 mm × 1.439 mm. The power efficiency can be up to 89.5%.