Integrated Power Management Solutions Using Switched Capacitor DC-DC Converters

Abstract

The power management unit appropriate for dynamic voltage scaling (DVS) and energy harvesting shall have the capability to operate across a wide input/output voltage levels and achieve high efficiency in the operating range, while providing voltage regulation. This work presents a reconfigurable switched capacitor (SC) DC-DC converter which targets DVS and energy harvesting applications. The proposed converter employs a 4-capacitor interleaving topology. It has 11 conversion ratios 6 stepdown (1/4, 1/3, 1/2, 2/3, 3/4, 1/1) and 5 step-up (4/3, 3/2, 2/1, 3/1, 4/1), making it efficient over wide input/output voltage range. Line and load regulations are provided with the aid of a nearly digital controller to illuminate the static power dissipation.