A Tile-Based, Adaptable Boost Converter with Fast Transient Response and Small Voltage Ripples in 40 nm CMOS Technology

Abstract

This work presents a fully integrated boost switched-capacitor regulator in 40 nm CMOS technology. In addition to using small MOS + MOM capacitors to reduce the area, the regulator utilizes a pseudo-6-bit analog-to-digital converter at the converter’s output to determine the driving capability needed. Combined with a 32-phase clock, this novel approach reduces control complexity, achieves small ripples, and shows a very fast transient response from zero to the maximum load of 6 mA, and vice versa, in 100 ps with output overshoot and undershoot not exceeding 4% of the regulator’s output voltage. A new Figure of Merit is developed to establish a basis for comparing fully integrated switched regulators’ transient response.