A Buck Converter With 240pW Quiescent Power, 92% Peak Efficiency And A 2×106 Dynamic Range

A buck converter in 65nm CMOS is optimized for a low quiescent power of 240pW. It operates with input 1.2-3.3V and regulates the output from 0.7-0.9V. Control circuits are designed for low-leakage and static current, and scale in power over a Hz to MHz frequency range, resulting in a wide load current dynamic range of 2E6. With a 2V input, the converter has a peak efficiency of 89% and delivers 500pA to 1mA with efficiency better than 50%. The peak efficiency is 92% for a 1.2V input.