A 10-MHz 14.3W/mm2 DAB Hysteretic Control Power Converter Achieving 2.5W/247ns Full Load Power Flipping and above 80% Efficiency in 99.9% Power Range for 5G IoTs

Abstract

A double adaptive bound (DAB) hysteretic control power converter is designed for 5G IoTs, which require nanosecond power load flipping and high efficiency across full power range. In response to 1A/3ns load step-up/step-down, it achieves 1% $\mathrm{t}_{settle}$ of 247ns/387ns, thanks to the DAB control. This is 6× faster than the best of the arts on $0.18 \mu \mathrm{m}$ CMOS. A synchronized DCR offset cancellation scheme improves $V_{O}$ regulation accuracy by 10×. As power scales from full to ultra-light load, the controller self-reconfigures to remove redundant controller loss and facilitate adaptive system power delivery. It achieves $\gt80$% efficiency over 99.9% of 2.5W full power range. Highly efficient design leads to the highest reported chip power density of 14.3W/mm2.