A 200 nA Quiescent Current N-FinFET Power Stage Buck Converter with Passive Ramp On-Off-Time Control in 12 nm FinFET
Journal
2023 International VLSI Symposium on Technology, Systems and Applications, VLSI-TSA/VLSI-DAT 2023 - Proceedings
ISBN
9798350334166
Date Issued
2023-01-01
Author(s)
Abstract
This paper presents a 200 nA quiescent current, 4.8 MHz Fsw, all N-FINFET power stage buck converter with passive ramp (PSR) on-off-time control for a modern mobile silicon-on-chip (SoC). During DCM, only the main comparator is alive to maximize the light-load efficiency. An N-FinFET power stage with co-package designed debounce circuitry and bootstrap circuit performs a 35 mOhm Rdson with all trace resistance. As a result, the efficiency > 90% range is from 1 μ A to 2 A. The proposed passive ramp constant-on-off time controller achieves a 23 mV/17 mV undershoot/overshoot voltage with 800 ns settling time with a 1 μ A to 500 mA loading step.
Subjects
buck converter | FinFET | low Iq | N-FinFET power stage | on-off-time control | passive ramp
SDGs
Type
conference paper