JSSC 2021第9期Power Management0.6-µm

A Scalable Multiphase Current-Mode Buck Controller With Sub-Milliohm DCR Current

提出一种可扩展的多相峰值电流模式降压控制器，具有亚毫欧级DCR电流检测和同步过流保护功能。

0.6-µm BiCMOS工艺

多相降压控制器峰值电流模式DCR电流检测同步过流保护BiCMOS工艺

▸亚毫欧级DCR电流检测电路

▸时间共享放大器与高频信号结合重建电流检测信号

▸同步打嗝模式过流保护方案

Abstract

This article presents a scalable multiphase peak current-mode Buck controller with sub-milliohm direct current resistance (DCR) current sensing and synchronized overcurrent protection. Low DCR current sensing capability is critical in pursuing high efﬁciency and precise current balancing. For this purpose, a sub-milliohm DCR current sensing circuit is proposed. The low-frequency current signals from all the phases are ampliﬁed by a time-shared ampliﬁer, and the outputs are combined with the exag