A Current-Mode Digital AOT 4-Phase Buck Voltage Regulator

作者：Minho Choi, Chan‐Ho Kye, Jonghyun Oh, Min-Seong Choo, Deog‐Kyoon Jeong · 发表于：IEEE Solid-State Circuits Letters · 年份：2019 · DOI：10.1109/lssc.2019.2930870 · 被引用次数：9 · 研究领域：Advancements in PLL and VCO Technologies、Analog and Mixed-Signal Circuit Design、Semiconductor materials and devices

A synthesizable digital adaptive on-time (AOT) 4-phase buck voltage regulator (VR) for digital systems is presented. A current-mode digital AOT controller with the proposed ripple-injection schemes allow a fast and stable output voltage regulation, a fixed switching frequency operation, and phase synchronization for a multiphase VR. The digital AOT controller is implemented in the area of 0.0054 mm2using digital standard cells in an automated digital-design flow. The proposed VR achieves an 80-mV droop with a recovery time of 80 ns and greater than 85% power-conversion efficiency over a 50 mA to 1.2-A load current range.