A 1.23W/mm2 83.7%-Efficiency 400MHz 6-Phase Fully Integrated Buck Converter in 28nm CMOS with On-Chip Capacitor Dynamic Re-Allocation for Inter-Inductor Current Balancing and Fast DVS of 75mV/ns

📋 论文概要

本文提出了一种在28nm CMOS工艺下实现的400MHz 6相全集成降压转换器，通过动态电容技术解决了多相集成电压调节器中的相间电流不平衡问题，实现了1.23W/mm²的功率密度和83.7%的峰值效率。

💡 主要创新点

• 提出了一种片上电容动态技术，用于补偿多相集成电感之间的失配和寄生电阻差异，从而消除相间电流不平衡。
• 实现了400MHz的高开关频率和6相架构，在保持高效率的同时显著提升了功率密度。

🏷 关键词

📄 原文摘要

processors, a high-frequency and multi-phase (MP) integrated voltage regulator (IVR) using multiple inductors would be an ideal solution to deliver optimized power with rapid dynamic voltage scaling (DVS) [1-5]. Nevertheless, in practical use, MP-IVRs suffer from an inter-inductor current imbalance because of mismatches in integrated inductances, different parasitic resistances, and duty-control skews among all phases (top of Fig. 18.1.1). Such a current mismatch may cause larger output ripple and efficiency degradation, losing the benefits of multi-phase operation. Also, thermal hotspots can occur due to excessive current density and deteriorate reliability. Previous approaches [2,4] use current sensors to calibrate the duty cycle of each phase, but the design complexity and power overhead tend to be greatly

👥 作者与机构

Jeong-Hyun Cho1, Dong-Kyu Kim1, Hong-Hyun Bae1, Yong-Jin Lee1,2,

Seok-Tae Koh1, Younghwan Choo2, Ji-Seon Paek2, Hyun-Sik Kim1 KAIST, Daejeon, Korea Samsung Electronics, Hwaseong, Korea 1 2 For more efficient power management in