A 12V-to-1V Quad-Output Switched-Capacitor Buck Converter with Shared DC Capacitors Achieving 90.4% Peak Efficiency and 48mA/mm3 Power Density at 85% Efficiency

📋 论文概要

本文提出一种12V到1V的四输出开关电容降压转换器，采用共享直流电容器实现多输出，用于DDR5内存模块等数据中心应用，峰值效率达90.4%。解决了单电感多输出方案效率低和交叉调节差的问题。

💡 主要创新点

• 提出共享直流电容器的多输出开关电容降压架构，无需多个电感。
• 实现12V直接到1V的高效转换，峰值效率90.4%。

🏷 关键词

📄 原文摘要

Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 Direct 12V-to-1V power delivery has become popular in datacenter applications. Multiple outputs regulated by switching regulators are favorable to reduce the energy overhead. For example, from Fig. 11.2.1, a DDR5 dual in-line memory module (DIMM) requires multiple 1.1V and 1.8V for core, I/O and word line boost supplies, each has several amperes of peak current. Single-inductor-multi-output (SIMO) design may be a low-cost solution, but it has a low efficiency and cross regulation. A widely used scheme is to supply each output with an independent converter [1]. For the 12V-to-1V application, the conventional buck converter has a high switching loss. This leads to a low switching frequency fSW, and hence a large inductor and low power density. Hybrid converters, such as multi-level converters [2], reduce the voltage stress of switches, and thus can

👥 作者与机构

Tingxu Hu1, Mo Huang1, Yan Lu1, Rui P. Martins1,2

University of Macau, Macau, China