A 12-to-1V 90.5%-Peak-Efficiency 721A/cm3-Current-Density Quad-Output Converter with One Shared DC Capacitor

📋 论文概要

本文提出一种12V转1V的四输出混合DC-DC转换器，通过共享单个DC电容实现能量存储与再分配，从而支持各输出独立调节。该转换器达到721A/cm³电流密度和90.5%峰值效率，且负载瞬态响应无交叉调节问题。

💡 主要创新点

• 采用单个共享DC电容实现四输出独立调节，大幅减少无源元件数量和体积，提升功率密度。
• 实现721A/cm³的高电流密度和90.5%的峰值效率，同时保持无交叉调节的稳定输出。

🏷 关键词

📄 原文摘要

Abstract This paper presents a 12-to-1V 4-output hybrid DC-DC converter that shares a single DC capacitor among all outputs. This shared capacitor stores and redistributes energy, ensuring independent regulation at each output. The proposed design achieves a 721A/cm3 current density and 90.5% peak efficiency at 12-to-1.1V at 2MHz, delivering up to 16A of total load current. The measured results during load transients shows there is no cross-regulation issue. 12-to-1V DC-DC converters are ubiquitous in data-center platforms, many of which must generate several supply rails on the same board. In DDR5 DIMMs, for example (Fig. 26.4.1, top left), a PMIC typically supplies 1.1V and 1.8V for core and I/O, while ever-increasing memory bandwidth pushes requirements for higher efficiency and current density. To improve efficiency and current density, several hybrid topologies have been proposed. By

👥 作者与机构

Qingqing Min1, Jinyi Yuan1, Ji Jin1, Yichao Ji1, Weiwei Xu2, Lin Cheng1,2

University of Science and Technology of China, Hefei, China, 2Hefei CLT Microelectronics, Hefei, China