An Inductor-at-Middle Hybrid Buck Converter with Shared Power-Signal Path for Distributed Vertical Power Delivery

📋 论文概要

本文提出了一种电感位于中间（inductor-at-middle）的混合降压转换器，用于高电流密度垂直供电。通过开关总线复用控制，将功率电感复用为信号反馈路径，简化了引脚密集型分布式供电网络中信号与功率网络的协同设计。原型实现了3.17A/mm2的垂直电流密度。

💡 主要创新点

• 提出电感位于中间的混合降压拓扑，优化垂直供电电流密度。
• 通过开关总线复用控制，共享功率-信号路径，消除复杂的信号与功率网络协同设计挑战。
• 实现高垂直电流密度3.17A/mm2，适用于XPU等高性能负载。

🏷 关键词

📄 原文摘要

Abstract This work presents an inductor-at-middle hybrid buck converter for high-current density vertical power delivery, reusing the power inductors as signal feedback paths. The proposed switching-bus-multiplexing control reuses the power path to carry a feedback signal, mitigating the challenges in sophisticated signal and power network co-design for pinintensive distributed power delivery networks. The prototype achieves a vertical current density of 3.17A/mm2. State-of-the-art XPU platforms, including CPUs, GPUs, and AI accelerators, demand everincreasing supply currents that can exceed hundreds of Amperes. Meanwhile, conventional 2D power delivery from PCB to processor suffers from severe IR drop, routing congestion, and efficiency loss [1]. To alleviate these issues, vertical power delivery (VPD) has emerged, where voltage regulators are placed directly beneath the processor die, minimizing

👥 作者与机构

Zhongyao Zhu1,2, Junwei Huang2, Zhibang Song1,2, Zhewen Yu1,2, Shousheng Han2, Sai-Weng Sin2, Yan Lu1

Tsinghua University, Beijing, China, 2University of Macau, Macau, China