A 500mA Analog-Assisted Digital-LDO-Based On-Chip Distributed Power Delivery Grid with Cooperative Regulation and IR-Drop Reduction in 65nm CMOS

📋 论文概要

该论文提出了一种500mA模拟辅助数字LDO（Analog-Assisted Digital-LDO）用于片上分布式电源传输网格（DPDG），通过协作调节降低IR drop并改善瞬态响应，解决了传统分布式调节器纹波大和功耗高的问题。

💡 主要创新点

• 提出模拟辅助数字LDO结构，结合数字LDO的低功耗和模拟LDO的快速响应优势。
• 实现分布式电源传输网格中的协作调节机制，有效降低片上IR drop。
• 在500mA负载能力下实现紧凑的片上电源分配，适用于大尺寸处理器芯片。

🏷 关键词

📄 原文摘要

Qualcomm, Singapore 1 2 With the die area of modern processors growing larger and larger, the IR drop across the power supply rail due to its parasitic resistance becomes considerable. There is an urgent demand for local power regulation to reduce the IR drop and to enhance transient response. A distributed power-delivery grid (DPDG) is an attractive solution for large area power-supply applications. The dual-loop distributed micro-regulator in [1] achieves a tight regulation and fast response, but suffers from large ripple and high power consumption due to the comparatorbased regulator. Digital low-dropout regulators (DLDOs) [2] can be used as local micro-regulators to implement a DPDG, due to their low-voltage operation and process scalability. Adaptive control [3], asynchronous 3D pipeline control [4], analog-assisted tri-loop control [5], and event-driven PI control [6] are proposed to enhance the transient response speed. However, digital LDOs suffer from the

👥 作者与机构

Yasu Lu1, Fan Yang2, Feng Chen1, Philip K. T. Mok1

Hong Kong University of Science and Technology, Hong Kong, China