An 82.4% Efficiency Package-Bondwire-Based Four-Phase Fully Integrated Buck Converter with Flying Capacitor for Area Reduction

📋 论文概要

本文提出一种基于封装键合线作为电感器的四相全集成降压转换器，采用飞电容技术减少片上去耦电容面积5倍，实现82.4%的峰值效率。解决了多相转换器中电感面积大和输出纹波的问题。

💡 主要创新点

• 使用封装键合线作为集成电感，无需额外电感元件，降低成本。
• 采用飞电容技术实现四相降压转换，显著减小片上去耦电容面积。
• 四相结构有效抵消输出纹波，提高输出功率容量。

🏷 关键词

📄 原文摘要

Multi-phase converters have become a topic of great interest due to the high output power capacity and output ripple cancellation effect. They are even more beneficial to nowadays high-frequency fully integrated converters with output capacitor integrated on-chip. As one of the dominant chip area consumers, reducing the size of the on-chip decoupling capacitors directly leads to cost down. It is reported that a 5× capacitor area reduction can be achieved with a four-phase converter compared to a single-phase one [1]. However, the penalty is obvious. Every extra phase comes with an inductor, which is also counted as cost and becomes more dominant with increase in the number of phases. Previous works implement inductors either with on-chip spiral metal inductors [2,3], which is expensive in terms of chip area, or on-package air-core SMD inductors [1,4], which is also costly with additional SMD inductors. To minimize

👥 作者与机构

Cheng Huang, Philip K. T. Mok

HKUST, Hong Kong, China