A 1.8V 30-to-70MHz 87% Peak-Efficiency 0.32mm2 4-Phase Time-Based Buck Converter Consuming 3µA/MHz Quiescent Current in 65nm CMOS

📋 论文概要

提出一种4相时间控制降压转换器，通过时间域控制取代传统PWM调制，在简化控制的同时实现高效率和低静态电流，解决了多相转换器设计复杂性和滞环控制非线性问题。

💡 主要创新点

• 采用基于时间（time-based）的控制架构，无需复杂PWM调制，实现简洁的多相电流共享与调节。
• 在1.8V供电、30-70MHz开关频率下实现87%峰值效率和3µA/MHz超低静态电流，面积仅0.32mm²。

🏷 关键词

📄 原文摘要

in terms of high output power, low ripple, fast load transient response, high efficiency across a very wide range of load currents, and alleviated output filter requirements. However, the need for complex controllers that ensure accurate regulation and uniform current sharing between phases along with generation of multiple matched pulse-width modulated (PWM) signals complicate the design of multi-phase converters. Hysteretic control offers the simplest means to implement multi-phase converters and has been widely used in the prior art [1]. However, its nonlinear behavior leads to large output ripple, unpredictable loop dynamics, and wide variation in switching frequency (FSW), which are undesirable in many noise-sensitive applications. Furthermore, they require

👥 作者与机构

Seong Joong Kim1, Romesh Kumar Nandwana1, Qadeer Khan2,

Robert Pilawa-Podgurski1, Pavan Kumar Hanumolu1 University of Illinois, Urbana, IL, 2Qualcomm, San Diego, CA 1 Multi-phase switching DC-DC converters offer many advantages