A 30MHz Hybrid Buck Converter with 36mV Droop and 125ns 1% Settling Time for a 1.25A/2ns Load Transient

📋 论文概要

该论文提出了一种30MHz混合型降压转换器，通过混合控制架构和快速瞬态响应技术，在1.25A/2ns负载瞬态下实现了36mV的电压跌落和125ns的1%建立时间，解决了现代SoC对快速负载瞬态响应的需求。

💡 主要创新点

• 提出混合型降压转换器架构，结合了电压模式和电流模式控制的优点，实现了高带宽和快速瞬态响应。
• 采用电容电流传感器校准技术和负载瞬态优化方法，显著提升了控制器的响应速度。
• 通过优化电感电流斜率，在30MHz开关频率下实现了极低的电压跌落和快速建立时间。

🏷 关键词

📄 原文摘要

Fast load-transient responses are crucial for DC-DC converters to cope with the demands of modern highly integrated system-on-chip (SoC) designs. Various techniques have been proposed to improve transient responses by enhancing the speed of the controller, and/or by increasing the slew rate of the inductor current (SRL), as shown in Fig. 10.6.1. To enhance the speed of the controller, a capacitorcurrent-sensor (CCS) calibration technique with load-transient optimization (LTO) is proposed for current-mode control in [1], and zero-delay synchronized (ZDS) and quasi-current-mode hysteretic control are proposed in [2] and [3], respectively. Although these converters may achieve near-optimal transient responses (only limited by SRL), the circuit complexity is greatly increased. To increase SRL, multiphase topologies have been widely used [1], [2,4]. For an Nphase converter, SRL can be effectively increased by N times, at the expense of

👥 作者与机构

Lin Cheng, Wing-Hung Ki

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