A 0.9V 0.35µm Adaptively Biased CMOS LDO Regulator with Fast Transient Response

📋 论文概要

该论文提出了一种0.9V、0.35微米工艺的自适应偏置CMOS低压差线性稳压器（LDO），通过自适应偏置技术优化静态电流和瞬态响应，解决了便携设备中快速负载变化导致的输出电压跌落问题。

💡 主要创新点

• 提出了自适应偏置电路，根据负载电流动态调整偏置电流，实现低静态功耗和快速瞬态响应的平衡。
• 设计了快速环路响应机制，有效抑制了大规模负载跳变时的电压过冲和下冲。

🏷 关键词

📄 原文摘要

Portable applications often need multiple voltages controlled by a power management IC to power up many functional blocks [1]. A switching pre-regulator is usually followed by a low dropout (LDO) regulator to provide a regulated power source for noise-sensitive blocks. The LDO regulator has to be stable for all load conditions and frequency compensation is usually needed to stabilize the regulation loop [2, 3]. The output voltage droop due to rapid and large load changes could be minimized with a fast regulation loop, such that functional blocks powered by the same LDO regulator would have low crosstalk noise. LDO regulators with fast load transient response were demonstrated in [4] and [5]. In [4], the regulator was implemented in an advanced 90nm CMOS process and the fast feedback loop used a small 600pF filter capacitor for stability. The fast response required a large quiescent current of 6mA to deliver an output current of 100mA and the 10%P-P output voltage variations were relati

👥 作者与机构

Yat-Hei Lam, Wing-Hung Ki

Hong Kong University of Science and Technology, Kowloon, China