A 99.99% current efficiency fast transient response capacitor-less LDO with feedforward compensation technique based on small-signal gain stage

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Aeu-International Journal of Electronics and Communications Pub Date : 2024-08-28 DOI:10.1016/j.aeue.2024.155501

Qingyu Tang, Xiao Zhao, Zewei Zhang, Qisheng Zhang

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Abstract

An ultra-low power capacitor-less LDO with feedforward compensation technique based on the small-signal gain stage and composite transient enhancement structure is proposed. The feedforward compensation technique based on the small-signal gain stage reaches a low frequency zero ,by utilizing the compensating effect of the zero to relieve the adverse effects of the pole, thereby enhancing the stability and performance of the circuit. Furthermore, the small gain stage can adjust the quiescent current consumption,contributing to a significant reduction in system energy consumption. The proposed composite transient enhancement structure can reduce the transition time of the circuit, adjust the gain of the circuit under different operating conditions to achieve precise gain control and improve the transient performance of the system. The proposed LDO is designed using SMIC 0.18um CMOS process. The simulation results show the total quiescent current is 0.94 $u A$ and the current efficiency is up to 99.99%. The extremely low FoM value of 0.04 represents a good transient performance. Synthesizing the comparison of various parameters, the superiority of this design can be clearly concluded.

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基于小信号增益级的前馈补偿技术的 99.99% 电流效率快速瞬态响应无电容 LDO

本文提出了一种基于小信号增益级和复合瞬态增强结构的前馈补偿技术的超低功耗无电容 LDO。基于小信号增益级的前馈补偿技术可以达到低频零点，利用零点的补偿效应缓解极点的不利影响，从而提高电路的稳定性和性能。此外，小增益级还能调节静态电流消耗，从而显著降低系统能耗。所提出的复合瞬态增强结构可以缩短电路的过渡时间，在不同工作条件下调节电路增益，实现精确的增益控制，提高系统的瞬态性能。所提出的 LDO 采用中芯国际 0.18um CMOS 工艺设计。仿真结果显示，总静态电流为 0.94uA，电流效率高达 99.99%。0.04 的超低 FoM 值代表了良好的瞬态性能。通过对各种参数的综合比较，可以清楚地得出该设计的优越性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.