电源学报

一种具有快速瞬态响应的无片外电容低压差线性稳压器

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程铁栋 , 谈泽辉 , 许立军 , 徐振轩

电源学报 | DC-DC变换器 2025,23(6): 105-113

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电源学报 |DC-DC变换器 2025 , 23 (6) : 105 -113

一种具有快速瞬态响应的无片外电容低压差线性稳压器

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程铁栋, 谈泽辉, 许立军, 徐振轩

作者信息

江西理工大学电气工程与自动化学院，赣州　341000

通讯作者:

程铁栋（1975—　），男，通信作者，博士，副教授。研究方向：电子技术研究。E-mail：chengtiedong@126.com。

作者简介:

谈泽辉（1999—　），男，硕士。研究方向：模拟集成电路电源管理与设计。E-mail：2463920738@qq.com。

许立军（1983—　），男，博士。研究方向：FPGA图像处理及数字电路电源管理。E-mail：61383150@qq.com。

徐振轩（2001—　），男，本科。研究方向：电源电路设计。E-mail：1594404903@qq.com。

Output-capacitorless LDO Regulator with Fast Transient Response

Tiedong CHENG, Zehui TAN, Lijun XU, Zhenxuan XU

Affiliations

School of Electrical Engineering and Automation, Jiangxi University of Science and Technology, Ganzhou 341000, China

出版时间: 2025-10-30 doi: 10.13234/j.issn.2095-2805.2025.6.105

文章导航

摘要

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针对无片外电容LDO（low dropout）瞬态响应差的问题，提出了1种具有快速瞬态响应的无片外电容低压差LDO线性稳压器，并通过电压上冲和下冲抑制电路来对电压的跳变进行抑制，改善了LDO的瞬态响应特性。设计了改进的误差放大器，其增益在静态工作状态下较一般误差放大器更大。此外，在输出电压跳变时，所设计的误差放大器可输出更大的瞬态电流，实现对功率管的快速充放电。使用Current buffer的Miller补偿，通过较小的电容面积完成了电路相位裕度的补偿。仿真结果表明：在2.8~3.3 V时，该电路的输出电压为1.8 V，最大负载电流为50 mA；负载电流在1~50 mA之间跃变时，在瞬态增强电路的作用下，输出电压的下冲幅度减少了46 mV，下降了51%，响应时间为1.16 µs；上冲幅度减少了29 mV，下降了35%，响应时间为1.18 µs。

关键词

无片外电容 / 低压差线性稳压器 / 瞬态增强 / 快速瞬态响应

Abstract

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In view of the poor tiansient response of the output-capacitorless, an output-capacitorless low dropout (LDO) regulator with fast transient response is proposed, and the voltage overshoot and undershoot suppression circuits are used to suppress voltage jumps, thus improving the transient response characteristics of the LDO regulator. An improved error amplifier is designed, whose gain is larger than that of a general error amplifier in static working states. In addition, the transient output current from the designed error amplifier can be increased when the output voltage jumps, and the charging and discharging of the power tube can be accelerated. By using Current buffer Miller compensation, the phase margin of the circuit is compensated with a smaller capacitive area. Simulation results show that when the voltage range is 2.8~3.3 V, the output voltage from the circuit is 1.8 V and the maximum load current is 50 mA. When the load current jumps between 1 and 50 mA, the undershoot amplitude of output voltage is reduced by 46 mV (51%) and the response time is 1.16 µs under the effect of the transient enhancement circuit. Meanwhile, the overshoot amplitude is reduced by 29 mV (35%), and the response time is 1.18 µs.

Key words

Output-capacitorless / low dropout (LDO) regulator / transient enhancement / fast transient response

引用本文

程铁栋, 谈泽辉, 许立军, 徐振轩. 一种具有快速瞬态响应的无片外电容低压差线性稳压器. 电源学报, 2025 , 23 (6) : 105 -113 . DOI: 10.13234/j.issn.2095-2805.2025.6.105

Tiedong CHENG, Zehui TAN, Lijun XU, Zhenxuan XU. Output-capacitorless LDO Regulator with Fast Transient Response[J]. Journal of Power Supply, 2025 , 23 (6) : 105 -113 . DOI: 10.13234/j.issn.2095-2805.2025.6.105

基金

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江西省教育厅科学技术重点研究资助项目(GJJ200804)
江西理工大学博士启动基金资助项目(GJJ191206)

参考文献

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2025年第23卷第6期

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文章信息

doi: 10.13234/j.issn.2095-2805.2025.6.105

接收时间：2023-06-09
首发时间：2026-10-26
出版时间：2025-10-30

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出版历史

收稿日期：2023-06-09
修回日期：2023-07-31
录用日期：2023-08-24

基金

Jiangxi Provincial Education Department Science and Technology Key Research Project(GJJ200804)

江西省教育厅科学技术重点研究资助项目(GJJ200804)

Jiangxi University of Science and Technology Doctor's Start-up Fund(GJJ191206)

江西理工大学博士启动基金资助项目(GJJ191206)

作者信息

江西理工大学电气工程与自动化学院，赣州　341000

通讯作者:

程铁栋（1975—　），男，通信作者，博士，副教授。研究方向：电子技术研究。E-mail：chengtiedong@126.com。

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https://castjournals.cast.org.cn/joweb/dyxb/CN/10.13234/j.issn.2095-2805.2025.6.105

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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