摘要
针对规模与功耗骤增的集成电路发展趋势,设计了一种可以提供宽范围负载电流的无片外电容型低压差线性稳压器(CL-LDO).为了解决宽范围负载电流与无片外电容等需求所带来的稳定性问题与瞬态特性问题,提出了动态零点补偿的方式与瞬态增强电路结构,既保障了整体电路在全负载范围内保持稳定,又实现了较好的瞬态特性.基于0.11μm CMOS工艺,完成电路设计、版图设计与仿真,仿真结果表明,在0~500 mA的负载范围内,整体环路增益可以达到68 dB;最小相位裕度为56°;当负载电流在1~500 mA之间发生跳变时(Δt=500 ns),输出过冲和下冲分别为56 mV和141 mV,建立时间分别为2μs和0.78μs;PSR为-67.2 dB@1 kHz,负载调整率为0.137μV/mA.
Aiming at the development trend of integrated circuits(ICs) with rapid increase in scale and power consumption,a novel capacitor-less low-drop-out linear voltage regulator(CL-LDO) has been designed to provide a wide range of load currents.To solve the issues of stability and transient response caused by the requirements of a wide range of load currents and no off-chip capacitor,a dynamic zero-point compensation method and a transient enhancement circuit structure are proposed,which not only ensures the stability of the whole circuit in the full load range,but also achieves excellent transient characteristics.Based on 0.11 μm CMOS technology,the circuit design,layout design and simulation are completed.The simulation results show that the overall loop gain can reach 68 dB with a minimum phase margin of 56° within the load range of 0 mA to 500 mA,the output overshoot and undershoot are 56 mVand 141 mV,and their settling time is 2 μs and 0.78 μs,respectively,when load current transients range from 1 mA to 500 mA (Δt=500 ns),the power supply rejection(PSR) is-67.2 dB@1 kHz,and the load regulation rate is 0.137 μV/mA.
作者
唐俊龙
关浩
邓欢
李振涛
邹望辉
TANG Junlong;GUAN Hao;DENG Huan;LI Zhentao;ZOU Wanghui(School of Physics and Electronic Science,Changsha University of Science and Technology,Changsha 410011,China;Hunan Guliang Microelectronics Co.,Ltd.,Changsha 410008,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第8期109-116,共8页
Journal of Hunan University:Natural Sciences
基金
柔性电子材料基因工程湖南省重点实验室开放基金(202015)。
关键词
低压差线性稳压器
动态零点补偿
瞬态增强
宽范围负载
low-drop-out linear voltage regulator
dynamic zero-point compensation
transient enhancement
wide range load
