半导体学报2007，Vol.28Issue(12)：1872-1877,6.
一种高稳定性高精度低压差线性稳压器的分析与设计
Analysis and Design of a High-Stability,High-Accuracy,Low-Dropout Voltage Regulator
沈良国 1严祖树 2王钊 3张兴 1赵元富2
作者信息
- 1. 北京大学微电子学系,北京,100871
- 2. 北京微电子技术研究所,北京,100076
- 3. 中星微电子有限公司,北京,100083
- 折叠
摘要
Abstract
A high-accuracy,low-dropout (LDO) voltage regulator is presented.Using the slow-rolloff frequency compensation scheme,the LDO effectively overcomes the stability problem,facilitates the use of a ceramic capacitor,and improves the output voltage accuracy,which is critical for powering high-performance analog circuitry.The slow-rolloff compensation scheme is realized by introducing three pole-zero pairs,including the proposed pole-zero pair and sense zero.The post-layout simulation results demonstrate that this LDO has robust system stability,a high open-loop gain,and a high unit-gain frequency,which lead to excellent regulation and transient response performance.The line and load regulation are 27μV/V and 3.78μV/mA,and the overshoots of the output voltage are less than 30mV,while the dropout voltage is 120mV for a 150mA load current.关键词
线性稳压器/低压差/缓慢滚降式频率补偿/线性调整率/负载调整率Key words
voltage regulator/LDO/slow-rolloff frequency compensation/line regulation/load regulation分类
电子信息工程引用本文复制引用
沈良国,严祖树,王钊,张兴,赵元富..一种高稳定性高精度低压差线性稳压器的分析与设计[J].半导体学报,2007,28(12):1872-1877,6.
