Analysis and Design of a High-Stability,High-Accuracy,Low-Dropout Voltage Regulator

作     者：沈良国 严祖树 王钊 张兴 赵元富 Shen Liangguo;Yan Zushu;Wang Zhao;Zhang Xing;Zhao Yuanfu

作者机构：北京大学微电子学系北京100871 北京微电子技术研究所北京100076 中星微电子有限公司北京100083 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2007年第28卷第12期

页      码：1872-1877页

摘      要：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 polezero 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.

主 题 词：voltage regulator LDO slow-rolloff frequency compensation line regulation load regulation 

学科分类：080801[080801] 0808[工学-自动化类] 08[工学] 

核心收录：

D　O　I：10.3969/j.issn.1674-4926.2007.12.005

馆 藏 号：203332440...