LDO降压转换器的稳定性分析  

An Analysis on the Stability of LDO Regulators

作　　者：马勋[1] 张波[1] 

机构地区：[1]电子科技大学IC设计中心,四川成都610054

出　　处：《微电子学》2004年第2期142-144,147,共4页Microelectronics

摘　　要：　通过对LDO降压转换器的原理分析,并借助频域的傅里叶分析方法,对其稳定性和频率响应进行了深入的理论研究,得到了提高系统稳定性的补偿方法。频率响应和瞬态响应的仿真结果表明,这种方法显著改善了LDO降压转换器的频率响应,并极大地提高了其稳定性。Based on the analysis of the principle of low dropout (LDO) regulators and by means of the frequency domain Fourier analysis, an in-depth theoretical study is made on the stability and frequency response of LDO regulators. A compensation method has been developed to improve the system stability. Results from simulations of both frequency and transient responses show that the frequency response and stability of the LDO regulator are greatly improved by using the proposed method.

关 键 词：LDO 降压转换器 稳定性 频率响应 ESR 调整管 电压基准源 误差放大器 电阻反馈网络 

分 类 号：TM42[电气工程—电器]