摘要
SoC系统集成芯片的发展增加了对于无片外电容LDO的需求,而无片外电容LDO无法利用片外电容固定主极点以及片外电容与ESR电阻产生补偿零点,也无法利用片外电容为其提供负载电流瞬态变化时的充放电电流,稳定性和瞬态特性成为了无片外电容LDO首要解决的问题。文章分析了无片外电容LDO的稳定性和瞬态特性设计难点,回顾了无片外电容LDO关于提高稳定性和快速瞬态响应能力的最新研究成果,并对LDO的发展进行了展望。
The development of SoC system integration chips has increased the demand for capacitor-less LDO. Capacitor-less LDO can＇ t utilize an off-chip capacitor to regulate dominant to generate the compensation zero with its ESR resistor. It cannot also pro pole, as well as vide charge and using the off-chip capacitor discharge current when the load current transiently changes. Therefore stability and transient characteristics become the primary problems to he solved for a capacitor-less LDO. In this paper, we analyze the design difficulties of stability and transient characteristics of a capacitor-less LDO, review the latest researches of capacitor-less LDO for improving the stability and fast transient response, and prospect the development of LDO.
作者
姚若河
王超
邝国华
YAO Ruo-he;WANG Chao;KUANG Guo-hua(School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China;Guangdong Hiway Integrated Circuit Technology Co., Ltd., Dongguan 523808, China)
出处
《中国集成电路》
2018年第3期30-38,共9页
China lntegrated Circuit
基金
广东省科技计划项目(2015B090909001)
