Low-Dropout (LDO) Regulator Output Impedance Analysis and Transient Performance Enhancement Circuit

被引：5
|
作者：
Lim, Sungkeun [1 ]
Huang, Alex Q. [1 ]
机构：
[1] N Carolina State Univ, SPEC, Raleigh, NC 27606 USA
来源：
2010 TWENTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC) | 2010年
关键词：
D O I：
10.1109/APEC.2010.5433489
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a low-dropout regulator with a transient performance enhancement circuit. The transient performance enhancement circuit improves the transient response time by sinking a remaining current in a power delivery path. Due to the limited control bandwidth, traditional LDO could not respond rapidly to the load transients. As a result, a large output voltage spike can be occurred and the output voltage settling time is long during the load transients. In this paper, the stability conditions and the output impedance of LDO are discussed, and the output voltage spike and current distributions in the power delivery path are analyzed. The theoretical analysis will be confirmed by the cadence simulation results.
引用
收藏
页码：1875 / 1878
页数：4
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