Analysis and design of voltage controlled current source for LDO frequency compensation

被引：0
|
作者：
Bian, Qiang [1 ]
Yan, Zushu [1 ]
Zhao, Yuanfu [1 ]
Yue, Suge [1 ]
机构：
[1] Beijing Microelect Technol Inst, Beijing, Peoples R China
来源：
2005 IEEE CONFERENCE ON ELECTRON DEVICES AND SOLID-STATE CIRCUITS, PROCEEDINGS | 2005年
关键词：
D O I：
暂无
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：
Using voltage controlled current source (VCCS) instead of electrical series resistance (ESR) of load capacitor to create a zero is a novel LDO frequency compensation scheme. This paper analyzes this compensation scheme, and reveals that the VCCS circuit conduces to the improvements of transient response and PSR performance of LDO. A new area compact VCCS circuit that has a nearly ideal performance in wide frequency spectrum up to 5MHz is also presented. Using VCCS, a LDO with 300mV dropout, 2.5V output voltage and 100mA output current is designed in 0.5 mu m CMOS technology with pretty frequency performance, transient response and PSR performance. The total on-chip capacitor employed in this LDO is less than 1pF.
引用
收藏
页码：363 / 366
页数：4
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