A Digital Low-dropout Regulator with A Voltage Differential Detector for Removing Transient Oscillation

被引：1
|
作者：
Woo, Ki-Chan [1 ]
Yang, Byung-Do [2 ]
机构：
[1] Chungbuk Natl Univ, Cheongju, South Korea
[2] Chungbuk Natl Univ, Dept Elect Engn, Cheongju, South Korea
来源：
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE | 2019年 / 19卷 / 05期
基金：
新加坡国家研究基金会;
关键词：
Coarse-fine; digital LDO; oscillation; settling time; voltage differential detector;
D O I：
10.5573/JSTS.2019.19.5.492
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：
A digital low-dropout regulator (D-LDO) with a voltage differential detector for removing transient oscillation is proposed. The conventional D-LDO uses a coarse-fine method to reduce settling time and quiescent current. However, the coarse-fine method leads to transient oscillation when a large load current transition occurs. The proposed D-LDO removes the transient oscillation by using the voltage differential detector and dividing the coarse mode into matching and tracking modes. It was implemented using a 65 nm CMOS process. When the load current changes from 2 mA to 12 mA, the overshoot is 35 mV, the undershoot is 58 mV, and the settling time is 610 ns. The quiescent current is 7.04 mu A.
引用
收藏
页码：492 / 497
页数：6
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