Dynamic-Replica-Based All-Condition-Stable LDO Regulator with 5X Improved Load Regulation

Wang, Guanhua; Zhan, Chenchang; Tang, Junyao; Zhang, Ning

10.1109/CICTA.2018.8706070

2018

978-1-5386-6552-7

PROCEEDINGS OF 2018 IEEE INTERNATIONAL CONFERENCE ON INTEGRATED CIRCUITS, TECHNOLOGIES AND APPLICATIONS (ICTA 2018)

49-50

21-23 Nov. 2018

Beijing, China

345 E 47TH ST, NEW YORK, NY 10017 USA

IEEE

An NMOS LDO regulator using a dynamic replica to significantly improve the regulation precision is presented. By sensing the load current and dynamically adjusting the replica current, the power transistor is biased properly to improve regulation without compromising the all-condition stability of a classical fixed-replica regulator. The proposed LDO regulator is implemented in a 0.18-mu m CMOS process, occupying an active chip area of 0.039 mm(2). With 1.2 V input and 1.1 V nominal output voltage, the proposed design achieves 5 times improved load regulation, at the same time demonstrating stable and fast transient responses over the wide load capacitance range from 0 to virtually infinity.

NMOS LDO dynamic-replica current sensor

第一 ; 通讯

英语

CPCI-S ; EI

NSFC[61604067]

Engineering

Engineering, Electrical & Electronic

WOS:000469280200020

20192106967003

Capacitance ; Transient analysis

Electricity: Basic Concepts and Phenomena:701.1 ; Control Equipment:732.1

Web of Science

Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China

Wang, Guanhua,Zhan, Chenchang,Tang, Junyao,et al. Dynamic-Replica-Based All-Condition-Stable LDO Regulator with 5X Improved Load Regulation[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2018:49-50.