Paper Info
Title
Design Of Self-Referenced Wide Input Voltage Range Ldo Using Enhanced Current Mirror Buffer And Improved Lead Compensation
Abstract
This letter presents the self-referenced architecture to simplify design process and current mirror based power stage with wide input voltage to expand the application range of low-dropout (LDO) regulator. Featuring a BiCMOS symmetrical operational transconductance amplifier (OTA) whose input and power supply are also the output of LDO, the LDO itself is a voltage reference as well as a voltage regulator. Improved phase lead compensation is applied with much smaller compensation capacitor, and enhanced current mirror (ECM) buffer is introduced. Experimental results of the proposed LDO in a 0.18 mu m BCD process verified this self-referenced structure. The measured maximum input voltage is 12 V and the power supply rejection (PSR) is -40 dB at 50 KHz. The line regulation is 0.34 mV/V and total quiescent current is about 8.2 mu A at light load.
Year
DOI
Venue
2020
10.1587/elex.17.20200120
IEICE ELECTRONICS EXPRESS
Keywords
DocType
Volume
LDO, mixed-mode bandgap technique, self-referenced, wide input, lead compensation
Journal
17
Issue
ISSN
Citations 
11
1349-2543
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Sheng Liu100.34
Menglian Zhao22211.35
Zhao Yang301.35
Xiaobo Wu4112.89