A three-stage LDO with active feedback frequency compensation and slew-rate enhancement

This paper presents a low drop-out (LDO) regulator using an active feedback frequency compensation (AFFC) structure for compensation. By eliminating the right-half-plane zero and bringing a left one, the phase margin and the stability can be improved. And the compensation loop reuses the current in...

Full description

Saved in:
Bibliographic Details
Main Authors: Tongning Hu, Bo Wang, Ke Lin, Yi Peng, Xin'an Wang
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
Circuit stability
Q-factor
Regulators
Stability analysis
Transient analysis
Transient response
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a low drop-out (LDO) regulator using an active feedback frequency compensation (AFFC) structure for compensation. By eliminating the right-half-plane zero and bringing a left one, the phase margin and the stability can be improved. And the compensation loop reuses the current in the first stage to minimize the quiescent current. A slew-rate enhancement circuit is presented to speed up transient response. The LDO regulator provides full range stability from 0 to 100mA load current. The LDO is simulated in a 0.18um CMOS process, supplying 1.6V with a dropout voltage of 181mV. The quiescent current is 29uA for 100pF load capacitor.
ISSN:2162-7541
2162-755X
DOI:10.1109/ASICON.2013.6812035