Open AccessLow quiescent current linear regulator using combination structure of bandgap and error amplifier
Author(s) -
Du HanXiao,
Lai XinQuan,
Liu Cong,
Chi Yuan
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.4277
Subject(s) - bandgap voltage reference , current (fluid) , linear regulator , voltage , low dropout regulator , amplifier , transient (computer programming) , transient response , control theory (sociology) , regulator , dropout voltage , electronic engineering , engineering , materials science , voltage regulator , electrical engineering , computer science , control (management) , cmos , chemistry , biochemistry , artificial intelligence , gene , operating system
A low quiescent current low dropout linear regulator (LDR) with a combination structure of a bandgap and an error amplifier is presented. The circuitry is achieved with a combined structure which is able to obtain a lower quiescent current, because the current for the specific bandgap reference can be omitted. The transient response enhancement circuit can activate an additional path to control the gate voltage of the pass device which assists in monitoring the variation in the output voltage in the steady state. According to restrictions of the process and the product requirements, this proposed LDR is implemented with high‐voltage tolerance double‐diffused MOS (DMOS) in a 0.6 μm BCD process. The LDR has a quiescent current of 3 μA and is able to deliver a 50 mA load current.