DocumentCode
1516760
Title
Combination method of DC-DC converter and LDO to improve efficiency and load regulation
Author
Shen, Z.-H. ; Min, Hwang-Ki
Author_Institution
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Volume
47
Issue
10
fYear
2011
Firstpage
615
Lastpage
617
Abstract
Presented is a new combination method of a DC-DC converter and a low dropout voltage regulator (LDO), where the DC-DC converter takes the output voltage of the LDO´s error amplifier as the feedback voltage. This new method can dynamically adjust the dropout voltage of the LDO according to load current so that efficiency is improved especially for driving small loads. Simultaneously, this method can dramatically improve load regulation by reducing the variation of the input voltage difference of the LDO´s error amplifier.
Keywords
DC-DC power convertors; amplifiers; load regulation; voltage regulators; DC-DC converter; LDO error amplifier; dropout voltage regulator; load current; load regulation;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2010.7135
Filename
5767256
Link To Document