DocumentCode
3227824
Title
A high precision low dropout regulator with nested feedback loops
Author
Kuo, Ron-Chi ; Tsai, Tung-Han ; Hsieh, Yi-Jie ; Wang, Chua-Chin
Author_Institution
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
fYear
2010
fDate
6-9 Dec. 2010
Firstpage
664
Lastpage
667
Abstract
A high precision low dropout regulator (LDO) with nested feedback loops is proposed in this paper. By nesting a zero-tracking compensation loop inside of the negative feedback loop comprising an Error Amplifier, the independence of off-chip capacitor and ESR is ensured for different load currents and operating voltages. Therefore, in low Iddq or low voltage scenarios, the total error of the output voltage caused by line and load variations is less than ±3% according to on-silicon measurement results.
Keywords
amplifiers; feedback; voltage regulators; error amplifier; line variations; load variations; low dropout regulator; negative feedback loop; nested feedback loops; off-chip capacitor; zero-tracking compensation loop; Capacitors; Current measurement; Noise; Photonic band gap; Poles and zeros; Regulators; Voltage control; LDO; Low dropout; low noise;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems (APCCAS), 2010 IEEE Asia Pacific Conference on
Conference_Location
Kuala Lumpur
Print_ISBN
978-1-4244-7454-7
Type
conf
DOI
10.1109/APCCAS.2010.5774832
Filename
5774832
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