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28 April 2023 Low dropout regulator with double operational amplifiers based on FVF structure
Lixue Tian, Xianjie Huo, Zhishuai Zhang, Wenzhe Ma, Yingtao Li
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Proceedings Volume 12610, Third International Conference on Artificial Intelligence and Computer Engineering (ICAICE 2022); 126100Q (2023) https://doi.org/10.1117/12.2671149
Event: Third International Conference on Artificial Intelligence and Computer Engineering (ICAICE 2022), 2022, Wuhan, China
Abstract
In this paper, low dropout voltage regulator based on Flipped Voltage Follower (FVF) is proposed. It is futured with fast transient response to load changes, high slew rate, and faster power-on time. The circuit proposed in the paper is adopted with double error amplifier and transient enhancement circuit. The major error amplifier can provide reference voltage for FVF structure and ensure flipped voltage stability. The auxiliary error amplifier is used to form a feedback loop at VOUT and VREF, improving the precision of output voltage, generating extra charge and discharge branch to provide greater slew rate, faster loop response, and faster power-on speed. The simulation results show that this LDO has output voltage jump less than 33mV and 150ns power-on time.
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Lixue Tian, Xianjie Huo, Zhishuai Zhang, Wenzhe Ma, and Yingtao Li "Low dropout regulator with double operational amplifiers based on FVF structure", Proc. SPIE 12610, Third International Conference on Artificial Intelligence and Computer Engineering (ICAICE 2022), 126100Q (28 April 2023); https://doi.org/10.1117/12.2671149
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KEYWORDS
Power supplies
Capacitors
Electrodes
Feedback loops
Negative feedback
Power consumption
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