A flipped-voltage-follower-based low-dropout regulator with signal- and transient-current boosting

A flipped-voltage-follower-based low-dropout regulator (FVF-LDO) with signal- and transient-current boosting (STCB) is proposed in this paper. The embedded STCB structure to FVF-LDO enhances both loop gain and loop bandwidth, while the FVF-LDO remains its double-pole single-zero property within the...

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Bibliographic Details
Published in:Analog integrated circuits and signal processing 2020-12, Vol.105 (3), p.471-476
Main Authors: Woo, Yuet Ho, Ho, Koi Shu, Lin, Yajun, Zhou, Yong, Leung, Ka Nang, Zheng, Yanqi, Guo, Jianping
Format: Article
Language:English
Subjects:
Circuits and Systems
CMOS
Electric potential
Electrical Engineering
Embedded structures
Engineering
Signal,Image and Speech Processing
Voltage
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Summary:A flipped-voltage-follower-based low-dropout regulator (FVF-LDO) with signal- and transient-current boosting (STCB) is proposed in this paper. The embedded STCB structure to FVF-LDO enhances both loop gain and loop bandwidth, while the FVF-LDO remains its double-pole single-zero property within the loop bandwidth and can be stabilized by an external output capacitor to achieve dominant-pole frequency compensation. The proposed LDO designed in a 65-nm CMOS technology operates at a minimum of 1 V, provides an output of 0.85 V, and delivers a maximum of 50 mA. The figure-of-merit of proposed FVF-LDO is 1.98 ps.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-020-01727-5