Essential Site Maintenance: Authorea-powered sites will be updated circa 15:00-17:00 Eastern on Tuesday 5 November.
There should be no interruption to normal services, but please contact us at [email protected] in case you face any issues.

loading page

A Capacitor-Free CMOS Low-Dropout Regulator with Gate-Couple Flipped Voltage Follower for SOC
  • +3
  • Yani Li,
  • Fuxiang Tong,
  • Zuoyi Zhang,
  • Zhuo Lv,
  • Linkun Zhang,
  • Zhangming Zhu
Yani Li
Xidian University School of Microelectronics
Author Profile
Fuxiang Tong
Xidian University School of Microelectronics

Corresponding Author:[email protected]

Author Profile
Zuoyi Zhang
Xidian University School of Microelectronics
Author Profile
Zhuo Lv
Xidian University School of Microelectronics
Author Profile
Linkun Zhang
Xidian University School of Microelectronics
Author Profile
Zhangming Zhu
Xidian University School of Microelectronics
Author Profile

Abstract

This paper proposes a fully integrated low dropout (LDO) regulator with gate-couple flipped voltage follower(GC-FVF). The proposed GC-FVF addresses the limited output swing issue of conventional PMOS FVF in LDOs while maintaining a low output impedance. Besides, this LDO introduces a cascode compensation loop, which, along with the low output impedance of GC-FVF, pushes the output pole far away from the unity-gain bandwidth under both light and heavy load conditions. Consequently, the LDO becomes a stable two-pole system, supporting a high loop gain of up to 100dB and significantly enhancing the load and line regulation. Key specifications include a preset output voltage of 1.8V, a minimum unregulated input voltage of 2V, a maximum output current of 100mA, a ground current of 32μA, and an active chip area of 260μm×180μm. Notably, this LDO achieves high load regulation of 4.8μV/mA and high line regulation of 13.8μV/V without the need for off-chip capacitors.
31 Jan 20241st Revision Received
31 Jan 2024Submission Checks Completed
31 Jan 2024Assigned to Editor
31 Jan 2024Review(s) Completed, Editorial Evaluation Pending
11 Feb 2024Reviewer(s) Assigned