Design of a high stability LDO without off-chip capacitor

Huo Dexuan; Zhang Guojun

doi:10.16157/j.issn.0258-7998.190920

Dianzi Jishu Yingyong (Jan 2020)

Design of a high stability LDO without off-chip capacitor

Huo Dexuan,
Zhang Guojun

Affiliations

Huo Dexuan: State Key Laboratory of Electronic Thin Films and Integrated Devices，University of Electronic Science and Technology of China， Chengdu 610054，China
Zhang Guojun: State Key Laboratory of Electronic Thin Films and Integrated Devices，University of Electronic Science and Technology of China， Chengdu 610054，China

DOI: https://doi.org/10.16157/j.issn.0258-7998.190920
Journal volume & issue: Vol. 46, no. 1
pp. 44 – 47

Abstract

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This paper is aimed at researching and designing LDOs without off-chip capacitors. Whether the LDO can stabilize the output voltage when there is no external capacitor is studied. Based on this, a new type of high-stability LDO structure with no off-chip capacitor is studied to apply power to the internal circuit module in the DC-DC converter. The poles of the LDO are adjustd by adjusting the internal op amp structure and Miller compensation of the op amp. The simulation results show that the structure has high stability and can output a stable voltage.

Published in Dianzi Jishu Yingyong

ISSN: 0258-7998 (Print)
Publisher: National Computer System Engineering Research Institute of China
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Electronics
Website: http://journal.chinaaet.com/en

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