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An output capacitor‐less low‐dropout regulator with wide load capacitance and current ranges
Author(s) -
Zhang Zhang,
Xu Shu,
Wu Hongyuan,
Xie Guangjun,
Cheng Xin
Publication year - 2021
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2945
Subject(s) - capacitance , low dropout regulator , capacitor , line regulation , control theory (sociology) , frequency compensation , cmos , current (fluid) , dropout (neural networks) , load regulation , dropout voltage , electronic engineering , materials science , voltage , voltage regulator , electrical engineering , computer science , engineering , physics , control (management) , electrode , quantum mechanics , artificial intelligence , machine learning
Summary This paper presents an output capacitor‐less low‐dropout regulator (LDO) with wide load capacitance and current ranges. A new Miller compensation technique called multipath double‐nested Miller compensation with Q‐reduction circuit is introduced to extend the ranges of the load capacitance and current. Besides, a multiple small‐gain stages technology is applied to improve the loop gain of the LDO, achieving better management accuracy. The proposed LDO was fabricated in a 130‐nm CMOS process. The measured maximum load capacitance can be extended to 4.7 nF, and the maximum load current is 80 mA. Moreover, the measured line regulation and load regulation are 4 mV/V and 0.154 mV/mA, respectively.