Transfer Function Analysis of the Power Supply Rejection Ratio of Capacitor-Less LDOs

Feng, Chen; Lu, Yasu; Mok, Philip K. T.

doi:10.1109/iscas.2019.8702699

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Cited by 4 publications

References 8 publications

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High PSR capacitor‐less LDO with adaptive bulk‐driven feedforward technique

Lin,

Chen,

Tang

et al. 2024

Circuit Theory & Apps

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This article presents a capacitor‐less low dropout (LDO) regulator with a high power supply rejection (PSR) for system‐on‐chip (SoC) applications. With the proposed adaptive bulk‐driven feedforward (ABDFF) technique, in which the ripples are injected adaptively to the bulk of power transistor, the LDO maintains a steady PSR enhancement in wide load conditions, and a lower quiescent current and faster load transient response are realized. Post‐layout simulation results show that the proposed LDO regulator achieves −75‐dB PSR at 1 MHz from 1 to 100 mA and 60‐fs figure of merit (FoM) with a 100‐pF load capacitor.

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High PSR capacitor‐less LDO with adaptive bulk‐driven feedforward technique

Lin,

Chen,

Tang

et al. 2024

Circuit Theory & Apps

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High PSR output-capacitor-less LDO with double buffers technique

Zhang

Zeng

et al. 2020

2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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Sub-1 V Output-Capacitor-Less Low-Dropout Regulator with Two Compensation Amplifiers for Enhanced Power Supply Rejection

Hammer

Kempi

Olabode

et al. 2020

2020 IEEE International Symposium on Circuits and Systems (ISCAS)

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A 100 mV, output-capacitorless low-dropout (OCL-LDO) regulator for UHF-RFID System-on-Chip applications is presented in this paper. The regulator utilises a 134nA twostage error amplifier with two high frequency compensation amplifiers to increase the limited PSR of the 10 pF load capacitor. The DC PSR performance is maximized with a feed-forward path in the error amplifier. The circuit is able to provide a maximum load current of 4mA, however a feed-forward PSR mechanism optimises the performance to 1mA load conditions. Due to the added feedback compensation amplifier, the twostage error amplifier does not require additional compensation network.

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Transfer Function Analysis of the Power Supply Rejection Ratio of Capacitor-Less LDOs

Abstract: If it is the author's pre-published version, changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published version.

Cited by 4 publications

References 8 publications

High PSR capacitor‐less LDO with adaptive bulk‐driven feedforward technique

High PSR capacitor‐less LDO with adaptive bulk‐driven feedforward technique

High PSR output-capacitor-less LDO with double buffers technique

Sub-1 V Output-Capacitor-Less Low-Dropout Regulator with Two Compensation Amplifiers for Enhanced Power Supply Rejection

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