A Wide-Load-Range and Full-Spectrum Power Supply Rejection LDO for Wideband RF Transceiver Systems
This paper proposes a wide-load-range low-dropout regulator (LDO) using a rail-to-rail CLASS-AB CMOS buffer. This buffer enables the output-pole-dominant (OPD) LDO to support a broad load current range (ILOAD) from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$100 \mu ~\mathrm{A}$</tex> to 300 mA, while maintaining a phase margin (PM) above 60° and a power-supply rejection (PSR) better than −26 dB at 100 MHz. Over an input voltage range of 1.2 V to 1.4 V, the proposed LDO can always achieve excellent PSR at low frequencies. Additionally, the LDO minimizes undershoot and overshoot to below 10 mV.
Authors
- Fei Lou (ORCID: https://orcid.org/0000-0002-9561-8860)
- Xiaodong Zhao (ORCID: https://orcid.org/0000-0002-8344-9852)
- Lin Cheng (ORCID: https://orcid.org/0000-0002-3285-0187)
- Xun Liu (ORCID: https://orcid.org/0000-0002-6115-8886)
Institutions
- University of Science and Technology of China (CN)
- Chinese University of Hong Kong, Shenzhen (CN)
Publication Details
- Published
- 2025-05-23
- DOI
- https://doi.org/10.1109/iwrfat65352.2025.11103388
- Primary Topic
- Radio Frequency Integrated Circuit Design
- Type
- article
- Field-Weighted Citation Impact
- 0.00