An Output Capacitor-Less Low-Dropout Regulator with a Low-VDD Inverting Buffer for the Mobile Application
- Authors
- Park, Jieun; Lee, Byunghun; Hong, Sung-Wan
- Issue Date
- Oct-2020
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Buffer; capacitorless; low-dropout regulator (LDO); low-V $_DD$ structure; power supply rejection ratio (PSRR)
- Citation
- IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.67, no.10, pp.8931 - 8935
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
- Volume
- 67
- Number
- 10
- Start Page
- 8931
- End Page
- 8935
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/144909
- DOI
- 10.1109/TIE.2019.2951296
- ISSN
- 0278-0046
- Abstract
- To provide power to the latest mobile applications that use functions with heavy loads, in this letter, we present a capacitorless low-dropout regulator (LDO) that supplies a large load current up to 600 mA. The proposed buffer and the feedforward paths are used to provide a stable operation and fast response along with a large load current. Owing to these schemes, the proposed LDO has a high unity gain frequency of 2.85 MHz at 100 mA with a total compensation capacitance of 5.1 pF. In addition, the LDO operates under a wide input voltage range of 1.5-5.0 V owing to the low-VDD structure. Also, a power supply rejection ratio was -52 dB at 100 kHz. The chip was implemented with a small size of 0.082 mm 2 using the I/O devices of a 0.18 μm CMOS process with a minimum length of 0.5 μm.
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