An output capacitorless low-dropout regulator with a Low-VDDinverting buffer for the mobile application

Jieun Park, Byunghun Lee, Sung Wan Hong

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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 mm2 using the I/O devices of a 0.18 μm CMOS process with a minimum length of 0.5 μm.

Original languageEnglish
Article number8894689
Pages (from-to)8931-8935
Number of pages5
JournalIEEE Transactions on Industrial Electronics
Volume67
Issue number10
DOIs
StatePublished - 2020 Oct

Keywords

  • Buffer
  • capacitorless
  • low-Vstructure
  • low-dropout regulator (LDO)
  • power supply rejection ratio (PSRR)

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