A Low-noise Low-Dropout Regulator Using a 28-nm Technology

IEEE International Conference on Electronics, Circuits and Systems (ICECS), pp. 1–4

Abstract

This paper presents a low-dropout regulator (LDO) with the capability to provide a stable 0.9 V supply voltage for fluctuation-sensitive circuits such as the voltage-controller oscillator in a frequency synthesizer. The LDO uses a low noise architecture that separates two feed-back loops with a low-pass filter with a extremely low 3-dB frequency of 8.15 Hz. The circuit is designed in a 28-nm technology, operating with a 1.8 V external voltage and able to supply maximum current of 25 mA. Analysis and implementation for optimizing power supply rejection ratio (PSRR) of the circuit are also addressed in this paper.

Authors 5

1. Lantao Wang Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

2. Markus Scholl Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

3. Jonas Meier Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

4. Ralf Wunderlich Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

5. Stefan J. Heinen Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany