A low dropout, CMOS regulator with high PSR over wideband frequencies

Author

Gupta, Vishal ; Rincón-Mora, Gabriel A.

Author_Institution

Georgia Tech Analog & Power IC Design Lab., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

2005

fDate

23-26 May 2005

Firstpage

4245

Abstract

Modern system-on-chip (SoC) environments are swamped in high frequency noise that is generated by RF and digital circuits and propagated onto supply rails through capacitive coupling. In these systems, linear regulators are used to shield noise-sensitive analog blocks from high frequency fluctuations in the power supply. The paper presents a low dropout regulator that achieves power supply rejection (PSR) better than -40 dB over the entire frequency spectrum. The system has an output voltage of 1.0 V and a maximum current capability of 10 mA. It consists of operational amplifiers (op amps), a bandgap reference, a clock generator, and a charge pump and has been designed and simulated using BSIM3 models of a 0.5 μm CMOS process obtained from MOSIS.

Keywords

CMOS analogue integrated circuits; integrated circuit design; integrated circuit noise; operational amplifiers; random noise; system-on-chip; voltage multipliers; voltage regulators; 0.5 micron; 1.0 V; 10 mA; CMOS regulator; RF circuits; SoC; bandgap reference; capacitive coupling; charge pump; clock generator; current capability; digital circuits; high frequency noise; linear regulators; low dropout regulator; noise-sensitive analog blocks; op amps; operational amplifiers; output voltage; power supply rejection; supply rails; system-on-chip; wideband frequencies; Circuit noise; Digital circuits; Noise generators; Operational amplifiers; Power supplies; Radio frequency; Regulators; System-on-a-chip; Wideband; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1465568

Filename

1465568