Analysis and modelling of buck converters output spectrum in CCM with PWM control

Author

Chengwu Tao ; Fayed, Ayman

Author_Institution

Electr. & Comput. Eng. Dept., Iowa State Univ., Ames, IA, USA

fYear

2011

fDate

7-10 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

Simple and handy formulas for describing the spectrum of switching noise at the output of buck converters in CCM with resistive loads are derived. The formulas can be used by analog/RF designers to predict and account for power supply noise early in the design process. The results of those theoretical formulas are compared to the simulation results using verilog-A macro models, and further verified by measuring the noise spectrum of a standard on-the-shelf buck converter commonly used for large mixed-signal SoCs.

Keywords

PWM power convertors; integrated circuit design; integrated circuit modelling; mixed analogue-digital integrated circuits; power supply circuits; switching convertors; system-on-chip; CCM; PWM control; analog-RF designers; buck converters output spectrum; design process; mixed-signal SoC; noise spectrum; power supply noise; standard on-the-shelf buck converter; switching noise; verilog-A macro models; Digital signal processing; Noise measurement; Switches; US Department of Energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on

Conference_Location

Seoul

ISSN

1548-3746

Print_ISBN

978-1-61284-856-3

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2011.6026363

Filename

6026363