Title :
A 20 MHz 200-500 mA Monolithic Buck Converter for RF Applications
Author :
Hannon, Jason ; Foley, Raymond ; Griffiths, James ; O´Sullivan, Dara ; McCarthy, Kevin G. ; Egan, Michael G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. Coll. Cork, Cork
Abstract :
In an RF system power amplifiers (PAs) typically consume the most power. This paper presents a buck converter design optimised for a wideband code division multiple access (WCDMA) PA. The design approach taken focuses on the optimization of switch sizing based on the overall power losses of the system including the output inductor losses. The converter is optimised for 20 MHz switching and output currents in the range of 200-500 mA. Experimented results are presented on the fabricated converter, with a maximum measured efficiency of 82%.
Keywords :
broadband networks; code division multiple access; power amplifiers; power convertors; radiofrequency amplifiers; RF applications; RF system power amplifiers; current 200 mA to 500 mA; frequency 20 MHz; monolithic buck converter; switch sizing; wideband code division multiple access PA; Broadband amplifiers; Buck converters; Design optimization; Inductors; Multiaccess communication; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Switches; Wideband;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802705
