Title :
A spurious-free switching buck converter using a delta-sigma modulation controller with a scalable sampling frequency
Author :
Alghamdi, Mohammad K. ; Hamoui, Anas A.
Author_Institution :
McGill Univ., Montreal, QC, Canada
Abstract :
This switching DC-DC buck converter uses a ΔΣ-modulator controller with a scalable sampling frequency, in order to eliminate the spurs and minimize the noise floor at its output without sacrificing the power efficiency. Fabricated in 0.13-μm digital CMOS, it achieves a spurious-free output with voltage ripples below 70mV over its full loading range (2mA to 800mA). Furthermore, its power efficiency is higher than 72% over this range, with 96% peak efficiency.
Keywords :
CMOS digital integrated circuits; DC-DC power convertors; delta-sigma modulation; DC-DC buck converter; current 2 mA to 800 mA; delta-sigma modulation controller; digital CMOS; scalable sampling frequency; size 0.13 mum; spurious-free output; switching DC-DC buck converter; CMOS integrated circuits; CMOS technology; Control systems; Frequency control; Frequency conversion; Frequency modulation;
Conference_Titel :
VLSI Circuits (VLSIC), 2011 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-61284-175-5
