DocumentCode
439784
Title
A noise-shaped switched-capacitor DC-DC voltage regulator
Author
Rao, A. ; McIntyre, W. ; Moon, U. ; Temes, G.
Author_Institution
Oregon State University, Corvallis, Oregon
fYear
2002
fDate
24-26 Sept. 2002
Firstpage
375
Lastpage
378
Abstract
This paper presents a delta-sigma control loop for a buck-boost dc-dc converter with fractional gains. The charge pump used to convert the input voltage acts as a D/A converter in the loop, and its output ripple is frequency shaped by the loop, which also provides the pulse-frequency modulation needed for the conversion. A test chip realised in a 0.72-µm CMOS process and clocked at 1MHz provided suppression of tones up to 50dB in the 0-500kHz range. The target output voltage may be from 1.8V to 4V for loads up to 150mA. The input voltage range is 3V to 5V.
Keywords
1f noise; Charge pumps; DC-DC power converters; Frequency conversion; Noise shaping; Pulse modulation; Pulse shaping methods; Pulse width modulation converters; Regulators; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference, 2002. ESSCIRC 2002. Proceedings of the 28th European
Conference_Location
Florence, Italy
Type
conf
Filename
1471543
Link To Document