Title :
Noise-shaping techniques applied to switched-capacitor voltage regulators
Author :
Rao, Arun ; McIntyre, William ; Moon, Un-Ku ; Temes, Gábor C.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR, USA
Abstract :
A delta-sigma control loop for a buck-boost dc-dc converter with fractional gains is presented. This technique reduces the tones caused by the traditional pulse-frequency modulation regulation. The prototype regulator was fabricated in a 0.72-μm CMOS process and clocked at 1 MHz. It achieved suppression of tones up to 55 dB in the 0-500-kHz range. The input voltage range was 3-5 V. The output voltage ranged from 1.8 to 4 V for load currents up to 150 mA.
Keywords :
CMOS integrated circuits; DC-DC power convertors; delta-sigma modulation; pulse frequency modulation; switched capacitor networks; voltage regulators; 0 to 500 kHz; 0.72 micron; 1 MHz; 1.8 to 4 V; 150 mA; 3 to 5 V; buck-boost dc-dc converter; delta-sigma control loop; fractional gains; noise-shaping techniques; pulse-frequency modulation regulation; switched-capacitor voltage regulators; Batteries; Computer science; Frequency; Moon; Noise shaping; Pulse modulation; Pulse width modulation converters; Regulators; Shape control; Voltage control;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2004.840986
