A Noise-Shaped Switched-Capacitor DC-DC Voltage Regulator
نویسندگان
چکیده
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 pulsefrequency 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.
منابع مشابه
13th Int'l Symposium on Quality Electronic Design
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