Title :
A 300mA 14mV-ripple digitally controlled buck converter using frequency domain ΔΣ ADC and hybrid PWM generator
Author :
Ahmad, H.H. ; Bakkaloglu, Bertan
Author_Institution :
Arizona State Univ., Tempe, AZ, USA
Abstract :
A 0.18 μm CMOS digitally controlled DC-DC buck converter is presented. An all-digital 8 b frequency-domain ΔΣ ADC is used for the feedback path, and a 9 b segmented digital PWM is used for power stage control. A regulated output voltage accuracy of 1% and maximum efficiency of 94% is achieved with less than 14 mVpp ripple and a settling time of 100 μs for a 300 mA load transient.
Keywords :
CMOS integrated circuits; DC-DC power convertors; PWM power convertors; analogue-digital conversion; delta-sigma modulation; digital control; power control; CMOS integrated circuit; DC-DC buck converter; current 300 mA; digital control; frequency domain delta-sigma ADC; hybrid PWM generator; power stage control; size 0.18 μm; time 100 mus; voltage 14 mV; Buck converters; DC-DC power converters; Delay; Digital control; Frequency domain analysis; Frequency modulation; Hybrid power systems; Pulse width modulation; Pulse width modulation converters; Voltage;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2010 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-6033-5
DOI :
10.1109/ISSCC.2010.5433985
