Title :
An Efficient Adaptive Digital DC-DC Converter with Dual Loop Controls for Fast Dynamic Voltage Scaling
Author :
Song, Janghoon ; Yoon, Gilwon ; Kim, Chulwoo
Author_Institution :
Dept. of Electron. & Comput. Eng., Korea Univ., Seoul
Abstract :
A fast adaptive digital DC-DC converter for dynamic voltage scaling is presented. The control loop employs coarse and fine controls for each power transistor to enhance output response time and to reduce the conduction loss. The device was fabricated using a 0.18-mum CMOS process, occupying an area of 0.35mm2. The output voltage can vary from 0.76V to 1.75V, with a resolution of 28mV/step and a tracking time of 6.4 mus/V. Maximum efficiency of 94.8% is achieved with good load regulation
Keywords :
CMOS integrated circuits; DC-DC power convertors; adaptive control; digital control; power aware computing; power transistors; semiconductor device manufacture; 0.18 micron; 0.76 to 1.75 V; CMOS process; adaptive digital DC-DC converter; coarse control; conduction loss; control loop; dual loop controls; dynamic voltage scaling; fine control; output response time; power transistor; Adaptive control; Clocks; DC-DC power converters; Delay; Dynamic voltage scaling; Programmable control; Pulse width modulation; Pulse width modulation converters; Switching converters; Voltage control;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.321006
