Title :
A 1-V integrated current-mode boost converter in standard 3.3/5-V CMOS technologies
Author :
Leung, Chi Yat ; Mok, Philip K T ; Leung, Ka Nang
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China
Abstract :
A 1-V integrated CMOS current-mode boost converter implemented in a standard 3.3/5-V 0.6-μm CMOS technology (VTH≈0.85 V), providing power-conversion efficiency of higher than 85% at 100-mA output current, is presented in this paper. The high-performance boost converter is successfully developed due to three proposed low-voltage circuit structures, including an inductor-current sensing circuit for current-mode operation with accuracy of higher than 94%, a precision V-I converter for compensation-ramp generation in current-mode control, and a VCO providing supply-independent clock and ramp signals. Moreover, a proposed startup circuit enables proper converter startup within a sub-1-V supply condition.
Keywords :
CMOS integrated circuits; current-mode circuits; low-power electronics; power convertors; voltage-controlled oscillators; 0.6 micron; 0.85 V; 1 V; 100 mA; 3.3 V; 5 V; CMOS technology; compensation-ramp generation; current-mode control; current-mode operation; inductor-current sensing circuit; integrated current-mode boost converter; low-voltage circuit; startup circuit; voltage controlled oscillator; Batteries; CMOS technology; Integrated circuit technology; Low voltage; Pulse width modulation; Switches; System-on-a-chip; Threshold voltage; Voltage control; Voltage-controlled oscillators; Boost converter; current-mode control; current-sensing circuit; startup circuit;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2005.857374
