Title :
An integrated CMOS current-sensing circuit for low-Voltage current-mode buck regulator
Author :
Leung, Chi Yat ; Mok, Philip K T ; Leung, Ka Nang ; Chan, Mansun
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China
fDate :
7/1/2005 12:00:00 AM
Abstract :
An integrated current-sensing circuit for low-voltage buck regulator is presented. The minimum achievable supply voltage of the proposed current-sensing circuit is 1.2 V implemented in a CMOS technology with VTH=0.85 V, and the current-sensing accuracy is higher than 94%. With the developed current-sensing circuit, a buck regulator, which is able to operate at a 1.2-V supply, is implemented. A maximum output current of 120 mA and power-conversion efficiency higher than 89% are achieved.
Keywords :
CMOS integrated circuits; DC-DC power convertors; current-mode circuits; low-power electronics; switched mode power supplies; 0.85 V; 1.2 V; 120 mA; CMOS integrated circuits; dc-dc converter; integrated CMOS current-sensing circuit; low-voltage current mode buck regulator; switched-mode power converter; CMOS technology; Circuit stability; Dynamic voltage scaling; Inductors; Integrated circuit technology; Pulse width modulation; Regulators; Switching converters; Voltage control; Voltage-controlled oscillators; Closed-loop stability; current-mode buck regulator; dc–dc converter; low-voltage current-sensing circuit; on-chip current-sensing circuit; switched-mode power converter;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2005.850403
