Title :
On-chip CMOS current-sensing circuit for DC-DC buck converter
Author :
Yuan, Bo ; Lai, Xinmin
Author_Institution :
Inst. of Electron. CAD, Xidian Univ., Xi´an
Abstract :
An on-chip CMOS current-sensing circuit for a DC-DC buck converter is presented. The circuit can measure the inductor current through sensing the voltage of the switch node during the converter on-state. By matching the MOSFETs, the achieved sense ratio is almost independent of temperature, model and supply voltage. The proposed circuit is suitable for low power DC-DC applications with high load current.
Keywords :
CMOS integrated circuits; DC-DC power convertors; electric current measurement; electric sensing devices; inductors; integrated circuit measurement; power MOSFET; DC-DC buck converter; MOSFET; converter on-state; inductor current measurement; on-chip CMOS current-sensing circuit; switch node voltage sensing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20092855
