TY - GEN
T1 - Design of Current Sensor in COT DC-DC Converter for IoT applications
AU - Ain, Qurat Ul
AU - Khan, Danial
AU - Basim, Muhammad
AU - Lee, Kang Yoon
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/10/21
Y1 - 2020/10/21
N2 - In this paper, a design of a current sensor in COT DC-DC Buck Converter for IoT applications is proposed. In the proposed design, current mirroring technique is used to improve the performance of COT buck DC-DC converter. The proposed structure can operate loop stability steadily according to the output capacitor and can improve the peak power conversion efficiency (PCE). By designing with the above configuration, output voltage ripple characteristics are stabilized when the ESR value of the output capacitor is small. The proposed circuit design results has been checked for the input voltage range of 4 V to 12 V, and the output current is aimed at least 1 A. The proposed circuit is implemented using 0.13 μm CMOS process. The proposed COT buck DC-DC converter used an external inductor of 2.2 uH with DCR resistor of 200 mΩ, VIN = 12 V, output capacitor of 10 μF and RESR is 2mΩ. The load current is verified by changing the output resistor. The PCE is aimed over 90% at load current of 1 A. The light load efficiency achieved for load current of 100 mA is 89.7 % while the peak PCE is 92.5 %.
AB - In this paper, a design of a current sensor in COT DC-DC Buck Converter for IoT applications is proposed. In the proposed design, current mirroring technique is used to improve the performance of COT buck DC-DC converter. The proposed structure can operate loop stability steadily according to the output capacitor and can improve the peak power conversion efficiency (PCE). By designing with the above configuration, output voltage ripple characteristics are stabilized when the ESR value of the output capacitor is small. The proposed circuit design results has been checked for the input voltage range of 4 V to 12 V, and the output current is aimed at least 1 A. The proposed circuit is implemented using 0.13 μm CMOS process. The proposed COT buck DC-DC converter used an external inductor of 2.2 uH with DCR resistor of 200 mΩ, VIN = 12 V, output capacitor of 10 μF and RESR is 2mΩ. The load current is verified by changing the output resistor. The PCE is aimed over 90% at load current of 1 A. The light load efficiency achieved for load current of 100 mA is 89.7 % while the peak PCE is 92.5 %.
KW - Current Sensing
KW - DC-DC Converter
KW - Peak power conversion efficiency
UR - https://www.scopus.com/pages/publications/85100815565
U2 - 10.1109/ISOCC50952.2020.9332937
DO - 10.1109/ISOCC50952.2020.9332937
M3 - Conference contribution
AN - SCOPUS:85100815565
T3 - Proceedings - International SoC Design Conference, ISOCC 2020
SP - 107
EP - 108
BT - Proceedings - International SoC Design Conference, ISOCC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 17th International System-on-Chip Design Conference, ISOCC 2020
Y2 - 21 October 2020 through 24 October 2020
ER -