A High-Efficiency Fast Transient COT Control DC-DC Buck Converter with Current Reused Current Sensor

Qurat Ul Ain; Danial Khan; Byeong Gi Jang; Muhammad Basim; Khuram Shehzad; Muhammad Asif; Deeksha Verma; Imran Ali; Young Gun Pu; Keum Cheol Hwang; Youngoo Yang; Kang Yoon Lee

doi:10.1109/TPEL.2021.3052198

A High-Efficiency Fast Transient COT Control DC-DC Buck Converter with Current Reused Current Sensor

Qurat Ul Ain, Danial Khan, Byeong Gi Jang, Muhammad Basim, Khuram Shehzad, Muhammad Asif, Deeksha Verma, Imran Ali, Young Gun Pu, Keum Cheol Hwang, Youngoo Yang, Kang Yoon Lee

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

This article presents a high-efficiency fast transient constant on-time (COT) control dc-dc buck converter for the Internet of Things applications. The current reused current sensor is proposed to enhance the loop stability and improve the power conversion efficiency at light load. Input current is sensed and added to the feedback voltage of the dc-dc converter to increase the sensed output ripple voltage. Fast transient dc-offset cancelation technique is introduced to achieve a fast transient recovery time and to cancel the output dc offset. This chip is fabricated with a 0.13-μm CMOS process. A standard supply voltage of 7-15 V is applied to produce the output voltage of 5-5.33 V. The total die area is 2 mm × 1.5 mm. The settling time is 17 μs. The transient recovery time from light to heavy load and from heavy load to light load are 3 μs and 2.7 μs, respectively, with a maximum dc offset of 3.5 mV. The overshoot voltage is 85 mV and the undershoot voltage is 72 mV. The peak efficiency of the proposed design is 95.56% at 0.5 A and efficiency at the light load of 10 mA is 84.60%.

Original language	English (US)
Pages (from-to)	9521-9535
Number of pages	15
Journal	IEEE Transactions on Power Electronics
Volume	36
Issue number	8
DOIs	https://doi.org/10.1109/TPEL.2021.3052198
State	Published - Aug 1 2021
Externally published	Yes

Access to Document

10.1109/TPEL.2021.3052198

Cite this

@article{ab5e65090b1a44d18c6fd11fb7972ba9,

title = "A High-Efficiency Fast Transient COT Control DC-DC Buck Converter with Current Reused Current Sensor",

abstract = "This article presents a high-efficiency fast transient constant on-time (COT) control dc-dc buck converter for the Internet of Things applications. The current reused current sensor is proposed to enhance the loop stability and improve the power conversion efficiency at light load. Input current is sensed and added to the feedback voltage of the dc-dc converter to increase the sensed output ripple voltage. Fast transient dc-offset cancelation technique is introduced to achieve a fast transient recovery time and to cancel the output dc offset. This chip is fabricated with a 0.13-μm CMOS process. A standard supply voltage of 7-15 V is applied to produce the output voltage of 5-5.33 V. The total die area is 2 mm × 1.5 mm. The settling time is 17 μs. The transient recovery time from light to heavy load and from heavy load to light load are 3 μs and 2.7 μs, respectively, with a maximum dc offset of 3.5 mV. The overshoot voltage is 85 mV and the undershoot voltage is 72 mV. The peak efficiency of the proposed design is 95.56% at 0.5 A and efficiency at the light load of 10 mA is 84.60%.",

author = "{Ul Ain}, Qurat and Danial Khan and Jang, {Byeong Gi} and Muhammad Basim and Khuram Shehzad and Muhammad Asif and Deeksha Verma and Imran Ali and Pu, {Young Gun} and Hwang, {Keum Cheol} and Youngoo Yang and Lee, {Kang Yoon}",

note = "Generated from Scopus record by KAUST IRTS on 2023-09-23",

year = "2021",

month = aug,

day = "1",

doi = "10.1109/TPEL.2021.3052198",

language = "English (US)",

volume = "36",

pages = "9521--9535",

journal = "IEEE Transactions on Power Electronics",

issn = "1941-0107",

publisher = "Institute of Electrical and Electronics Engineers",

number = "8",

}

TY - JOUR

T1 - A High-Efficiency Fast Transient COT Control DC-DC Buck Converter with Current Reused Current Sensor

AU - Ul Ain, Qurat

AU - Khan, Danial

AU - Jang, Byeong Gi

AU - Basim, Muhammad

AU - Shehzad, Khuram

AU - Asif, Muhammad

AU - Verma, Deeksha

AU - Ali, Imran

AU - Pu, Young Gun

AU - Hwang, Keum Cheol

AU - Yang, Youngoo

AU - Lee, Kang Yoon

N1 - Generated from Scopus record by KAUST IRTS on 2023-09-23

PY - 2021/8/1

Y1 - 2021/8/1

N2 - This article presents a high-efficiency fast transient constant on-time (COT) control dc-dc buck converter for the Internet of Things applications. The current reused current sensor is proposed to enhance the loop stability and improve the power conversion efficiency at light load. Input current is sensed and added to the feedback voltage of the dc-dc converter to increase the sensed output ripple voltage. Fast transient dc-offset cancelation technique is introduced to achieve a fast transient recovery time and to cancel the output dc offset. This chip is fabricated with a 0.13-μm CMOS process. A standard supply voltage of 7-15 V is applied to produce the output voltage of 5-5.33 V. The total die area is 2 mm × 1.5 mm. The settling time is 17 μs. The transient recovery time from light to heavy load and from heavy load to light load are 3 μs and 2.7 μs, respectively, with a maximum dc offset of 3.5 mV. The overshoot voltage is 85 mV and the undershoot voltage is 72 mV. The peak efficiency of the proposed design is 95.56% at 0.5 A and efficiency at the light load of 10 mA is 84.60%.

AB - This article presents a high-efficiency fast transient constant on-time (COT) control dc-dc buck converter for the Internet of Things applications. The current reused current sensor is proposed to enhance the loop stability and improve the power conversion efficiency at light load. Input current is sensed and added to the feedback voltage of the dc-dc converter to increase the sensed output ripple voltage. Fast transient dc-offset cancelation technique is introduced to achieve a fast transient recovery time and to cancel the output dc offset. This chip is fabricated with a 0.13-μm CMOS process. A standard supply voltage of 7-15 V is applied to produce the output voltage of 5-5.33 V. The total die area is 2 mm × 1.5 mm. The settling time is 17 μs. The transient recovery time from light to heavy load and from heavy load to light load are 3 μs and 2.7 μs, respectively, with a maximum dc offset of 3.5 mV. The overshoot voltage is 85 mV and the undershoot voltage is 72 mV. The peak efficiency of the proposed design is 95.56% at 0.5 A and efficiency at the light load of 10 mA is 84.60%.

UR - https://ieeexplore.ieee.org/document/9325931/

UR - http://www.scopus.com/inward/record.url?scp=85099723388&partnerID=8YFLogxK

U2 - 10.1109/TPEL.2021.3052198

DO - 10.1109/TPEL.2021.3052198

M3 - Article

SN - 1941-0107

VL - 36

SP - 9521

EP - 9535

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 8

ER -

A High-Efficiency Fast Transient COT Control DC-DC Buck Converter with Current Reused Current Sensor

Abstract

Access to Document

Other files and links

Fingerprint

Cite this