Full quiescent current enhancement technique for improving transient response on the output-capacitorless Low-Dropout regulator

Chun Hsun Wu; Le-Ren Chang-Chien

doi:10.1109/ISCAS.2012.6271874

Full quiescent current enhancement technique for improving transient response on the output-capacitorless Low-Dropout regulator

Chun Hsun Wu, Le-Ren Chang-Chien

Department of Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

Low-Dropout voltage regulators (LDOs) have been widely used in the mobile electronic devices. Due to the purpose of energy saving, LDOs are preferred to perform fast transient response with low quiescent current as they operate at low supply voltage condition. This paper proposes a full quiescent current boosting circuit (FQCB) that is augmented to the LDO for further accelerating the response during the load transient. Compared to the other dynamic bias approach, the proposed technique raises the quiescent current to the maximum quantity during the load transient for maximizing the dynamic bias effect. The designed LDO was implemented by a 0.35μm CMOS process. Testing results show that the voltage spike is reduced by 65% compared with the LDO without the proposed circuit under the 50mA load change within 300ns. The recovery time is less than 1μs and the stability is guaranteed.

Original language	English
Title of host publication	ISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems
Pages	2733-2736
Number of pages	4
DOIs	https://doi.org/10.1109/ISCAS.2012.6271874
Publication status	Published - 2012
Event	2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 - Seoul, Korea, Republic of Duration: 2012 May 20 → 2012 May 23

Other

Other	2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012
Country/Territory	Korea, Republic of
City	Seoul
Period	12-05-20 → 12-05-23

All Science Journal Classification (ASJC) codes

Hardware and Architecture
Electrical and Electronic Engineering

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10.1109/ISCAS.2012.6271874

Cite this

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title = "Full quiescent current enhancement technique for improving transient response on the output-capacitorless Low-Dropout regulator",

abstract = "Low-Dropout voltage regulators (LDOs) have been widely used in the mobile electronic devices. Due to the purpose of energy saving, LDOs are preferred to perform fast transient response with low quiescent current as they operate at low supply voltage condition. This paper proposes a full quiescent current boosting circuit (FQCB) that is augmented to the LDO for further accelerating the response during the load transient. Compared to the other dynamic bias approach, the proposed technique raises the quiescent current to the maximum quantity during the load transient for maximizing the dynamic bias effect. The designed LDO was implemented by a 0.35μm CMOS process. Testing results show that the voltage spike is reduced by 65% compared with the LDO without the proposed circuit under the 50mA load change within 300ns. The recovery time is less than 1μs and the stability is guaranteed.",

author = "Wu, {Chun Hsun} and Le-Ren Chang-Chien",

year = "2012",

doi = "10.1109/ISCAS.2012.6271874",

language = "English",

pages = "2733--2736",

booktitle = "ISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems",

note = "2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 ; Conference date: 20-05-2012 Through 23-05-2012",

}

Wu, CH & Chang-Chien, L-R 2012, Full quiescent current enhancement technique for improving transient response on the output-capacitorless Low-Dropout regulator. in ISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems., 6271874, pp. 2733-2736, 2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012, Seoul, Korea, Republic of, 12-05-20. https://doi.org/10.1109/ISCAS.2012.6271874

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T1 - Full quiescent current enhancement technique for improving transient response on the output-capacitorless Low-Dropout regulator

AU - Wu, Chun Hsun

AU - Chang-Chien, Le-Ren

PY - 2012

Y1 - 2012

N2 - Low-Dropout voltage regulators (LDOs) have been widely used in the mobile electronic devices. Due to the purpose of energy saving, LDOs are preferred to perform fast transient response with low quiescent current as they operate at low supply voltage condition. This paper proposes a full quiescent current boosting circuit (FQCB) that is augmented to the LDO for further accelerating the response during the load transient. Compared to the other dynamic bias approach, the proposed technique raises the quiescent current to the maximum quantity during the load transient for maximizing the dynamic bias effect. The designed LDO was implemented by a 0.35μm CMOS process. Testing results show that the voltage spike is reduced by 65% compared with the LDO without the proposed circuit under the 50mA load change within 300ns. The recovery time is less than 1μs and the stability is guaranteed.

AB - Low-Dropout voltage regulators (LDOs) have been widely used in the mobile electronic devices. Due to the purpose of energy saving, LDOs are preferred to perform fast transient response with low quiescent current as they operate at low supply voltage condition. This paper proposes a full quiescent current boosting circuit (FQCB) that is augmented to the LDO for further accelerating the response during the load transient. Compared to the other dynamic bias approach, the proposed technique raises the quiescent current to the maximum quantity during the load transient for maximizing the dynamic bias effect. The designed LDO was implemented by a 0.35μm CMOS process. Testing results show that the voltage spike is reduced by 65% compared with the LDO without the proposed circuit under the 50mA load change within 300ns. The recovery time is less than 1μs and the stability is guaranteed.

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M3 - Conference contribution

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BT - ISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems

T2 - 2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012

Y2 - 20 May 2012 through 23 May 2012

ER -

Full quiescent current enhancement technique for improving transient response on the output-capacitorless Low-Dropout regulator

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