A 0.6 v input CCM/DCM operating digital buck converter in 40 nm CMOS

Xin Zhang; Po-Hung Chen; Yasuyuki Okuma; Koichi Ishida; Yoshikatsu Ryu; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya

doi:10.1109/JSSC.2014.2339325

A 0.6 v input CCM/DCM operating digital buck converter in 40 nm CMOS

Xin Zhang^*, Po-Hung Chen, Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya

^*Corresponding author for this work

Institute of Electronics

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

62 Scopus citations

Abstract

This paper presents a 0.6 V input, 0.3-0.55 V output buck converter in 40 nm CMOS, for low-voltage low-power wireless sensor network systems. A low power CCM/DCM controller of the buck converter enables automatic selection of DCM or CCM operation depending on load situation, therefore improving the power efficiency. A dual-mode-body-biased (DMBB) zero-crossing detector with both forward body bias mode and zero body bias mode is designed to enable DCM operation with both low supply voltage and normal supply voltage. An ultra-low-power hysteresis voltage detector is proposed for body bias modes selection. The proposed buck converter achieves a peak efficiency of 94% with an output current range of 50 μA to 10 mA. Thanks to the DCM operation, the efficiency at an output current of 10 μA is improved by 20% and 9%, with an output voltage of 0.35 V and 0.5 V, respectively.

Original language	English
Article number	6872611
Pages (from-to)	2377-2386
Number of pages	10
Journal	IEEE Journal of Solid-State Circuits
Volume	49
Issue number	11
DOIs	https://doi.org/10.1109/JSSC.2014.2339325
State	Published - 1 Nov 2014

Keywords

Buck converter
DC-DC converter
forward body bias
low voltage
voltage detector

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10.1109/JSSC.2014.2339325

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title = "A 0.6 v input CCM/DCM operating digital buck converter in 40 nm CMOS",

abstract = "This paper presents a 0.6 V input, 0.3-0.55 V output buck converter in 40 nm CMOS, for low-voltage low-power wireless sensor network systems. A low power CCM/DCM controller of the buck converter enables automatic selection of DCM or CCM operation depending on load situation, therefore improving the power efficiency. A dual-mode-body-biased (DMBB) zero-crossing detector with both forward body bias mode and zero body bias mode is designed to enable DCM operation with both low supply voltage and normal supply voltage. An ultra-low-power hysteresis voltage detector is proposed for body bias modes selection. The proposed buck converter achieves a peak efficiency of 94% with an output current range of 50 μA to 10 mA. Thanks to the DCM operation, the efficiency at an output current of 10 μA is improved by 20% and 9%, with an output voltage of 0.35 V and 0.5 V, respectively.",

keywords = "Buck converter, DC-DC converter, forward body bias, low voltage, voltage detector",

author = "Xin Zhang and Po-Hung Chen and Yasuyuki Okuma and Koichi Ishida and Yoshikatsu Ryu and Kazunori Watanabe and Takayasu Sakurai and Makoto Takamiya",

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doi = "10.1109/JSSC.2014.2339325",

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AU - Chen, Po-Hung

AU - Okuma, Yasuyuki

AU - Ishida, Koichi

AU - Ryu, Yoshikatsu

AU - Watanabe, Kazunori

AU - Sakurai, Takayasu

AU - Takamiya, Makoto

PY - 2014/11/1

Y1 - 2014/11/1

N2 - This paper presents a 0.6 V input, 0.3-0.55 V output buck converter in 40 nm CMOS, for low-voltage low-power wireless sensor network systems. A low power CCM/DCM controller of the buck converter enables automatic selection of DCM or CCM operation depending on load situation, therefore improving the power efficiency. A dual-mode-body-biased (DMBB) zero-crossing detector with both forward body bias mode and zero body bias mode is designed to enable DCM operation with both low supply voltage and normal supply voltage. An ultra-low-power hysteresis voltage detector is proposed for body bias modes selection. The proposed buck converter achieves a peak efficiency of 94% with an output current range of 50 μA to 10 mA. Thanks to the DCM operation, the efficiency at an output current of 10 μA is improved by 20% and 9%, with an output voltage of 0.35 V and 0.5 V, respectively.

AB - This paper presents a 0.6 V input, 0.3-0.55 V output buck converter in 40 nm CMOS, for low-voltage low-power wireless sensor network systems. A low power CCM/DCM controller of the buck converter enables automatic selection of DCM or CCM operation depending on load situation, therefore improving the power efficiency. A dual-mode-body-biased (DMBB) zero-crossing detector with both forward body bias mode and zero body bias mode is designed to enable DCM operation with both low supply voltage and normal supply voltage. An ultra-low-power hysteresis voltage detector is proposed for body bias modes selection. The proposed buck converter achieves a peak efficiency of 94% with an output current range of 50 μA to 10 mA. Thanks to the DCM operation, the efficiency at an output current of 10 μA is improved by 20% and 9%, with an output voltage of 0.35 V and 0.5 V, respectively.

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A 0.6 v input CCM/DCM operating digital buck converter in 40 nm CMOS

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Keywords

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