A Capacitor-less Low Dropout Regulator with Fast Response

Xingyuan TONG; Mao LI; Siwan DONG

doi:10.11999/JEIT181060

Volume 41 Issue 11

Nov. 2019

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Xingyuan TONG, Mao LI, Siwan DONG. A Capacitor-less Low Dropout Regulator with Fast Response[J]. Journal of Electronics & Information Technology, 2019, 41(11): 2592-2598. doi: 10.11999/JEIT181060

Citation:

Xingyuan TONG, Mao LI, Siwan DONG. A Capacitor-less Low Dropout Regulator with Fast Response[J]. Journal of Electronics & Information Technology, 2019, 41(11): 2592-2598. doi: 10.11999/JEIT181060

Xingyuan TONG, Mao LI, Siwan DONG. A Capacitor-less Low Dropout Regulator with Fast Response[J]. Journal of Electronics & Information Technology, 2019, 41(11): 2592-2598. doi: 10.11999/JEIT181060

Citation:

Xingyuan TONG, Mao LI, Siwan DONG. A Capacitor-less Low Dropout Regulator with Fast Response[J]. Journal of Electronics & Information Technology, 2019, 41(11): 2592-2598. doi: 10.11999/JEIT181060

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A Capacitor-less Low Dropout Regulator with Fast Response

doi: 10.11999/JEIT181060

School of Electronics Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China

Funds: The National Natural Science Foundation of China (61674122, 61804124), Shaanxi Innovation Talents Promotion Plan(2017KJXX-46), Shaanxi Provincial High-level Talents Special Support Plan (2018-36)

Received Date: 2018-11-20
Rev Recd Date: 2019-03-07

Available Online: 2019-04-10

Publish Date: 2019-11-01

Abstract

Abstract

A novel technique for increasing the load response speed of Capacitor-Less Low-DropOut linear regulator (CL-LDO) is proposed to improve the transient response of CL-LDO when its load current changes. With an additional fast signal feedback path, the CL-LDO can achieve fast transient response so that the overshoot and undershoot of its output voltage can be dramatically reduced. A CL-LDO with fast response is realized in 0.18 μm CMOS and occupies an active area of 0.00529 mm². The CL-LDO has an output voltage of 1.194 V when the input supply voltage ranges from 1.5 V to 2.5 V. When the load current changes from 100 μA to 10 mA with the rise and fall time of 1 μs, the output of LDO can be recovered from its overshoot and undershoot to a stable voltage within 489.537 ns and 960.918 ns, respectively. Compared with a traditional CL-LDO without this proposed technique, the transient response speed of this CL-LDO is increased by 7.41 times. The overshoot and undershoot of the output voltage is decreased by 35.3% and 78.1%, respectively.
- Low-DropOut (LDO) regulator,
- Capacitor-less,
- Fast transient response,
- Small area

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References(16)

References

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