A dual-mode 1.8 V-output DC-DC buck converter with on-chip capacitor multiplier in 0.18 um CMOS

Nguyen, Van-Ha; Mo, Yongsea; Song, Wonju; Ji, Sunghyun; Jung, Wonjin; Song, Hanjung

doi:10.1109/icsse.2017.8030977

Cited by 1 publication

(2 citation statements)

References 9 publications

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“…This condition usually leads to a large value for C1, rendering it difficult and/or expensive to integrate [7]. Another design challenge is to maintain the pole and zero defined by (5) in suitable locations, despite inevitable PVT variations.…”

Section: B Gm-rc Frequency Compensation Network Based On the Proposed...mentioning

confidence: 99%

“…An effective way to reduce the die area occupied by the integrated compensation network is to implement the large capacitor required by using a capacitor multiplier. For example, the AO-RC Type-II compensation network presented in [5] is implemented by a floating capacitor multiplier. Reference [6] reports a buck converter with fully integrated compensation network based on a capacitor multiplier; the Gm-RC compensation network implemented by a capacitor multiplier resulted in a fast transient response of the convertor presented in [7].…”

Section: Introductionmentioning

confidence: 99%

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Type-II Compensation for Automotive Buck Converters Implemented by Fully Integrated Capacitor Multiplier

et al. 2022

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This paper presents a solution for full integration of a Type-II compensation circuit for DC-DC buck converters. It employs a novel active circuit based on capacitor multiplier, able to emulate the Rseries-C ensemble within the conventional Gm-RC compensation network. The proposed solution was used to design a current-mode DC-DC buck converter for automotive applications. The implementation of key circuits in a 180 nm CMOS process is presented in some detail. Simulation results demonstrate that the converter meets all design requirements: it provides a 5 V output voltage over wide ranges of the input voltage, 6 V to 45 V, and load current, between 10 mA and 300 mA. Its frequency and transient responses compare well against the performance of a similar converter that employs a conventional Gm-RC compensation circuit. It consumes 20 µA more, but requires significantly less die area, than its counterpart. Furthermore, the tuning required to compensate for process and temperature variations is realized by programming the multiplication factor of the capacitor multiplier.INDEX TERMS Automotive, buck converter, capacitance multiplier, fully integrated DC-DC converter, Type II compensation.

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Section: B Gm-rc Frequency Compensation Network Based On the Proposed...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Type-II Compensation for Automotive Buck Converters Implemented by Fully Integrated Capacitor Multiplier

et al. 2022

View full text Add to dashboard Cite

show abstract

A dual-mode 1.8 V-output DC-DC buck converter with on-chip capacitor multiplier in 0.18 um CMOS

Cited by 1 publication

References 9 publications

Type-II Compensation for Automotive Buck Converters Implemented by Fully Integrated Capacitor Multiplier

Type-II Compensation for Automotive Buck Converters Implemented by Fully Integrated Capacitor Multiplier

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