A Fully Integrated Recursive Switched-Capacitor DC-DC Converter with Hybrid Hysteresis-CFM Control

Shuangmu Li; Tianqi Lu; Junmin Jiang; Sijun Du

doi:10.1109/ESSERC62670.2024.10719469

A Fully Integrated Recursive Switched-Capacitor DC-DC Converter with Hybrid Hysteresis-CFM Control

Shuangmu Li^*, Tianqi Lu, Junmin Jiang, Sijun Du

^*Corresponding author for this work

Electronic Instrumentation

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

This work presents a switched capacitor power converter (SCPC) with instant transient response and minimized steady-state output ripple. The proposed SCPC employs a hybrid control strategy that amalgamates the strengths of hysteresis and continuous frequency modulation (CFM) controls, thus elevating transient performance while maintaining a small steady-state ripple. The system adopts a 10 -phase interleaved recursive switched capacitor (RSC) topology with adaptive capacitor sizing to achieve configurable voltage-conversion ratios (VCR) with heightened efficiency, power density, and load ability. Additionally, a novel adaptive switch-sizing technique is introduced to improve light-load efficiency. Fabricated in 180-nm BCD technology, the chip supports a wide-range load current of 0.7mA-120mA and converts a 0.8 -to-3.6V input to a 0.25 -to2.4 V output with a peak efficiency of 87.1%. The proposed converter simultaneously achieves a low voltage ripple of 12 mV and an over-/under-shoot voltage of less than 50 mV even under significant load transient steps (171X).

Original language	English
Title of host publication	ESSERC 2024 - Proceedings
Subtitle of host publication	50th IEEE European Solid-State Electronics Research Conference
Publisher	IEEE
Pages	57-60
Number of pages	4
ISBN (Electronic)	9798350388138
DOIs	https://doi.org/10.1109/ESSERC62670.2024.10719469
Publication status	Published - 2024
Event	50th IEEE European Solid-State Electronics Research Conference, ESSERC 2024 - Bruges, Belgium Duration: 9 Sept 2024 → 12 Sept 2024

Publication series

Name	European Solid-State Circuits Conference
ISSN (Print)	1930-8833

Conference

Conference	50th IEEE European Solid-State Electronics Research Conference, ESSERC 2024
Country/Territory	Belgium
City	Bruges
Period	9/09/24 → 12/09/24

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

continuous frequency modulation (CFM)
hybrid control
hysteresis control
Switched capacitor

Access to Document

10.1109/ESSERC62670.2024.10719469

Cite this

@inproceedings{b23811f43ac746248f8ca9f6704b2759,

title = "A Fully Integrated Recursive Switched-Capacitor DC-DC Converter with Hybrid Hysteresis-CFM Control",

abstract = "This work presents a switched capacitor power converter (SCPC) with instant transient response and minimized steady-state output ripple. The proposed SCPC employs a hybrid control strategy that amalgamates the strengths of hysteresis and continuous frequency modulation (CFM) controls, thus elevating transient performance while maintaining a small steady-state ripple. The system adopts a 10 -phase interleaved recursive switched capacitor (RSC) topology with adaptive capacitor sizing to achieve configurable voltage-conversion ratios (VCR) with heightened efficiency, power density, and load ability. Additionally, a novel adaptive switch-sizing technique is introduced to improve light-load efficiency. Fabricated in 180-nm BCD technology, the chip supports a wide-range load current of 0.7mA-120mA and converts a 0.8 -to-3.6V input to a 0.25 -to2.4 V output with a peak efficiency of 87.1%. The proposed converter simultaneously achieves a low voltage ripple of 12 mV and an over-/under-shoot voltage of less than 50 mV even under significant load transient steps (171X).",

keywords = "continuous frequency modulation (CFM), hybrid control, hysteresis control, Switched capacitor",

author = "Shuangmu Li and Tianqi Lu and Junmin Jiang and Sijun Du",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ; 50th IEEE European Solid-State Electronics Research Conference, ESSERC 2024 ; Conference date: 09-09-2024 Through 12-09-2024",

year = "2024",

doi = "10.1109/ESSERC62670.2024.10719469",

language = "English",

series = "European Solid-State Circuits Conference",

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Li, S, Lu, T, Jiang, J & Du, S 2024, A Fully Integrated Recursive Switched-Capacitor DC-DC Converter with Hybrid Hysteresis-CFM Control. in ESSERC 2024 - Proceedings: 50th IEEE European Solid-State Electronics Research Conference. European Solid-State Circuits Conference, IEEE, pp. 57-60, 50th IEEE European Solid-State Electronics Research Conference, ESSERC 2024, Bruges, Belgium, 9/09/24. https://doi.org/10.1109/ESSERC62670.2024.10719469

A Fully Integrated Recursive Switched-Capacitor DC-DC Converter with Hybrid Hysteresis-CFM Control. / Li, Shuangmu; Lu, Tianqi; Jiang, Junmin et al.
ESSERC 2024 - Proceedings: 50th IEEE European Solid-State Electronics Research Conference. IEEE, 2024. p. 57-60 (European Solid-State Circuits Conference).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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AU - Jiang, Junmin

AU - Du, Sijun

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2024

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N2 - This work presents a switched capacitor power converter (SCPC) with instant transient response and minimized steady-state output ripple. The proposed SCPC employs a hybrid control strategy that amalgamates the strengths of hysteresis and continuous frequency modulation (CFM) controls, thus elevating transient performance while maintaining a small steady-state ripple. The system adopts a 10 -phase interleaved recursive switched capacitor (RSC) topology with adaptive capacitor sizing to achieve configurable voltage-conversion ratios (VCR) with heightened efficiency, power density, and load ability. Additionally, a novel adaptive switch-sizing technique is introduced to improve light-load efficiency. Fabricated in 180-nm BCD technology, the chip supports a wide-range load current of 0.7mA-120mA and converts a 0.8 -to-3.6V input to a 0.25 -to2.4 V output with a peak efficiency of 87.1%. The proposed converter simultaneously achieves a low voltage ripple of 12 mV and an over-/under-shoot voltage of less than 50 mV even under significant load transient steps (171X).

AB - This work presents a switched capacitor power converter (SCPC) with instant transient response and minimized steady-state output ripple. The proposed SCPC employs a hybrid control strategy that amalgamates the strengths of hysteresis and continuous frequency modulation (CFM) controls, thus elevating transient performance while maintaining a small steady-state ripple. The system adopts a 10 -phase interleaved recursive switched capacitor (RSC) topology with adaptive capacitor sizing to achieve configurable voltage-conversion ratios (VCR) with heightened efficiency, power density, and load ability. Additionally, a novel adaptive switch-sizing technique is introduced to improve light-load efficiency. Fabricated in 180-nm BCD technology, the chip supports a wide-range load current of 0.7mA-120mA and converts a 0.8 -to-3.6V input to a 0.25 -to2.4 V output with a peak efficiency of 87.1%. The proposed converter simultaneously achieves a low voltage ripple of 12 mV and an over-/under-shoot voltage of less than 50 mV even under significant load transient steps (171X).

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KW - hybrid control

KW - hysteresis control

KW - Switched capacitor

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M3 - Conference contribution

AN - SCOPUS:85208414781

T3 - European Solid-State Circuits Conference

SP - 57

EP - 60

BT - ESSERC 2024 - Proceedings

PB - IEEE

T2 - 50th IEEE European Solid-State Electronics Research Conference, ESSERC 2024

Y2 - 9 September 2024 through 12 September 2024

ER -

A Fully Integrated Recursive Switched-Capacitor DC-DC Converter with Hybrid Hysteresis-CFM Control

Abstract

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