12.4 A 10mW fully integrated 2-to-13V-input buck-boost SC converter with 81.5% peak efficiency

Lutz, Daniel; Renz, Peter; Wicht, Bernhard

doi:10.1109/isscc.2016.7417988

Cited by 31 publications

(5 citation statements)

References 4 publications

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“…However, affected by the simultaneously increased conduction and parasitic losses, the achieved power density is generally lower as the number of VCRs increases. The existing fine‐grained VCR SC converters, majorly based on either the binary or the customized topologies, suffer from suboptimal power stage losses as well as a limited power density at sub‐mW/mm 2 due also to the limited capacity density of on‐chip MIM and metal‐oxide‐metal (MOM) capacitors 76–79 . Even though using the MOS capacitor can improve the situation, the increased parasitic loss will significantly degrade the overall efficiency.…”

Section: Integrated Power Convertersmentioning

confidence: 99%

“…The existing fine-grained VCR SC converters, majorly based on either the binary or the customized topologies, suffer from suboptimal power stage losses as well as a limited power density at sub-mW/mm 2 due also to the limited capacity density of on-chip MIM and metal-oxide-metal (MOM) capacitors. [76][77][78][79] Even though using the MOS capacitor can improve the situation, the increased parasitic loss will significantly degrade the overall efficiency. In addition to the topology design, on-chip power components' utilization and switch driving are also essential design considerations.…”

Section: Sc Convertersmentioning

confidence: 99%

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Bird's‐eye view of analog and mixed‐signal chips for the 21st century

Martins

Mak

Chan

et al. 2021

Circuit Theory & Apps

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SUMMARY The Internet of Everything (IoE), clearly a 21st century's technology, brilliantly plays with digital data obtained from analog sources, bringing together two different realities, the analog (physical/real), and the digital (cyber/virtual) worlds. Then, with the boundaries of IoE still analog in nature, the required functions at the interface involve sensing, measuring, filtering, converting, processing, and connecting, which imply that the analog layer governs the entire system in terms of accuracy and precision. Furthermore, such interface integrates several analog and mixed‐signal subsystems that comprise mainly signal transmission and reception, frequency generation, energy harvesting, data, and power conversion. This paper sets forth a state‐of‐the‐art design perspective of some of the most critical building blocks used in the analog/digital interface, covering wireless cellular transceivers, millimeter‐wave frequency generators, energy harvesting interfaces, plus, data and power converters, that exhibit high quality performance achieved through low‐power consumption, high energy‐efficiency, and high speed.

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Section: Integrated Power Convertersmentioning

confidence: 99%

Section: Sc Convertersmentioning

confidence: 99%

Bird's‐eye view of analog and mixed‐signal chips for the 21st century

Martins

Mak

Chan

et al. 2021

Circuit Theory & Apps

View full text Add to dashboard Cite

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“…Solving (3)(4)(6), the relation of 1 and 2 can be obtained in (7). To achieve the same performance in effective time, the counter-based scheme should have smaller clock period.…”

Section: Counter-based Solution With Precise and Adjustable Non-overlmentioning

confidence: 99%

“…With the benefits of high integration, fast transient response, high current drivability and good flexibility, charge pumps are gaining interests from designers of display driver integrated circuits (ICs), flash memory and smart sensors [1][2][3]. To widen the range of input voltage and output voltage and then improve the total efficiency, more voltage conversion ratios (VCRs) are required while high integration needs be kept [4][5][6][7]. Thus, multi-phase charge pumps are superior since they have achieved efficient utilization of each off-chip capacitor [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

P‐58: Efficiency Enhancement by Non‐Overlapping Time Design and Adaptive Ratio Control for Charge Pump of Display Drivers

Zhang

Zeng

Lin

et al. 2019

Symp Digest of Tech Papers

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In this paper, a high-efficiency solution to multi-phase charge pump with full-coverage integer voltage conversion ratios (VCRs) ranges from 1 to 2 n is proposed. To improve the systematic efficiency of multi-phase charge pump, the critical aspect of nonoverlapping (NON) time is designed. To precisely set the NON time of multi-phase clock signals, counter-based solution is proposed. The solution makes NON time to be evenly inserted into every clock phase and achieves equal charging period. In addition, an efficiency enhancement scheme is used by turning off some unnecessary converter stages to improve the efficiency at some particular VCRs. Based on 0.25process, this proposed control strategy is conducted in a multi-phase power converter. And its peak efficiency and current drivability can reach 96% and 6 mA, respectively. Author KeywordsMulti-phase charge pump; counter-based; efficiency enhancement; current drivability; display driver.

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“…The authors are with the Department of Electrical Engineering, KU Leuven, B-3001 Heverlee, Belgium, e-mail: nicolas.butzen@esat.kuleuven.be . high power density [10]- [12] or efficiency [13]- [15] to large voltage conversion ratio's (VCR's) [16], [17], and have been used for many different applications, including mobile [18], [19], MEMS [20] and the internet-of-things (IoT) [21]- [23]. In spite their popularity, however, there are still many research directions to be explored and issues to be solved, two of which are touched upon in this paper.…”

Section: Introductionmentioning

confidence: 99%