10.7 A 25MHz 4-phase SAW hysteretic DC-DC converter with 1-cycle APC achieving 190ns t&lt;inf&gt;settle&lt;/inf&gt; to 4A load transient and above 80% efficiency in 96.7% of the power range

Lee, Bumkil; Song, Min Kyu; Maity, Arnab; Brian, D.

doi:10.1109/isscc.2017.7870325

Cited by 12 publications

(3 citation statements)

References 4 publications

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“…6 (c)). An adaptive phase control is mostly used together with a multiple phase control [2], [7], [9], [11], [12], [15], [18]- [21], [23], [25]- [27], [29], [30], [32], [33], [43]- [45], [49]- [51], [55], [60], where each phase is shifted by 360/N degree (N is the total number of phases). This scheme can basically reduce the ripple current by the factor of N, or it can even perfectly cancel out the ripple current at certain duty.…”

Section: Design Strategy and Basic Circuit Techniquesmentioning

confidence: 99%

Design and Integration of Beyond-10MHz High Switching Frequency DC-DC Converter

Miyaji

2022

IEICE Trans. Electron.

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There are continuous and strong demands for the DC-DC converter to reduce the size of passive components and increase the system power density. Advances in CMOS processes and GaN FETs enabled the switching frequency of DC-DC converters to be beyond 10MHz. The advancements of 3-D integrated magnetics will further reduce the footprint. In this paper, the overview of beyond-10MHz DC-DC converters will be provided first, and our recent achievements are introduced focusing on 3Dintegration of Fe-based metal composite magnetic core inductor, and GaN FET control designs.

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Section: Design Strategy and Basic Circuit Techniquesmentioning

confidence: 99%

Design and Integration of Beyond-10MHz High Switching Frequency DC-DC Converter

Miyaji

2022

IEICE Trans. Electron.

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“…The main difference between switching regulators and linear ones, is that switching regulators store power in one phase, and discharge it in a second phase, so the current is 90 o out of phase with the voltage, while linear regulators uses voltage drop to regulate the voltage. So, energy within switching regulators can be stored and recovered during the discharge phase of the switching cycle, which make them higher in efficiency and more attractive for EHS for IoT smart nodes [73][74][75][76][77][78][79][80][81][82][83][84]. Thus, for maximum charge transfer efficiency, the clock duty cycle tends to be 50% with a small non-overlap period to avoid shoot-through current.…”

Section: Switching Regulatorsmentioning

confidence: 99%

Ultra-low power energy harvesting and power management circuits for IoT applications

Rawy¹

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Recent progress in integrated circuits (IC) technology and design techniques, especially in ultra-low power circuits domain, has led a rapid growth of fully integrated and portable electronics within internet of things (IoT) smart nodes and wearable sensors system on chip (SoC). IoT applications including biomedical sensors, body area networks and wireless sensors, have taken advantage of such a progress. However, with the increase of people needs, numerous blocks must be integrated within the IoT SoC. Hence, a compact, efficient and self-sustained power management circuit (PMC) with a long life-time design becomes crucial for IoT SoC. Thus, energy scavengers, such as photovoltaic cells (PV), thermos-electric generators (TEG) and electro-static harvesters, become an attractive solution to power the PMC, for self-sustaining and

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“…The maximum load current is defined by the class AB output swing. For a maximum differential output swing of 2.6V, the peak load current demanded by the amplifier is 2.6 V/16 Ω=162.5 mA.For the selection of the control schemes, hysteretic control has becoming very popular in recent years for its inherent fast loop response[47][48][49][50][51][52]. However, the switching frequency of the hysteretic converter is dependent on several design parameters such as the input and output voltages, load current, hysteresis window and so forth.…”

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confidence: 99%

Analysis and design of an adaptive-supply class H audio power amplifier for mobile devices

Zhang¹

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which operates with only single-rail supply. The supply to the output stage is designed to be adaptive to the instant input signal level so that the voltage drop across the power transistor is kept constant. Therefore, compared with other linear amplifier architectures (class B/AB/G), the proposed design features much better overall power efficiency. An existing issue with the above-mentioned adaptive-supply amplifiers is the additional distortions that occur during mode switching. For class G topology when the switching threshold is reached, the supply voltage sees step changes during the low to high transitions. These abrupt changes tend to add distortions to the outputs of the amplifier. Therefore, for conventional adaptive-supply amplifiers, there is a sudden burst in the Total Harmonic Distortion (THD) when the high supply starts operating. In this research, we proposed a common-mode modulation (CMM) scheme to resolve this problem. Instead of changing the system configuration upon the triggering of mode switching, the amplitude information of the input signal is extracted and embedded into the common-mode (CM) voltage of the vi

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10.7 A 25MHz 4-phase SAW hysteretic DC-DC converter with 1-cycle APC achieving 190ns t<inf>settle</inf> to 4A load transient and above 80% efficiency in 96.7% of the power range

Cited by 12 publications

References 4 publications

Design and Integration of Beyond-10MHz High Switching Frequency DC-DC Converter

Design and Integration of Beyond-10MHz High Switching Frequency DC-DC Converter

Ultra-low power energy harvesting and power management circuits for IoT applications

Analysis and design of an adaptive-supply class H audio power amplifier for mobile devices

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