Fully integrated ultra-low-power asynchronously driven step-down DC-DC converter

Hasib, Omar Al-Terkawi; Savaria, Yvon

doi:10.1109/iscas.2010.5537420

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Designs with microwatt-level quiescent consumption are available in the literature [80], and the average power can be further reduced with duty-cycled clock generators [30]. Asynchronous topologies [81] that rely on event-driven switching can offer potential power savings. For example, the power conditioning circuit of [20] uses the output of the comparator of a synchronous half-wave rectifier circuit as the switching signal for a voltage doubler, thus requiring no additional control circuitry.…”

Section: A Dc-dc Charge Pumpsmentioning

confidence: 99%

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Szarka

Stark

Burrow

2012

IEEE Trans. Power Electron.

286

148

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In this paper, a summary of published techniques for power conditioning within energy harvesting systems is presented. The focus is on low-power systems, e.g, <10 mW, for kinetic energy harvesting. Published concepts are grouped according to functionality and results contrasted. The various techniques described are considered in terms of complexity, efficiency, quiescent power consumption, startup behavior, and utilization of the harvester compared to an optimum load. This paper concludes with an overview of power management techniques that aim to maximize the extracted power and the utilization of the energy harvester.

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Section: A Dc-dc Charge Pumpsmentioning

confidence: 99%

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Szarka

Stark

Burrow

2012

IEEE Trans. Power Electron.

286

148

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An asynchronous finite-state-machine-based buck-boost converter for on-chip adaptive power supply

Fernandez

Madrenas

Alarcón

2012

Analog Integr Circ Sig Process

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In this paper we present an asynchronous finite-state machine digital controller co-integrated with an on-chip non-inverting buck-boost power converter with dynamic signal-tracking capabilities. The mostly-digital controller functionally implements a non-PWM zone-wise control law through asynchronous circuitry, thus exhibiting\ud self-timed minimum latency and ultra low power operation due to gate switching activity. Experimental results on a\ud 0.35 lm CMOS technology demonstrate an efficiency up to 80 % with a switching frequency of 2.86 MHzPeer ReviewedPostprint (published version

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A Low-Power Asynchronous Step-Down DC–DC Converter for Implantable Devices

Hasib

Savaria

2011

IEEE Trans. Biomed. Circuits Syst.

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In this paper, we present a fully integrated asynchronous step-down switched capacitor dc-dc conversion structure suitable for supporting ultra-low-power circuits commonly found in biomedical implants. The proposed converter uses a fully digital asynchronous state machine as the heart of the control circuitry to generate the drive signals. To minimize the switching losses, the asynchronous controller scales the switching frequency of the drive signals according to the loading conditions. It also turns on additional parallel switches when needed and has a backup synchronous drive mode. This circuit regulates load voltages from 300 mV to 1.1 V derived from a 1.2-V input voltage. A total of 350 pF on-chip capacitance was implemented to support a maximum of 230-μ W load power, while providing efficiency up to 80%. The circuit validating the proposed concepts was fabricated in 0.13- μm complementary metal-oxide semiconductor technology. Experimental test results confirm the expected functionality and performance of the proposed circuit.

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Fully integrated ultra-low-power asynchronously driven step-down DC-DC converter

Cited by 3 publications

References 7 publications

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Review of Power Conditioning for Kinetic Energy Harvesting Systems

An asynchronous finite-state-machine-based buck-boost converter for on-chip adaptive power supply

A Low-Power Asynchronous Step-Down DC–DC Converter for Implantable Devices

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