Sleep-mode ready, area efficient capacitor-free low-dropout regulator with input current-differencing

Hu, John; Liu, Wei; Ismail, Mohammed

doi:10.1007/s10470-009-9441-4

Cited by 6 publications

(1 citation statement)

References 10 publications

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“…The bottleneck of power efficiency improvement, however, lies in the sleep mode [1]. For example, batteryoperated IEEE 802.15.4/Zigbee sensor nodes will be in sleep mode 99.9% of the time, waking up periodically for a few milliseconds to check a sensor or poll the other radios.…”

Section: Introductionmentioning

confidence: 99%

Increasing sleep-mode efficiency by reducing battery current using a DC-DC converter

Liu

Khalil

et al. 2010

2010 53rd IEEE International Midwest Symposium on Circuits and Systems

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Battery current is a key parameter that decides the runtime of a portable electronic system. For low power applications like IEEE 802.15.4 and Zigbee wireless network, the average battery current drain approximates the sleep mode current drain, since significantly more time is spent in sleep than in active usage. This paper proposes substituting a DC-DC converter for a low drop-out (LDO) regulator in the sleep mode power chain, such that the current drawn from the battery would be less than the actual current drained by the load. The battery current saving, and hence battery runtime extension, is estimated to be around 35% based on the analysis of a 65 nm CMOS IEEE 802.15.4/Zigbee low power wireless system-on-chip (SoC) model, whose parameters are extracted from state-of-theart industrial products and experimental data from advanced nanometer processes.

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Section: Introductionmentioning

confidence: 99%