Fully Integrated DC-DC Converter and a 0.4V 32-bit CPU with Timing-Error Prevention Supplied from a Prototype 1.55V Li-ion Battery - UTU Tutkimustietojärjestelmä

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Fully Integrated DC-DC Converter and a 0.4V 32-bit CPU with Timing-Error Prevention Supplied from a Prototype 1.55V Li-ion Battery

Tekijät: Turnquist M, Hiienkari M, Makipaa J, Jevtic R, Pohjalainen E, Kallio T, Koskinen L

Toimittaja: No editors available

Konferenssin vakiintunut nimi: Symposium on VLSI Circuits-Digest of Papers

Julkaisuvuosi: 2015

Kokoomateoksen nimi: 2015 Symposium on VLSI Circuits-Digest of Papers

Tietokannassa oleva lehden nimi: 2015 SYMPOSIUM ON VLSI CIRCUITS (VLSI CIRCUITS)

Lehden akronyymi: SYMP VLSI CIRCUITS

Sivujen määrä: 2

ISBN: 978-4-86348-502-0

DOI: https://doi.org/10.1109/VLSIC.2015.7231307

Tiivistelmä

We introduce an ultra-low-energy system comprised of a prototype 1.55V Li-ion battery, fully integrated switched-capacitor (SC) DC-DC 3: 1 converter, and a 32-bit RISC CPU with timing-error prevention (TEP). The DC-DC converter and CPU are manufactured in 28nm UTBB FD-SOI. The DC-DC converter uses the battery's flat discharge curve and low nominal voltage to achieve a peak efficiency of 85%. The CPU operates from 0.3V-0.5V and with energy as low as 4.9pJ/cyc. The battery, DC-DC converter, and CPU system is able to operate with an average energy of 8pJ/cyc over 95% of the battery's discharge curve in the temperature range of -20 degrees C to 70 degrees C.