An Ultra-Low-Power Power Management IC for Wireless Sensor Nodes
Seeman, M.D.
Sanders, S.R.
Rabaey, J.M.
California Univ., Berkeley;
This paper appears in: Custom Integrated Circuits Conference, 2007. CICC '07. IEEE
Publication Date: 16-19 Sept. 2007
On page(s): 567-570
Location: San Jose, CA,
ISBN: 978-1-4244-1623-3
INSPEC Accession Number: 9811033
Digital Object Identifier: 10.1109/CICC.2007.4405795
Current Version Published: 2008-01-21
Abstract
A power interface IC is designed and demonstrated to convert and manage power for a wireless tire pressure sensor node. Power conversion is performed using on-chip switched-capacitor converters with size-optimized devices and level-shifting gate drivers. A synchronous rectifier efficiently harvests energy from an electromagnetic shaker and control circuitry regulates the output voltage while minimizing power consumption. The converters achieve efficiencies approaching 80%.
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