Title :
A hybrid DC-DC converter for sub-microwatt sub-1V implantable applications
Author :
Wieckowski, Michael ; Chen, Gregory K. ; Seok, Mingoo ; Blaauw, David ; Sylvester, Dennis
Author_Institution :
University of Michigan, Ann Arbor, U.S.A.
Abstract :
A DC-DC converter for sub-microwatt sub-1V loads is presented for efficient supply regulation of implantable devices powered by thin-film batteries. Using a hybrid, switched-capacitor architecture, it provides 444mV of DC output from a 3.6V DC source. Ultra-low power clock generation, level conversion, and linear regulation, combined with a unique startup circuit, enable a peak efficiency of 56% (4.6X ideal linear regulator) for loads from 5nA to 500nA. Fabricated in 130nm CMOS, it occupies 0.26mm2.
Keywords :
Battery charge measurement; Circuits; Clocks; DC-DC power converters; Model driven engineering; Oscillators; Regulators; Switches; Switching converters; Voltage;
Conference_Titel :
VLSI Circuits, 2009 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
978-1-4244-3307-0
Electronic_ISBN :
978-4-86348-001-8
