Session 16-3
A Hybrid DC-DC Converter for
Sub-Microwatt Sub-1V
Implantable Applications
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. |