A Reliability and Efficiency Optimization System for Hard-Switching DC/DC Converters

The Large Hadron Collider experiments at CERN will use power distribution schemes relying on integrated buck DC/DC converters. Due to the radiation-hardness requirements, the devices used for the development of such converters will have a voltage rating which is close to the converters' input voltage. The voltage spikes generated during the hard-switching operation can affect the reliability of such low-voltage MOSFETs. A fixed and sufficiently small gate driver current for the high-side switch could be used to guarantee the reliable operation even in the worst-case conditions in terms of input voltage, output current, temperature and process variations. Nevertheless, this would result in a suboptimal efficiency in all the other working conditions. This work presents an integrated system than monitors in real-time the, voltage stress, and adjusts the gate driver current to achieve maximum efficiency in all conditions, while ensuring compliance with the reliability specifications. A buck converter including the, voltage peak detector and an adjustable gate driver current has been designed in a 130 nm technology, demonstrating the functionality of the voltage stress monitoring system.

Published in:
2018 16Th Ieee International New Circuits And Systems Conference (Newcas), 157-161
Presented at:
16th IEEE International New Circuits and Systems Conference (NEWCAS), Montreal, CANADA, Jun 24-27, 2018
Jan 01 2018
New York, IEEE

 Record created 2019-06-18, last modified 2020-04-20

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