Efficiency optimization of multi-mode monolithic DC-DC converters

Author

Dias, Nuno ; Santos, Marcelino

Author_Institution

Inst. Super. Tecnico, Univ. de Lisboa, Lisbon, Portugal

fYear

2014

fDate

26-28 Nov. 2014

Firstpage

1

Lastpage

6

Abstract

This paper presents a detailed study of the power losses and efficiency optimization of a multi-mode Buck converter. The gate capacitive losses are compared to the conduction losses in order to find the optimum MOSFET V_GS that maximizes the converter efficiency. The developed models are compared to the simulation of two MOSFET families and a simple circuit implementation and control strategy is developed that allows achieving near optimum results. The obtained results for a 350mA Buck show that the average efficiency optimization is 11.7% for load currents below 10mA using the proposed methodology.

Keywords

DC-DC power convertors; MOSFET; MOSFET; control strategy; current 350 mA; efficiency optimization; gate capacitive losses; load currents; multimode Buck converter; multimode monolithic DC-DC converters; power losses; Capacitance; Integrated circuit modeling; Logic gates; MOSFET; Optimization; Switches; Buck; CMOS; DC-DC converter; efficiency optimization; gate driver; gate voltage; light load; power losses modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Design of Circuits and Integrated Circuits (DCIS), 2014 Conference on

Conference_Location

Madrid

Type

conf

DOI

10.1109/DCIS.2014.7035569

Filename

7035569