DC-DC converter with ON-time control in pulse-skipping modulation

Author

Emira, Ahmed ; Elwan, Hassan ; Abdelaziz, Salwa

Author_Institution

Newport Media Inc., Lake Forest, CA, USA

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

2746

Lastpage

2749

Abstract

In this paper, an integrated DC-DC (Buck) converter is presented. The Buck converter has two modes of operation. The continuous mode is used for heavy loads, and the pulse-skipping modulation (PSM) mode is used for light loads. To optimize the Buck converter efficiency in PSM mode, an ON-time control loop is utilized. Short-circuit and over-temperature protection schemes are used to improve the design robustness. Three Buck converters were integrated in a TSMC 0.25μm CMOS chip with 2×2mm² die area. Up to 93% and 86% efficiencies are achieved at 2.5V and 1.2V output, respectively, using 3.6V input.

Keywords

CMOS integrated circuits; DC-DC power convertors; integrated circuit design; pulse modulation; short-circuit currents; CMOS chip; PSM mode; buck converter; continuous mode operation; design robustness; integrated DC-DC converter; on-time control loop; over-temperature protection; pulse-skipping modulation; short-circuit; size 0.25 mum; voltage 1.2 V; voltage 2.5 V; voltage 3.6 V; Buck converters; DC-DC power converters; Diodes; Inductors; Protection; Pulse modulation; Pulse width modulation; Pulse width modulation converters; Virtual colonoscopy; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on

Conference_Location

Paris

Print_ISBN

978-1-4244-5308-5

Electronic_ISBN

978-1-4244-5309-2

Type

conf

DOI

10.1109/ISCAS.2010.5537025

Filename

5537025