Challenge on compact size DC-DC buck converters with high-speed current sensor and on-chip inductors

Shih Min Chen*, Chun Yu Hsieh, Ke-Horng Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper proposes a compact size DC-DC buck converter toward on-chip inductors and minimized external components. Multi-phase, high switching frequency and pseudo continuous conduction mode (PCCM) techniques [1] achieve the possibility to implement on-chip inductors. The effective inductance is about 20nH. Due to high switching frequency above 20MHz, it is a challenge to have a highly accurate current sense for high performance of converters. Simulation results demonstrate that the accuracy of high-speed current sensor is about 95%. Besides, mode switch between pulse width modulation (PWM) and pulse frequency modulation (PFM) alleviates the limitation of high-speed current sensor in case of light load condition. Compact size design of converter is an advanced technique as a power module for system-on-chip (SOC) designs.

Original languageEnglish
Title of host publication2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference Proceedings
Pages670-673
Number of pages4
DOIs
StatePublished - 1 Dec 2007
Event2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference - Montreal, QC, Canada
Duration: 5 Aug 20078 Aug 2007

Publication series

NameMidwest Symposium on Circuits and Systems
ISSN (Print)1548-3746

Conference

Conference2007 50th Midwest Symposium on Circuits and Systems, MWSCAS - Conference
CountryCanada
CityMontreal, QC
Period5/08/078/08/07

Fingerprint Dive into the research topics of 'Challenge on compact size DC-DC buck converters with high-speed current sensor and on-chip inductors'. Together they form a unique fingerprint.

Cite this