A monolithic voltage-mode DC-DC converter with a novel oscillator and ramp generator

Chu Hyunho, Kim Jungmoon, Kim Chulwoo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A voltage-mode DC-DC converter with a novel oscillator and ramp generator is presented. The proposed oscillator and ramp generator has a simple structure and does not need an external reference signal generator to set the upper and lower levels of the ramp signal. The DC-DC converter was fabricated in a standard 0.5/μm CMOS process. The converter can operate from 465 kHz to 556 kHz with a supply voltage from 3 to 5.5 V, which is appropriate for portable electronic devices that are powered by a single-cell lithium-ion battery. The output ripple voltage is about 10 mV with a 10 /μF off-chip capacitor and a 10/μH off-chip inductor. The power conversion efficiency is over 80% for load currents from 30 to 400mA.

Original languageEnglish
Pages (from-to)683-688
Number of pages6
Journalieice electronics express
Volume5
Issue number17
DOIs
Publication statusPublished - 2008 Sep 10

Keywords

  • DC-DC converter
  • Oscillator and ramp generator
  • Pulsewidth-modulation (PWM)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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