대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

모바일 기기를 위한 ESD 보호 소자 내장형 고효율 DC-DC 컨버터 설계

The design of high efficiency DC-DC Converter with ESD protection device for Mobile application

  • Ha, Ka-San (Department of Electornic Engineering, Seokyeong University) ;
  • Son, Jung-Man (Department of Electornic Engineering, Seokyeong University) ;
  • Shin, Samuell (Department of Electornic Engineering, Seokyeong University) ;
  • Won, Jong-Il (Department of Electornic Engineering, Seokyeong University) ;
  • Kwak, Jae-Chang (Department of Electornic Engineering, Seokyeong University) ;
  • Koo, Yong-Seo (Department of Electornic Engineering, Seokyeong University)
  • 발행 : 2008.06.18
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초록

The high efficiency power management IC(PMIC) for Moblie application is proposed in this paper. PMIC is controlled with PWM control method in order to have high power efficiency at high current level. The saw-tooth generator is made to have 1.2 MHz oscillation frequency and full range of output swing from ground to supply voltage(VDD:3.3V). The comparator is designed with two stage OP amplifier. And the error amplifier has 70dB DC gain and $64^{\circ}$ phase margin. DC-DC converter, based on Voltage-mode PWM control circuits, achieved the high efficiency near 95% at 100mA output current. DC-DC converter is designed with LDO in stand-by mode which fewer than 1mA for high efficiency.

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