효율적인 모바일 시스템 전력공급을 위한 전압 모드 2-페이스 벅 변환기
An Efficient Voltage Mode 2-Phase Buck Converter for Mobile Systems
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초록
최근 휴대용 전자기기의 발달로 인해 전력관리회로 기술의 중요성이 증가하고 있다. 본 논문에서는 휴대기기를 위한 고성능 DC-DC 벅 변환기를 설계하였으며 특히 출력에서의 리플 전압을 작게 하고 수 A급의 대용량 출력 전류의 안정적인 구동이 가능하도록 2-페이스 구조를 사용하여 설계하였다. 설계된 전압모드 2-페이스 벅 변환기는 0.35μm CMOS 공정을 통하여 칩으로 제작되었고 전체 칩의 크기는 2.35×2.35mm, 동작주파수는 4MHz, 최대 4A의 부하전류를 구동할 수 있으며 최대 변환효율은 91% 이다.
Abstract
Recently, Importance of power management circuit technology is increased with the development of portable electric devices. This paper presents a high performance DC-DC buck converter for mobile applications. Especially, presented design have low ripple voltages and driving capability of large load current. A designed voltage mode 2-phase DC-DC converter is implemented in a 0.35μm CMOS process, and the overall size is 2.35×2.35mm. The peak efficiency is 91% with a 4MHz frequency and the maximum load current is 4A.
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