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    초록·키워드

    This paper presents a new CMOS 3.3–1 V synchronous buck DC/DC converter that employs operational transconductance amplifiers (OTAs) as circuit-building blocks. An error amplifier OTA in a PWM circuit is compensated for to improve temperature stability. The temperature coefficient of the transconductance gain of the compensated OTA is less than 150 ppm/°C over 0–100°C. The HSPICE simulation results of the 0.35µm standard CMOS technology show that the efficiency of the proposed converter is as high as 80% in the load current range of 40–125 mA. These results show that the proposed converter is adequate for use in battery-operated systems.

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      UCI(KEPA) : I410-ECN-0101-2013-569-001044343