MIC3809YMM-TR

The MIC3809YMM-TR from Microchip Technology is a complementary output push-pull PWM controller IC designed for high speed and low power consumption. It is suitable for telecom-level (36V to 75V) isolated step-down DC/DC conversion applications requiring high output current, small size, and high efficiency.

This controller utilizes a dual-ended push-pull architecture for efficient transformer utilization and a higher effective duty cycle, reducing input and output ripple. The dead-time between outputs is adjustable from 60ns to 200ns, limiting each output stage's duty cycle to less than 50%. Built on a BiCMOS process, it boasts a low 130 µA start-up current and 1mA run current for high efficiency even at light loads. The internal 4MHz error amplifier allows operation up to 1MHz.

The MIC3809YMM-TR is available in an 8-MSOP package and operates within a temperature range of -40°C to +85°C. Its output drive stages can handle 500mA peak source current and 1A peak sink current. Key features include leading-edge current-sense blanking, internal soft start, and on-chip VDD clamping.

Applications include high-efficiency power supply modules, half-bridge, full-bridge, and push-pull converters, as well as telecom, networking, industrial, and automotive power supplies.