MIC3838YMM

The MIC3838YMM from Microchip Technology is a complementary output push-pull PWM control IC offering 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 is designed for flexibility, configurable for either voltage-mode or current-mode control. It easily implements a volt-second clamp to limit the duty cycle during input transients, allowing for smaller transformers and power components. The dual-ended push-pull architecture enhances transformer utilization and allows for a higher effective duty cycle, reducing input and output ripple.

The MIC3838YMM features adjustable dead-time between 60ns to 200ns, limiting each output stage's duty cycle to less than 50%. It has a typical start-up current of 130 µA and a typical run current of 1 mA. The device operates up to 1MHz and includes an on-chip error amplifier with a 4MHz gain bandwidth product. It is housed in a compact 10-MSOP package and operates within a temperature range of -40°C to +85°C.

Key electrical characteristics include a nominal operating voltage range of 8.3V to 15V, a maximum duty cycle of 49%, and fault protection via current limiting. The output drive stages can handle 500mA peak source current and 1A peak sink current. The mounting type is surface mount.