LM2748MTC

Introduction to LM2748MTC

The LM2748MTC is an undivided synchronous DC-DC switching regulator controller produced by Repetitive Micro Devices. It provides a cost-efficient solution for step-down DC-DC switching regulator designs and offers integrated current mode control, precise reference, an externally adjustable switching frequency, and fixed high or adjustable soft-start times. This is also available with flexible output control using an enable pin that can be used as a pulse input or a voltage input.

Application Field of LM2748MTC

The LM2748MTC is specifically designed to be used in the following applications:

• Power supplies for telecom and networking equipment,
• PoE PDs (Power Device),
• Laptop and desktop PCs power supplies,
• Point-of-load supplies,
• LCD displays,
• Battery-powered systems, and
• Other industrial, automotive and consumer applications.

Working Principle of LM2748MTC

The LM2748MTC works on the principle of peak current mode control, which involves monitoring the current flowing through the power stage at the peak of its cycle. The controller senses the peak current voltage and modulates that voltage to control the output switching frequency. In this control method, the loop reacts faster around current than voltage, making it suitable for high-current applications.

The LM2748MTC also features low on-resistance internal MOSFETs for low Power-On-Time (POT) and soft-start functions. This ensures that the regulator starts up with low inrush current and minimal overshoot. The controller also features adjustable over-current and over-temperature protection for safeguarding the system from possible disasters.

Conclusion

The LM2748MTC from Repetitive Micro Devices is a DC-DC switching regulator controller with integrated peak current mode control and adjustable soft-start functions. Available with an extendable enable pin, the LM2748MTC offers an ideal solution for cost-effective, efficient, and reliable step-down DC-DC power supplies. It is suitable for a variety of applications, including telecom and networking equipment, laptop and desktop PCs, point-of-load supplies, LCD displays, battery-powered systems, and other industrial, automotive, and consumer applications.