The International Rectifier (now Infineon) IR3556MTR is a high-performance PowIRstage® integrated synchronous buck regulator. It combines a synchronous buck MOSFET driver with control MOSFET and synchronous MOSFET in a single package. It's designed for high-current, high-frequency synchronous buck converters, commonly used in computing and server applications.

Applications:

• VRMs (Voltage Regulator Modules) for CPUs and GPUs
• Server Power Supplies
• High-Current DC-DC Converters
• Point-of-Load (POL) Regulators
• High-Performance Computing Systems

Features:

• Integrated Synchronous Buck MOSFET Driver, Control MOSFET, and Synchronous MOSFET
• High Efficiency
• High Switching Frequency Capability
• Over-Current Protection (OCP)
• Over-Temperature Protection (OTP)
• Under-Voltage Lockout (UVLO)
• Thermally Enhanced Package
• Small Footprint

Benefits:

• Improved Efficiency: Integrated design and optimized MOSFETs minimize power losses and maximize efficiency.
• Higher Power Density: Compact package allows for higher power density in space-constrained applications.
• Simplified Design: Integrated driver and MOSFETs simplify the design process and reduce component count.
• Enhanced Reliability: Built-in protection features ensure reliable operation and prevent damage to the device and the load.
• Improved Thermal Performance: Thermally enhanced package provides excellent heat dissipation.

The IR3556MTR is designed to operate with a wide input voltage range and provides a highly accurate and stable output voltage. The switching frequency is typically adjustable to optimize efficiency and transient response. The over-current protection feature protects the load from excessive current draw, while the over-temperature protection prevents the device from overheating. The under-voltage lockout ensures that the device does not operate until the input voltage is within the specified range. The Infineon (formerly International Rectifier) datasheet for the IR3556MTR provides detailed information on the device's electrical characteristics, thermal performance, and application circuits. The integration of the driver and MOSFETs also minimizes parasitic inductance, further improving performance.