The IR35403MTRPBF is a synchronous buck regulator from International Rectifier (now Infineon Technologies). It is designed for use in applications such as server motherboards, graphics cards, and other high-current power supplies where efficiency and small size are critical.

Applications:

• Server motherboards
• Graphics cards
• High-current point-of-load regulators
• Voltage regulators for processors and memory
• Networking equipment

Features:

• Integrated MOSFET drivers: Simplifies the design and reduces component count.
• Synchronous rectification: Improves efficiency by reducing power losses in the low-side MOSFET.
• Adjustable switching frequency: Allows for optimization of efficiency and transient response.
• Overcurrent protection: Protects the load from excessive current.
• Overtemperature protection: Protects the regulator from thermal damage.
• Undervoltage lockout: Prevents the regulator from operating with insufficient input voltage.
• Power Good output: Indicates when the output voltage is within regulation.
• Small footprint: Allows for compact designs.

Benefits:

• High efficiency: Reduces power losses and improves overall system efficiency.
• Small size: Allows for compact designs.
• Simplified design: Reduces the complexity of the power supply circuit.
• Robust protection: Protects the load and the regulator from damage.
• Improved system reliability: The built-in protection features prevent damage from common electrical faults.

Additional Details:

The IR35403MTRPBF typically operates with an input voltage range suitable for server and graphics card applications. The switching frequency can be adjusted using external components. Refer to the datasheet for detailed electrical characteristics, thermal performance, application guidelines, and component selection recommendations.