The International Rectifier (now Infineon) IR3500M is a synchronous buck regulator controller IC designed for high-performance power supply applications. It provides a complete solution for controlling the output voltage and current in DC-DC converters.

Applications

• Voltage Regulator Modules (VRMs) for CPUs and GPUs
• Server power supplies
• Desktop computer power supplies
• Point-of-Load (POL) converters

Features

• Synchronous buck topology
• Voltage mode control
• Programmable switching frequency
• Overcurrent protection (OCP)
• Overvoltage protection (OVP)
• Undervoltage lockout (UVLO)

Benefits

• High efficiency
• Precise voltage regulation
• Robust protection features
• Simplified design
• Reduced component count

Additional Details

The IR3500M utilizes a voltage mode control scheme to provide precise output voltage regulation. It features a programmable switching frequency, allowing designers to optimize the converter's performance for specific applications. The IC incorporates comprehensive protection features, including overcurrent protection (OCP), overvoltage protection (OVP), and undervoltage lockout (UVLO), safeguarding the converter and the load from potential damage. The synchronous buck topology minimizes power losses and improves overall efficiency. The IR3500M is typically used in conjunction with external MOSFETs to implement a complete synchronous buck converter. The device's datasheet provides detailed information on its electrical characteristics, timing parameters, and application circuits. Its feedback loop compensation is typically required to ensure stable operation. The IR3500M simplifies the design of high-performance power supplies, reducing the component count and minimizing the PCB area. Its robust protection features enhance system reliability and prevent damage due to fault conditions. The device is designed to operate over a wide input voltage range and is suitable for various power supply applications. It is commonly used in computing and networking equipment, where precise voltage regulation and high efficiency are critical. The IR3500M's voltage mode control provides excellent transient response, ensuring stable operation under dynamic load conditions.