The IR3802AMTRPBF is a high-efficiency synchronous buck regulator from Infineon Technologies, designed for point-of-load power conversion in a wide range of applications. This regulator features integrated MOSFETs, simplifying the design process and reducing the overall solution size. With its exceptional efficiency and comprehensive protection features, it's well-suited for powering sensitive electronic components in demanding environments.

Applications

• Server and workstation voltage regulation
• FPGA and ASIC power supplies
• Networking and telecommunications equipment
• Embedded systems
• Industrial automation

Features

• Integrated synchronous buck regulator
• Input voltage range: 2.5V to 21V
• Output voltage range: 0.6V to V<sub>IN
• Continuous output current: up to 3A
• High efficiency: up to 95%
• Adjustable switching frequency
• Overcurrent protection (OCP), undervoltage lockout (UVLO), and overtemperature protection (OTP)
• Enable input for power sequencing
• Pre-bias startup

Benefits

• High Efficiency: Synchronous rectification reduces power losses, resulting in cooler operation and extended battery life in portable applications.
• Simplified Design: Integrated MOSFETs minimize external components, simplifying PCB layout and reducing BOM cost.
• Flexible Configuration: Adjustable output voltage and switching frequency allow for optimization based on specific application requirements.
• Robust Protection: Comprehensive protection circuitry safeguards the regulator and load from damage due to fault conditions.
• Reliable Startup: Pre-bias startup prevents negative output voltage during power-up when driving pre-biased loads.

The IR3802AMTRPBF employs a synchronous buck topology, replacing the traditional rectifier diode with a low-resistance MOSFET to minimize conduction losses and boost efficiency. The adjustable switching frequency enables designers to optimize the trade-off between efficiency and component size, allowing for a smaller overall solution. The integrated overcurrent protection (OCP) monitors the output current and limits it to a safe level, protecting the regulator and the load from damage. Undervoltage lockout (UVLO) prevents the regulator from operating if the input voltage is too low, ensuring reliable startup. Overtemperature protection (OTP) shuts down the regulator if it overheats, preventing thermal damage.

The pre-bias startup feature ensures a smooth and controlled startup when the output is already biased, preventing glitches or negative voltages that could damage sensitive loads. The enable input provides precise control over the regulator's operation, allowing for power sequencing and other advanced power management techniques.