The International Rectifier (now Infineon) IR3840F is a high-efficiency synchronous buck regulator designed for demanding point-of-load applications. This device integrates control, gate drive, and MOSFETs into a small PQFN package, simplifying design and minimizing board space. It delivers exceptional power density and transient response, making it ideal for powering CPUs, GPUs, memory, and other sensitive loads in servers, workstations, and communication equipment.

Applications

• Servers: Powering CPU and memory in server systems.
• Workstations: Regulating voltage for high-performance processors and graphics cards.
• Networking Equipment: Providing stable power for routers, switches, and other communication infrastructure.
• High-End Computing: Delivering power to FPGAs, ASICs, and other programmable logic devices.
• Point-of-Load Regulation: Regulating voltage close to the load to minimize voltage drops and improve transient response.
• Embedded Systems: Powering microprocessors and peripherals in embedded applications.
• Industrial Automation: Supplying power to control systems and automation equipment.

Features

• Integrated MOSFETs: Incorporates both high-side and low-side MOSFETs for efficient power conversion.
• Synchronous Buck Topology: Provides high efficiency and reduces power loss.
• Wide Input Voltage Range: Operates from a wide input voltage range, typically 4.5V to 25V.
• Adjustable Output Voltage: Allows for precise output voltage adjustment to meet specific application requirements.
• Programmable Switching Frequency: Offers the ability to optimize switching frequency for efficiency and transient response.
• Overcurrent Protection (OCP): Protects the regulator and load from overcurrent conditions.
• Overtemperature Protection (OTP): Prevents damage due to excessive temperature.
• PQFN Package: Small PQFN package provides excellent thermal performance and minimizes board space.
• Enable Input: Allows for easy on/off control of the regulator.

Benefits

• High Efficiency: Reduces power consumption and heat generation.
• High Power Density: Delivers more power in a smaller footprint.
• Fast Transient Response: Quickly responds to changes in load current, minimizing voltage droop and overshoot.
• Simplified Design: Integrated components reduce external component count and simplify board layout.
• Robust Protection: Overcurrent and overtemperature protection ensure reliable operation.
• Wide Operating Range: Versatile operation across a range of input voltages and temperatures.

Additional Details

Technical Specifications:

• Input Voltage Range: 4.5V to 25V
• Output Voltage Range: 0.7V to 85% of Vin
• Maximum Output Current: Typically up to 12A (dependent on application conditions)
• Switching Frequency: Adjustable, typically from 200 kHz to 1.5 MHz
• Operating Temperature Range: -40°C to +125°C
• Package: PQFN 5x6 mm

The Infineon IR3840F is a highly efficient and versatile synchronous buck regulator ideal for demanding point-of-load applications. Its integrated features, robust protection, and high power density make it an excellent choice for a wide range of electronic devices and systems.