The IR35408MTRPBF is a synchronous buck regulator from International Rectifier (now Infineon Technologies). It's a highly integrated device designed for efficient power delivery in a variety of applications.

Applications

• Notebook and desktop computers
• Server and workstation power supplies
• Graphics cards
• Point-of-load (POL) converters
• Embedded systems

Features

• Input Voltage Range: 4.5V to 17V
• Output Voltage Range: 0.25V to 5.5V
• Output Current: Up to 8A
• Integrated MOSFET Drivers
• Programmable Switching Frequency: 250 kHz to 1.5 MHz
• Overcurrent Protection (OCP)
• Overvoltage Protection (OVP)
• Undervoltage Protection (UVP)
• Thermal Shutdown Protection (OTP)
• Remote Sense Capability
• Power Good Output
• PWM Control
• QFN Package

Benefits

• High efficiency reduces power loss and heat generation.
• Integrated MOSFET drivers simplify design and reduce component count.
• Programmable switching frequency allows optimization for efficiency or transient response.
• Comprehensive protection features ensure reliable operation and prevent damage to the regulator and load.
• Remote sense capability improves output voltage accuracy at the load.
• Small QFN package saves space on the circuit board.

Additional Details

The IR35408MTRPBF is a highly efficient synchronous buck regulator that utilizes advanced control techniques to minimize power losses. It features integrated MOSFET drivers, which simplify the design and reduce the number of external components required. The programmable switching frequency allows designers to optimize the regulator for either high efficiency or fast transient response. The device also includes a comprehensive set of protection features, such as overcurrent protection, overvoltage protection, undervoltage protection, and thermal shutdown protection. These features ensure reliable operation and prevent damage to the regulator and the load. The remote sense capability improves the accuracy of the output voltage at the load by compensating for voltage drops in the PCB traces. It is designed to be used in systems requiring tightly regulated voltage rails for sensitive components like processors and memory.

The IR35408MTRPBF uses a constant-on-time (COT) control architecture which provides fast transient response and stable operation over a wide range of operating conditions. The regulator is typically configured using external resistors and capacitors to set the output voltage and switching frequency. The power good output indicates whether the output voltage is within the specified tolerance.