Product Overview: LT4256-1IS8

The LT4256-1IS8 from Linear Technology is a robust, high-voltage Hot Swap controller designed to allow a board to be safely inserted and removed from a live backplane. This component is housed in a compact IS8 package and is engineered to manage the inrush current to prevent system glitches due to supply rail droop and to protect the backplane from damage caused by faulty or improperly inserted boards.

Key Features

• Wide Operating Range: The LT4256-1IS8 operates over a voltage range of 10.8V to 80V, making it versatile for various applications in telecommunications, data communications, and industrial systems.
• Adjustable Inrush Current Control: Users can adjust the inrush current through an external capacitor, which sets the rate of rise of the gate voltage of the external N-channel pass transistor.
• Overcurrent Protection: The device features foldback current limiting to protect the system during overcurrent conditions. This is coupled with a circuit breaker function to provide additional protection.
• High-Speed Fault Shutdown: In the event of a fault condition, the LT4256-1IS8 responds quickly with a fast shutdown of the gate to minimize damage.
• Undervoltage Lockout (UVLO): The UVLO function ensures that the controller remains off until the supply voltage reaches a safe operating level.

Applications

• Hot Swap Systems
• Network Servers and Routers
• Industrial Equipment
• Redundant Power Supplies

Product Benefits

The LT4256-1IS8 is designed to simplify the design of Hot Swap applications by integrating control features that help reduce the number of external components required. Its ability to handle high voltage and provide precise control over inrush current makes it an excellent choice for systems that require reliable and safe insertion and removal of circuit boards. Moreover, its robust protection features ensure the longevity and stability of critical systems.