The LT4256-2IS8#PBF is a robust and versatile high voltage Hot Swap™ controller designed by Linear Technology to enable safe board insertion and removal from a live backplane. This component is housed in an 8-pin narrow SOIC package and is characterized by its ability to control the inrush current in high availability systems, thus protecting both the card and the backplane from the stress of direct current insertion.

Key Features

• Wide Operating Range: The LT4256-2IS8#PBF is capable of handling a wide voltage range, typically from 10.8V to 80V, making it suitable for a variety of applications within different voltage requirements.
• Adjustable Inrush Current Control: Users can adjust the inrush current through an external capacitor, allowing for precise control based on the specific needs of the application.
• Foldback Current Limit: This feature helps to protect the device under fault conditions by reducing the current limit as the output voltage drops.
• Overcurrent Protection: The controller has built-in overcurrent protection, which safeguards the device and the system from excessive currents that could cause damage.
• Undervoltage and Overvoltage Lockout: The LT4256-2IS8#PBF ensures that the system operates within a safe voltage range by locking out undervoltages and overvoltages.
• Gate Voltage Clamped at 15V: To protect the external MOSFET, the gate voltage is clamped, preventing it from exceeding 15V.
• Automatic Retry or Latch Off: The device features a selectable automatic retry or latch-off function for system fault response.
• Thermal Shutdown: Additional protection is provided by the thermal shutdown mechanism, which turns off the controller if it exceeds a certain temperature threshold.

Applications

The LT4256-2IS8#PBF is ideal for use in a variety of high availability systems such as servers, telecom, network routers, and switches where safe hot swapping is crucial. Its robust feature set ensures that the system remains operational and protected even during maintenance or upgrade procedures.

Quality and Reliability

As with all Linear Technology products, the LT4256-2IS8#PBF is manufactured to high standards, ensuring reliability and performance in demanding environments. With its comprehensive protection features and ability to manage high voltage applications, this Hot Swap™ controller is an excellent choice for designers looking to enhance system safety and longevity.