Overview of LTC1421CSW from Linear Technology

The LTC1421CSW is a hot swap controller IC designed by Linear Technology to enable safe insertion and removal of boards in live backplane systems. This advanced controller is housed in a 16-lead wide-body SOIC package, ensuring a compact footprint for space-constrained applications.

Key Features

• Integrated Power Control: The LTC1421CSW provides precise control of the inrush current to the electronic load, protecting the backplane from the disturbances caused by the sudden addition or removal of boards.
• Adjustable Current Limit: It offers an adjustable current limit threshold via an external resistor. This allows for customization according to the specific needs of the application.
• Overcurrent Protection: The device includes a fast-acting overcurrent protection feature that safeguards the system against short-circuit and overcurrent conditions.
• Undervoltage Lockout: An undervoltage lockout (UVLO) function ensures that the controller is operational only when the supply voltage is within the acceptable range, preventing malfunction at low voltages.
• Thermal Protection: The LTC1421CSW also offers thermal shutdown protection, which turns off the external N-channel MOSFET when the die temperature exceeds a preset threshold, protecting the device from overheating.
• Status Indicators: It features status indicators that provide real-time feedback on the operation of the device, including power good and fault conditions.

Applications

The LTC1421CSW is well-suited for a variety of applications that require reliable power management and board protection, such as:

• Redundant power supplies
• RAID systems
• Servers and data storage systems
• Industrial computers
• Telecommunications equipment

Conclusion

The LTC1421CSW from Linear Technology is a robust and versatile hot swap controller, providing designers with a reliable solution for managing inrush current and protecting sensitive electronic systems during hot swapping. Its comprehensive feature set and ease of integration make it an ideal choice for high-availability systems where continuous operation is critical.