The LTC4252-2CMS is a sophisticated negative voltage hot swap controller designed by Linear Technology to enable safe board insertion and removal from a live backplane. This integrated circuit is particularly suitable for systems that operate with negative supply voltages, such as -48V telecom systems, providing a controlled power-up sequence which helps to prevent damage to both the card and the backplane.

Key Features:

• Wide Operating Range: The LTC4252-2CMS is capable of handling a wide range of negative voltages, typically from -9V to -80V, making it versatile for various applications.
• Adjustable Current Limit: This feature allows the user to set a precise current limit threshold, which helps to protect the system from overcurrent conditions.
• Gate Drive for External N-Channel MOSFET: The controller provides a gate drive for an external N-Channel MOSFET, which is used as the main power control element.
• Overcurrent and Overtemperature Protection: The device includes protection features that shut down the MOSFET when an overcurrent or overtemperature condition is detected.
• Undervoltage Lockout (UVLO): The LTC4252-2CMS ensures that the MOSFET remains off if the input voltage is below a certain threshold, preventing system malfunctions.
• Charge Pump Circuitry: The built-in charge pump circuitry ensures that the gate voltage is sufficient to fully enhance the external N-Channel MOSFET.

Applications:

The LTC4252-2CMS is ideal for various applications that require reliable hot swap capabilities with negative voltages. These include:

• Telecommunications equipment
• Datacom infrastructure
• Network servers and storage systems
• Industrial systems

Package Information:

The LTC4252-2CMS comes in a compact MSOP-10 package, which is suitable for space-constrained applications. Its small footprint allows for efficient use of board space while providing robust hot swap functionality.

Conclusion:

With its advanced features and reliable performance, the LTC4252-2CMS from Linear Technology stands out as a premier solution for managing hot swap events in negative voltage environments. Its comprehensive protection mechanisms and adjustable settings ensure that it can be tailored to meet the specific needs of various high-availability systems.