Overview of LTC1643L-1CGN

The LTC1643L-1CGN is a sophisticated Hot Swap controller integrated circuit (IC) designed by Linear Technology, which is now part of Analog Devices. This product is engineered to allow a board to be safely inserted and removed from a live backplane. The device provides a controlled ramp-up of the supply voltage to the load, thereby limiting the inrush current to prevent damage to the connectors, backplane, and the load itself.

Key Features

• Electronic Circuit Breaker: The LTC1643L-1CGN is equipped with an electronic circuit breaker function that provides overcurrent protection by monitoring the load current through an external sense resistor and responding to overcurrent conditions.
• Adjustable Supply Ramp: Users can adjust the supply voltage ramp-up time by choosing appropriate values for an external capacitor, which allows for flexibility in managing inrush currents for different applications.
• Under Voltage Lockout (UVLO): The IC includes an under-voltage lockout feature that ensures the power supply voltage is at an adequate level before the load is connected, thus protecting the load from low voltage conditions.
• Compact Package: The LTC1643L-1CGN is available in a 16-pin narrow SSOP package that is suitable for space-constrained applications.

Applications

The LTC1643L-1CGN is ideal for a wide range of applications where safe insertion and removal of electronic equipment is critical. This includes:

• Redundant Power Supplies
• Hot Swap Rack Systems
• Network Servers and Storage Systems
• Telecommunications Equipment

Technical Specifications

With an operating temperature range of 0°C to 70°C, the LTC1643L-1CGN is designed to perform reliably in various environments. It supports a wide input voltage range, catering to diverse system requirements. The IC also features a gate drive for an external N-channel MOSFET, which acts as the series pass device, providing an efficient means of controlling the inrush current.

In conclusion, the LTC1643L-1CGN from Linear Technology is a robust, feature-rich Hot Swap controller that ensures safe and reliable power management for systems that require hot insertion and removal capabilities. Its combination of protection features and adjustable parameters make it a versatile solution for managing inrush currents in a variety of electronic applications.