LTC4218CGN#PBF

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The LTC4218CGN#PBF is a hot swap controller that enables a board to be safely inserted and removed from a live system. It is designed to prevent system failures due to hot-swapping while allowing full control of inrush current. The LTC4218CGN#PBF has on-board power-good output, inrush current limiting, and overtemperature protection to enable safe hot-swap control of power converters.

The LTC4218CGN#PBF is suitable for applications such as PC Card slots, PCI slots, power supplies, and hot-swap controllers. It has a single GPIO pin that can be used to enable or disable hot swapping of power converters. It also has several programmable features, including inrush current limit, power good output, and over-temperature protection. The device comes in a leadless 8-pin TSOT23 package and is rated for operation over the -40C to +85C temperature range.

The LTC4218CGN#PBF\'s hot-swap control circuit monitors the input voltage and sensed current on the VIN pin and the onboard temperature sensor. When the input voltage exceeds the VUVLO (Under Voltage Lock Out) threshold, the device turns on an external N-channel MOSFET connected between IN and VIN. When the voltage reaches the VHV (High Voltage) threshold, the hot-swap control circuit turns on a second external FET connected between OUT and VIN.When the input current exceeds the programmed current limit, the device turns off the main switch, but leaves the OUT FET enabled.

The LTC4218CGN#PBF also features over-temperature protection. When the temperature exceeds the programmed temperature limit, the device turns off the main switch and the OUT FET and the PG pin is driven low. The device can be re-enabled after the temperature has dropped below the programmed temperature limit.

Other features of the LTC4218CGN#PBF include an adjustable soft start and an adjustable slew-rate control of the switches. It also features a wide input voltage range from 2.5V to 52V and a wide operating temperature range from -40C to +85C.

The LTC4218CGN#PBF offers a reliable and robust hot-swap control solution for applications requiring inrush current limitation, power good monitoring, and over-temperature protection. It is an ideal fit for applications such as PC Card slots, PCI slots, power supplies, and hot-swap controllers.

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