LTC4350IGN#PBF

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LTC4350IGN#PBF, categorised under PMIC - Hot Swap Controllers, is used in applications where it is necessary to provide power to a system under varying conditions. The device’s hot-swapping abilities prevent a system from being completely powered down, thereby allowing a battery backup system — such as a UPS — to remain operational for a longer amount of time. In addition, the device allows for the safe hot-swapping of a system without compromising system integrity.

The device is a low dropout linear regulator integrated with a hot-swap controller and is available in a space-saving, 10-pin MSOP package. The device operates from an input voltage up to 22V, with an adjustable output voltage from 0.6V to 15V. It features a fast, current limit-controlled turn-on and an adjustable current-limit threshold. It also has an overtemperature shutdown, overvoltage protection, and reverse-current protection.

In normal operation, the LTC4350IGN#PBF ensures that the desired output voltage is provided while the host system’s power is cycled on and off. During a hot swap, the device prevents the system from experiencing a large output inrush current, which could potentially damage or destroy the system’s power supply. In addition, the device maintains full system power as long as possible, ensuring that a system’s memory and other peripheral components remain fully operational.

The LTC4350IGN#PBF is voltage-mode controlled, meaning that it is responsible for both setting the output voltage and monitoring the output voltage. All the necessary information to set and monitor the output voltage is supplied by an external voltage reference and two resistors. In addition, an external voltage sense resistor is used to monitor the output voltage.

Under normal operation, the device monitors both the input and output voltages, adjusting the current delivery to ensure that the desired output voltage is supplied. If the voltage exceeds the allowable maximum, the device will shut down. In addition, the device monitors the output current and will shut down if the current exceeds the user-defined current limit.

In the event of an overtemperature shutdown, the LTC4350IGN#PBF automatically reduces the current delivery to protect the system. It will also reduce the current delivery when the input voltage drops under the permissible minimum. The device also has reverse current protection, which ensures that when the input voltage drops below the output voltage, current delivery from the output to the input is prevented.

The LTC4350IGN#PBF is ideal for hot-swap applications where it is important to have a device that can protect the host system from large inrush currents and supply full system power as long as possible. It is also a cost-effective solution, since only two resistors are required to set and monitor the output voltage.

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