LTC4358CFE#TRPBF

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The LTC4358CFE#TRPBF is a hot-swap controller integrated circuit. It is classified as a Poly-PhaseDC-DC controller, smart Hot-Swap controller, PMIC - OR Controllers, Ideal Diodes, and ideal regulators. The controller works as a mid-point hot-swap controller and is suitable for grid-tied applications.

The LTC4358CFE#TRPBF is designed to protect sensitive loads primarily while at the same time allowing hot-swapping of their power sources without any of the potential danger. It enables a microprocessor, communications, or embedded controller to safely perform hot-swap operations either manually or automatically. It has integrated safety features to protect the load, including output over-temperature protection, output open load detection, output voltage limits, and short-circuit protection.

The LTC4358CFE#TRPBF control circuit consists of two control loops. The inner loop is a voltage loop and it regulates the voltage from its main rectifier supply. It has two levels of regulation. First, it measures the current from the main supply, and then it adjusts the output of the main rectifier to maintain the output voltage within 450mV of the programmed value. Then, the rectifier drives the external P-channel MOSFET to the optimal gate threshold voltage, which provides the minimum gate to drain capacitance.

The outer loop is a current loop. It uses a high speed comparator to detect current flow in the system. When current flow is detected, the comparator turns on the gate to the P-channel MOSFET, connecting the main rectifier to the output load. The top FET gate voltage is adjusted to ensure safe operation and protection from shorts to ground. Once the voltage is reached, the current loop switches on the FET and completes the current flow to the load.

The LTC4358CFE#TRPBF features a slew rate control function which can be used to limit the inrush current by increasing the gate to source time. It also has an adjustable current limit and cycle-by-cycle current limiting, providing additional protection against over-current. The over-current protection can be adjusted through the current limit pins.

The LTC4358CFE#TRPBF is designed to optimize the balance between inrush current and control loop latency. It features very low offset voltage and minimal voltage droop, making it ideal for grid-tied applications. Its hot-swap control circuit eliminates the need for an extra load switch to disconnect the supply. Its ideal diode architecture eliminates the traditional power losses associated with Schottky diodes and MOSFETs.

The LTC4358CFE#TRPBF is also compatible with I2C, SMBus, and general-purpose serial interfaces for communication. It works on a wide operating range of 8V to 40V, with a switching frequency of up to 800kHz. It has a maximum of 3A nominal current, and offers output voltage ranging from 1V to 18V.

The LTC4358CFE#TRPBF application field is mainly used in Industrial, Embedded, Automotive, and Measurement Applications. It offers features such as overcurrent protection and hot-swap capabilities. Its ideal diode architecture and low power loss makes it ideal for grid-tied applications. It is also suitable for use with I2C, SMBus, and general-purpose serial interfaces.

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