**LTC4364IDE-2#TRPBF: A High-Voltage Surge Stopper for Robust Overvoltage and Overcurrent Protection**

In today's complex electronic systems, safeguarding sensitive circuitry from destructive voltage transients and fault conditions is paramount. The **LTC4364IDE-2#TRPBF** from Analog Devices stands as a robust and highly integrated solution, engineered to protect downstream components by seamlessly regulating the supply input during overvoltage (OV) and overcurrent (OC) events. This surge stopper represents a critical defense mechanism in applications ranging from automotive and industrial systems to telecommunications infrastructure.

**Core Functionality and Operation**

The LTC4364IDE-2#TRPBF is a **monolithic surge stopper controller** that operates over a wide input voltage range from 4V to 80V, with versions capable of handling transients up to 100V. Its primary function is to **protect loads from high-voltage surges** by controlling an external N-channel MOSFET in a linear mode, effectively acting as a high-speed, programmable voltage regulator. When the input voltage exceeds a user-defined overvoltage threshold, the IC rapidly modulates the gate of the MOSFET to maintain a safe, clamped output voltage, preventing harmful energy from reaching the load.

Simultaneously, it provides precise **overcurrent protection (OCP)** by monitoring the voltage drop across an external sense resistor. In the event of a short circuit or excessive current draw, the device limits the current to a preset level, protecting both the load and the series MOSFET. The -2 variant features a **foldback current limiting** function, which reduces the current under short-circuit conditions, thereby minimizing thermal stress and dissipation in the MOSFET.

**Key Features and Advantages**

* **Wide Operating Range:** Its ability to handle inputs up to 80V (100V transient) makes it suitable for demanding 12V, 24V, and 48V systems commonly found in automotive, industrial, and avionics applications.

* **Adjustable Protection Thresholds:** The OV and OC trip points are easily set using external resistors, providing design flexibility for various system requirements.

* **Fast Response Time:** The IC reacts to overvoltage events in **less than 1μs**, ensuring unparalleled protection for even the most sensitive integrated circuits.

* **Reverse Input Protection:** The design inherently protects against negative input voltages down to -40V, a common threat in automotive environments.

* **Robust Package:** The device is offered in a compact 14-Lead DFN package, ideal for space-constrained PCB designs while ensuring excellent thermal performance.

**Application Scenarios**

The LTC4364IDE-2#TRPBF is indispensable in any scenario where a stable power bus is susceptible to unpredictable spikes and faults. Key applications include:

* **Automotive Electronics:** Protecting infotainment systems, ECUs, and ADAS modules from load-dump and jump-start events.

* **Industrial Control Systems:** Safeguarding PLCs, sensors, and communication modules in harsh electrical environments.

* **Telecommunications and Networking Equipment:** Providing front-end protection for servers, routers, and base station cards hot-swapped into 48V backplanes.

**ICGOODFIND**

In summary, the **LTC4364IDE-2#TRPBF** is an exceptionally versatile and reliable high-voltage surge stopper. It offers a comprehensive and **robust protection scheme**, integrating critical overvoltage and overcurrent protection features into a single, efficient solution. Its wide input range, fast response, and configurable thresholds make it an superior choice for designers aiming to enhance system reliability and longevity in the face of real-world power anomalies.

**Keywords:**

1. Surge Stopper

2. Overvoltage Protection (OVP)

3. Overcurrent Protection (OCP)

4. High-Voltage Controller

5. Load Protection