**LT4363IDE-2#PBF: A High Voltage Surge Stopper with Ideal Diode Controller**

In the realm of power management for automotive, industrial, and aviation systems, electrical transients and voltage surges pose a constant threat to sensitive downstream circuitry. The **LT4363IDE-2#PBF** from Analog Devices stands as a robust solution, engineered to protect loads from high-voltage surges and negative voltage transients while also providing ideal diode functionality to prevent reverse current flow.

This innovative device operates as a **high-voltage surge stopper**, regulating the output voltage during overloads by controlling the gate of an external N-channel MOSFET. Its wide operating range, from **4V to 80V**, with absolute maximum ratings extending to 100V, makes it exceptionally suited for harsh electrical environments commonly found in 12V and 24V automotive and truck systems. The core protection mechanism involves continuously monitoring the voltage across an external sense resistor. Should an overcurrent condition be detected, the IC adjusts the gate voltage to maintain a constant current limit, thereby safeguarding the load.

A key feature of the LT4363IDE-2#PBF is its **integrated ideal diode controller**. This function drives a second external MOSFET to emulate a near-perfect diode, significantly reducing the voltage drop and power loss associated with a conventional Schottky diode. This is critical for **ORing applications** in redundant power supplies or for providing reverse input protection, ensuring uninterrupted and efficient power delivery.

The device offers exceptional flexibility and precision. The overvoltage (OV) and undervoltage (UV) fault thresholds are easily set via external resistor dividers, allowing designers to tailor the protection window to their specific needs. Furthermore, the part includes a programmable fault timer. If an overcurrent or overvoltage condition persists beyond a set period, the IC promptly shuts down the external MOSFET and enters a retry mode, attempting to restart only after the fault has cleared, thus ensuring robust latch-up-free operation.

Housed in a compact 12-lead DFN package, the **LT4363IDE-2#PBF** delivers a high level of integration and reliability for space-constrained applications. Its ability to combine surge stopping and ideal diode control simplifies board design and enhances system resilience against the unpredictable nature of real-world power buses.

**ICGOOODFIND:** The LT4363IDE-2#PBF is an indispensable guardian for electronic systems exposed to volatile power conditions. It masterfully integrates **high-voltage surge protection** with **efficient ideal diode operation**, offering designers a single, compact IC to solve two critical challenges: ensuring safe operation during transients and maximizing power efficiency with minimal voltage drop.

**Keywords:** Surge Stopper, Ideal Diode Controller, Overvoltage Protection, Reverse Current Protection, High Voltage