**LTC4418IUF#TRPBF: A High-Performance Dual Ideal Diode Controller for PowerPath™ ORing and Load Sharing**

In modern electronic systems, ensuring reliable and efficient power delivery is paramount. The **LTC4418IUF#TRPBF** from Analog Devices represents a significant advancement in power management, serving as a **high-performance dual ideal diode controller** designed for sophisticated PowerPath™ ORing and load sharing applications. This integrated circuit (IC) addresses critical challenges in systems with multiple power sources, such as redundant power supplies, battery backup systems, and high-availability servers, where seamless power source transition and load distribution are essential.

The core functionality of the LTC4418IUF#TRPBF lies in its ability to emulate ideal diodes using low-loss N-channel MOSFETs, **drastically reducing voltage drop and power dissipation** compared to traditional Schottky diodes. Each channel controls an external MOSFET to create a near-ideal rectifier with a forward voltage as low as 20mV. This efficiency is crucial for thermal management and extending battery life in portable devices. The device features two independent controllers in a single package, enabling compact designs for dual-power-path systems.

A key application is **PowerPath ORing**, where the IC automatically selects the highest valid voltage from two inputs to power a common load. This provides uninterrupted operation if one source fails or is removed. The fast switchover time minimizes voltage droop, ensuring system stability. Additionally, the LTC4418 excels in **active load sharing**, balancing current between two sources to prevent overloading a single supply. This enhances overall system reliability and allows for the use of smaller, more cost-effective power sources.

The LTC4418IUF#TRPBF incorporates advanced features for robust operation. Its **adjustable current limiting** protects external MOSFETs and the load during fault conditions. The status flags for each channel provide crucial feedback to a system microcontroller, indicating gate validity and the presence of forward current. Housed in a 24-lead 4mm x 4mm QFN package, it offers a compact footprint for space-constrained applications while maintaining excellent thermal performance.

**ICGOODFIND:** The LTC4418IUF#TRPBF is an exceptional solution for designers seeking to implement efficient and reliable power multiplexing. Its dual-channel architecture, minimal power loss, and sophisticated control features make it ideal for a wide range of applications, from telecom and networking infrastructure to industrial and medical equipment, ensuring optimal power integrity and system uptime.

**Keywords:**

Ideal Diode Controller

PowerPath ORing

Load Sharing

N-channel MOSFET

Current Limiting