Infineon AUIRF7749L2TR: A High-Performance Automotive MOSFET Power Switch

In the rapidly evolving landscape of automotive electronics, the demand for robust, efficient, and reliable power switching solutions is paramount. The Infineon AUIRF7749L2TR stands out as a premier N-channel power MOSFET engineered specifically to meet the rigorous demands of modern vehicle applications. This device exemplifies the integration of advanced semiconductor technology with automotive-grade resilience, making it a critical component in systems ranging from engine management and braking to advanced driver-assistance systems (ADAS) and comfort features.

A key attribute of the AUIRF7749L2TR is its exceptionally low on-state resistance (RDS(on)), which is rated at a mere 0.55 mΩ typical. This ultra-low resistance is a cornerstone of its high-performance profile, as it directly translates to minimized conduction losses during operation. The result is significantly improved energy efficiency, reduced heat generation, and the ability to handle high continuous drain currents (ID) up to 390 A. This capability is essential for managing the substantial power requirements found in automotive environments, such as driving solenoids, motors, and heavy-duty lamp loads.

Beyond raw power handling, this MOSFET is designed for superior switching performance. Its optimized gate charge ensures fast switching speeds, which is crucial for high-frequency applications like switch-mode power supplies (SMPS) within vehicles. This speed contributes to higher system efficiency and allows for the design of smaller, more compact magnetic components.

Robustness and reliability are non-negotiable in the automotive sector, and the AUIRF7749L2TR is built to exceed expectations. It is qualified according to the stringent AEC-Q101 standard, guaranteeing its performance across the automotive temperature range (-55 °C to +175 °C). The device also offers outstanding avalanche ruggedness, meaning it can withstand energy spikes and unclamped inductive switching (UIS) events that are common in the electrically noisy environment of an automobile. This intrinsic ruggedness protects both the switch and the broader electronic system from potential damage, enhancing overall longevity.

Housed in an Advanced PQFN 5x6mm package, the MOSFET offers an excellent power-to-size ratio. The package features an exposed cooling pad that provides very low thermal resistance, enabling highly efficient heat dissipation away from the silicon die. This is critical for maintaining performance and preventing thermal runaway in space-constrained under-the-hood applications.

ICGOODFIND: The Infineon AUIRF7749L2TR is a top-tier automotive MOSFET that masterfully combines ultra-low resistance, high current capability, and exceptional durability. Its AEC-Q101 qualification and advanced packaging make it an indispensable and highly reliable solution for designers tackling the most demanding automotive power switching challenges, ensuring both peak performance and long-term system integrity.

Keywords:

Automotive MOSFET

Low RDS(on)

AEC-Q101 Qualified

High Current Capability

Avalanche Rugged