NXP BUK9Y8R5-80EX: A High-Performance Automotive TrenchMOS Power MOSFET

The relentless drive towards vehicle electrification, advanced driver-assistance systems (ADAS), and sophisticated onboard electronics demands power switching components that deliver exceptional efficiency, reliability, and robustness. Addressing these critical needs, the NXP BUK9Y8R5-80EX stands out as a premier Automotive TrenchMOS Power MOSFET engineered to set a new benchmark in performance for demanding automotive applications.

This device is optimized for high-power switching tasks, featuring an impressively low typical on-resistance (RDS(on)) of just 0.8 mΩ at a gate voltage of 10 V. This ultra-low resistance is a key figure of merit, as it directly translates to minimized conduction losses and superior thermal performance. By dissipating less power as heat, the MOSFET enables higher efficiency in systems like electric power steering (EPS), brake systems, and DC-DC converters, contributing to extended driving range in electric vehicles and reduced fuel consumption in traditional powertrains.

Engineered for the rigorous automotive environment, the BUK9Y8R5-80EX is AEC-Q101 qualified, ensuring it meets the stringent reliability standards required for automotive components. Its construction is designed to withstand the high transient voltages common in 12 V and 48 V automotive systems. Furthermore, it boasts an exceptional avalanche ruggedness, providing an added layer of protection against unexpected voltage spikes and inductive load dump events, which are critical for maintaining system integrity and safety.

The MOSFET utilizes NXP’s advanced TrenchMOS technology. This process achieves an optimal balance between low on-resistance and gate charge (Qg), which is vital for high-efficiency switching at high frequencies. This makes it an ideal choice for high-frequency switch-mode power supplies (SMPS) within infotainment and ADAS domains, where space is limited and thermal management is challenging.

Housed in a superior LFPAK 56 (SOT1252) package, this MOSFET offers a compact footprint with outstanding power density. The package’s design enhances thermal dissipation, allowing for higher continuous and pulsed drain current (ID) handling in a smaller space compared to older package types like the D2PAK.

ICGOODFIND: The NXP BUK9Y8R5-80EX is a top-tier solution for designers building the next generation of automotive systems. Its combination of ultra-low RDS(on), high avalanche ruggedness, AEC-Q101 qualification, and advanced packaging makes it a robust and highly efficient choice for a wide array of demanding power control applications, from powertrain to safety systems.

Keywords: Automotive MOSFET, Low RDS(on), AEC-Q101, Avalanche Rugged, LFPAK Package