NXP BUK9620-100B,118: 100V Logic Level N-Channel Power MOSFET Datasheet Overview and Application Notes
The NXP BUK9620-100B,118 is a logic-level N-channel power MOSFET engineered using TrenchMOS technology, designed to deliver high efficiency and robust performance in a compact package. This device is optimized for applications requiring low gate-drive voltage and low on-state resistance, making it an excellent choice for modern power switching circuits where board space and energy efficiency are at a premium.
A primary highlight of this MOSFET is its ability to be driven directly from standard 5V or 3.3V microcontroller outputs, eliminating the need for an additional gate-driver IC in many designs. With a maximum drain-source voltage (Vds) of 100V and a continuous drain current (Id) of 35A, it is capable of handling significant power levels. Its key performance metric, the on-state resistance (Rds(on)), is exceptionally low, typically <18 mΩ at 10V gate-source voltage (Vgs) and <23 mΩ at just 4.5V Vgs. This low Rds(on) directly translates to reduced conduction losses and higher overall system efficiency, as less power is dissipated as heat.
The device is offered in the space-efficient LFPAK88 (Power-SO8) package, which provides superior thermal performance and power density compared to standard SO-8 packages. This makes it suitable for high-current applications in confined spaces. Furthermore, it features low intrinsic capacitances and a fast switching speed, which are critical for minimizing switching losses in high-frequency circuits like switch-mode power supplies (SMPS) and motor controllers.
Application Notes and Circuit Considerations:
For optimal performance, careful attention must be paid to the PCB layout and gate driving. Minimizing parasitic inductance in the drain and source loops is crucial to suppress voltage spikes and prevent potential device overvoltage. Although it is a logic-level device, ensuring a strong, fast gate drive signal with adequate peak current is still recommended for very high-frequency switching to avoid slow transition times that increase power loss. For motor control or inductive load applications, the use of appropriate flyback diodes or snubber circuits is essential to protect the MOSFET from voltage transients generated when the inductive current is interrupted. Adequate heatsinking must also be provided, especially when operating near maximum current ratings, to keep the junction temperature within safe limits.
ICGOO FIND: The NXP BUK9620-100B,118 is a highly efficient and compact power switching solution, ideal for automotive, industrial, and computing applications such as DC-DC converters, motor drives, and load switches, where its combination of low gate drive requirements, low Rds(on), and high current capability offers a significant performance advantage.
Keywords: Logic-Level MOSFET, Low Rds(on), 100V, TrenchMOS Technology, LFPAK88 Package.
