Infineon IRFR5305TRPBF N-Channel MOSFET: Key Specifications and Application Circuits

The Infineon IRFR5305TRPBF is a widely used N-channel power MOSFET that leverages advanced silicon technology to deliver high efficiency and robustness in a variety of switching applications. As a member of the HEXFET® family, it is designed for low on-state resistance and fast switching speeds, making it an ideal choice for power management tasks in consumer electronics, industrial systems, and automotive applications.

Key Specifications

The standout features of the IRFR5305TRPBF are defined by its critical electrical characteristics. It is designed with a drain-source voltage (Vds) of 55V, allowing it to handle a significant voltage range in standard power circuits. Its continuous drain current (Id) is 31A, which provides ample current-carrying capability for motor drives, power supplies, and load switches. A crucial factor in its efficiency is its exceptionally low on-state resistance (Rds(on)) of just 0.022Ω (max) at a gate-source voltage of 10 V. This low resistance minimizes conduction losses, leading to less heat generation and higher overall system efficiency.

The device is housed in a surface-mount DPAK (TO-252) package, which offers a good balance between power handling and board space savings. Its threshold voltage (Vgs(th)) is typically 2-4V, making it compatible with both 5V and 12V logic-level drive circuits, though for full enhancement, a gate drive of 10V is recommended.

Application Circuits

1. Synchronous Buck Converter:

The IRFR5305TRPBF is frequently employed as the low-side switch in synchronous buck regulators. Its low Rds(on) is critical here, as it directly reduces power loss during the freewheeling phase of the switching cycle, improving the converter's efficiency, especially under high-load conditions.

2. Motor Control H-Bridge:

In DC motor control circuits, typically arranged in an H-bridge configuration, two IRFR5305TRPBF MOSFETs can be used for the low-side switches. Their high current rating allows them to handle the large current required by motors, while fast switching enables pulse-width modulation (PWM) for precise speed control.

3. Load Switch:

The MOSFET can serve as a simple yet effective high-side load switch. By driving the gate with a microcontroller (often through a gate driver IC for fast switching), it can connect or disconnect power to a load, protecting circuits from inrush currents or providing power sequencing.

4. Solid-State Relay (SSR) Replacement:

For switching AC or DC loads, the IRFR5305TRPBF can be used to create a more efficient and longer-lasting alternative to electromechanical relays. When driven by an optocoupler, it provides complete galvanic isolation between the control logic and the powered load.

ICGOODFIND In summary, the Infineon IRFR5305TRPBF stands out as a highly reliable and efficient power MOSFET. Its optimal blend of a 55V voltage rating, 31A current capability, and remarkably low 0.022Ω on-resistance makes it a versatile solution for designers seeking to optimize performance in power conversion and switching applications.

Keywords: Power MOSFET, Low On-Resistance, Switching Applications, Buck Converter, Motor Control