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IRLL3303

IRLL3303 Description

The IRLL3303 by Infineon Technologies is an N-channel HEXFET® MOSFET designed for efficient power management in compact, surface-mount applications. With a 30V drain-to-source voltage (Vdss) and 4.6A continuous drain current (Id), this MOSFET is optimized for low-voltage, high-current switching. It features a low on-resistance (Rds On) of 31mOhm at 10V Vgs, ensuring minimal power loss and improved thermal performance. The device operates with a gate threshold voltage (Vgs(th)) as low as 1V, making it compatible with low-drive-voltage circuits. Packaged in SOT-223, it balances power handling and space efficiency, though it is now marked as obsolete by the manufacturer.

IRLL3303 Features

• Low Rds On: 31mOhm @ 4.6A, 10V for reduced conduction losses.
• Fast Switching: Gate charge (Qg) of 50nC @ 10V and input capacitance (Ciss) of 840pF @ 25V enable high-frequency operation.
• Robust Design: ±16V maximum gate-source voltage (Vgs) and 1W power dissipation (Ta) ensure reliability.
• Surface-Mount Ready: SOT-223 package suits automated assembly and space-constrained PCBs.
• Compliance: REACH unaffected, MSL 1 (unlimited shelf life), and EAR99/ECCN for global usability.

IRLL3303 Applications

Ideal for DC-DC converters, load switches, and battery management systems, the IRLL3303 excels in:

• Portable Electronics: Low-voltage power distribution in smartphones/tablets.
• Motor Control: Driver stages for small brushed DC motors.
• Power Supplies: Synchronous rectification in 12V/24V SMPS.
• Automotive Auxiliary Systems: LED drivers or infotainment power switches (within 30V limits).

Conclusion of IRLL3303

While obsolete, the IRLL3303 remains a viable choice for designs prioritizing low Rds On, compact packaging, and efficient switching. Its HEXFET® technology and Infineon’s legacy reliability make it suitable for legacy or cost-sensitive projects. Engineers should evaluate alternatives for new designs but may leverage existing stock for repairs or low-volume production.