NCP339AFCT2G

Overview

The NCP339AFCT2G is a high-side MOSFET load switch manufactured by onsemi, designed for efficient power distribution in portable electronics. It features a PMOS structure with an integrated discharge path to minimize leakage current when disabled. The device supports an input voltage range of 1.2V to 5.5V and delivers a continuous output current of 3A. Key electrical parameters include a maximum on-resistance of 40mΩ at V_IN=4.5V and a typical quiescent current of 0.6μA. The component operates within a temperature range of -40°C to +85°C and is housed in a compact WLCSP-6 package measuring 1mm x 1.5mm.

Feature Summary

• Integrates a PMOS power switch with a dedicated discharge path for rapid output capacitor discharge upon shutdown.
• Provides automatic reverse current blocking to prevent backflow from the output to the input source.
• Features a logic-controlled enable pin that allows direct interface with standard digital logic levels.
• Utilizes a wafer-level chip-scale package to maximize board space efficiency in dense designs.

Applications

• Battery-powered portable devices requiring optimized power management
• Load switching in mobile communication equipment
• Power distribution networks in consumer electronics
• Systems needing isolation of unused ICs to reduce standby current

Procurement Notes

Verify the specific suffix 'A' against the official onsemi datasheet to confirm the exact tape-and-reel quantity and packaging configuration. Ensure the ordering part number matches the required temperature grade and package variant. Cross-reference the manufacturer's latest documentation for any updates regarding RoHS compliance status or recommended landing pad patterns for the WLCSP-6 footprint.

Selection Notes

Select this component when a 3A current capacity is required alongside minimal static power consumption. The low on-resistance makes it suitable for applications where voltage drop across the switch must be minimized. Consider the WLCSP-6 package constraints for thermal dissipation and PCB layout requirements compared to larger packages.

Part Context

This part belongs to the NCP339 series of load switches, which are engineered for high-efficiency power gating. The series is characterized by its ability to handle significant currents while maintaining a very small physical footprint. It serves as a critical component for managing power rails in systems where battery life and space are primary design constraints.

Replacement Considerations

Consult the onsemi product selection guide for alternative parts within the NCP33x family that may offer different current ratings or package options. Verify compatibility with existing PCB footprints if substituting with other load switch variants.