FDS3812

FET, MOSFET Arrays Overview

The FDS3812 is an N-Channel Dual PowerTrench MOSFET designed to improve DC/DC converter efficiency. It features a drain-source voltage of 80 V and continuous drain current of 3.4 A. The static drain-source on-resistance is 74 mΩ at VGS = 10 V and 84 mΩ at VGS = 6 V. Total gate charge is typically 13 nC. Operating junction temperature ranges from -55°C to +175°C. Thermal resistance junction-to-ambient is 78°C/W on a 1 in² pad.

FET, MOSFET Arrays Feature Summary

• Dual configuration with fast switching speed and low gate charge for high-frequency operation
• High performance trench technology providing extremely low RDS(ON)
• Capable of handling high power and current loads

FET, MOSFET Arrays Applications

• Synchronous switching PWM controllers
• Conventional switching PWM controllers
• DC/DC power supply designs

FET, MOSFET Arrays Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor was acquired by onsemi. Confirm the package marking matches the datasheet specifications. Ensure the component status is active if new production is required. Check for RoHS compliance markings on the reel or tape. Validate the ordering suffix against the specific quantity requirements.

FET, MOSFET Arrays Selection Notes

Select this dual MOSFET when space constraints require two switches in one package. Consider the 80V rating and 3.4A current limit for the load requirements. Evaluate the thermal resistance values against the PCB copper area available. Compare the gate charge specifications against the driving capability of the controller IC.

FET, MOSFET Arrays Part Context

This component belongs to the PowerTrench family of MOSFETs developed by Fairchild Semiconductor. The device utilizes trench technology to achieve low on-resistance. It is packaged in an SO-8 format suitable for surface mount applications. The dual structure integrates two independent N-channel devices.

FET, MOSFET Arrays Replacement Considerations

Check for direct replacements within the onsemi portfolio that maintain the 80V, 3.4A, and SO-8 specifications. Verify pin compatibility and thermal characteristics before substitution.