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Fairchild FDB8444 FDB8444 User's Manual

Summary

The FDB8444 is a high-power, automotive-grade N-Channel PowerTrench MOSFET engineered for reliable switching in critical power management circuits. Rated for 40V and 70A, its low on-resistance makes it ideal for vehicular applications such as engine control, powertrain management, and electronic transmissions. This technical datasheet provides comprehensive specifications—including electrical, dynamic, and thermal characteristics alongside AEC Q101 qualifications—for engineers developing robust power supply architectures that meet extreme automotive operating demands.

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Page 1 Text Content

8444 N -C an el P er T ren ch

February 2006

FDB8444 N-Channel Power Trench® MOSFET 40V, 70A, 5.5mΩ Features Applications

TA TIO

Typ r DS(on) = 3.9mΩ at VGS = 10V, ID = 70A Automotive Engine Control

Typ Qg(TOT) = 91n C at VGS = 10V Powertrain Management

Low Miller Charge Solenoid and Motor Drivers

Low Qrr Body Diode Electronic Transmission

UIS Capability (Single Pulse and Repetitive Pulse) Distributed Power Architecture and VRMs

Qualified to AEC Q101 Primary Switch for 12V Systems

Ro HS Compliant

FR EE

SOURCE DRAIN (FLANGE)

TO-263AB FDB SERIES

2006 Fairchild Semiconductor Corporation www.fairchildsemi.com1 DB8444 Rev A2 (W)

Page Summary Contents For Fairchild FDB8444 FDB8444 User's Manual

Page 1 8444 N -C an el P er T ren ch February 2006 FDB8444 N-Channel Power Trench® MOSFET 40V, 70A, 5.5mΩ Features Applications TA TIO Typ r DS(on) = 3.9mΩ at VGS = 10V, ID = 70A Automotive Engine Control Ty...
Page 2 8444 N -C an el P er T ren ch Absolute Maximum Ratings TC = 25°C unless otherwise noted Symbol Parameter Ratings Units VDSS Drain to Source Voltage VGS Gate to Source Voltage ± 20 Drain Current Contin...
Page 3 8444 N -C an el P er T ren ch Electrical Characteristics TJ = 25°C unless otherwise noted Symbol Parameter Test Conditions Min Typ Max Units Switching Characteristics t(on) Turn-On Time ns td(on) Turn...
Page 4 8444 N -C an el P er T ren ch Typical Characteristics , P EA EN (A LI ZE ER PO ER IS SI PA TI LI PL IE IM PE E, θJ CURRENT LIMITED VGS = 10V BY WIRE TC, CASE TEMPERATURE(o C) TC, CASE TEMPERATURE(o C)...
Page 5 8444 N -C an el P er T ren ch Typical Characteristics S( on IN , D IN EN (A , D IN EN (A -R ES IS TA (m If R = 0 10us t AV = (L)(IAS)/(1.3*RATED BVDSS - VDD) If R ≠ 0 t AV = (L/R)ln[(IAS*R)/(1.3*RATED...
Page 6 8444 N -C an el P er T ren ch Typical Characteristics LI ZE TE PA IT (p F) TH ES LD LT VGS = VDS ID = 250µA ID = 250µA TJ, JUNCTION TEMPERATURE(o C) TJ, JUNCTION TEMPERATURE (o C) Figure 11. Normalize...
Page 7 8444 N -C an el P er T ren ch TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of a...

Manual Details

Brand Fairchild
Pages 7
File Size 310.94 KB
Published July 07, 2026
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