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FDS6984S Datasheet Dual Notebook Power Supply N-channel Powertrench Syncfet

Manufacturer: Fairchild (now onsemi)

Overview: FDS6984S May 2000 PRELIMINARY FDS6984S Dual Notebook Power Supply N-Channel PowerTrench® SyncFET.

General Description

The FDS6984S is designed to replace two single SO-8 MOSFETs and Schottky diode in synchronous DC:DC power supplies that provide various peripheral voltages for notebook computers and other battery powered electronic devices.

FDS6984S contains two unique 30V, N-channel, logic level, PowerTrench MOSFETs designed to maximize power conversion efficiency.

The high-side switch (Q1) is designed with specific emphasis on reducing switching losses while the lowside switch (Q2) is optimized to reduce conduction losses.

Key Features

  • Q2: Optimized to minimize conduction losses Includes SyncFET Schottky diode RDS(on) = 0.019Ω @ VGS = 10V RDS(on) = 0.027Ω @ VGS = 4.5V.
  • Q1: Optimized for low switching losses Low gate charge ( 5 nC typical) RDS(on) = 0.040Ω @ VGS = 10V RDS(on) = 0.055Ω @ VGS = 4.5V 8.5A, 30V 5.5A, 30V 5 6 7 Q2 Q1 4 3 2 1 8 Absolute Maximum Ratings Symbol VDSS VGSS ID PD Drain-Source Voltage Gate-Source Voltage Drain Current - Continuous - Pulsed T A = 25°C unless otherwise noted Parame.

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