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FDS6984S

By datasheet - April 3rd, 2008

FDS6984S

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FDS6984S

September 2000

FDS6984S
Dual Notebook Power Supply N-Channel PowerTrench SyncFETTM
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. Q2 also includes an integrated Schottky diode using Fairchild s monolithic SyncFET technology.

Features
Q2: Optimized to minimize conduction losses Includes SyncFET Schottky diode RDS(on) 19 m VGS 10V RDS(on) 28 m VGS 4.5V Q1: Optimized for low switching losses Low gate charge ( 5 nC typical) RDS(on) 0.040 VGS 10V RDS(on) 0.055 VGS 4.5V

8.5A, 30V

5.5A, 30V

D1 D1 D2 D2 S1 G1

5 6 7
Q1

4 3 2
Q2

SO-8
S2

8

1

G2

Absolute Maximum Ratings
Symbol
VDSS VGSS ID PD Drain-Source Voltage Gate-Source Voltage Drain Current

TA 25 C unless otherwise noted

Parameter

Q2
30
(Note 1a)

Q1
30 20 5.5 20 2 1.6 1 0.9 -55 to 150

Units
V V A W

- Continuous - Pulsed Power Dissipation for Dual Operation Power Dissipation for Single Operation

20 8.5 30

(Note 1a) (Note 1b) (Note 1c)

TJ, TSTG

Operating and Storage Junction Temperature Range

C

Thermal Characteristics
RJA RJC Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case
(Note 1a) (Note 1)

78 40

C/W C/W

Package Marking and Ordering Information
Device Marking FDS6984S Device FDS6984S Reel Size 13" Tape width 12mm Quantity 2500 units

2000 Fairchild Semiconductor Corporation

FDS6984S Rev C(W)

FDS6984S Datasheet Fairchild Download PDF

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