FDS9945 Fairchild Semiconductor, FDS9945 Datasheet
FDS9945
Manufacturer Part Number
FDS9945
Description
MOSFET N-CH 60V 3.5A SO-8
Manufacturer
Fairchild Semiconductor
Series
PowerTrench®r
Datasheet
1.FDS9945.pdf
(5 pages)
Specifications of FDS9945
Fet Type
2 N-Channel (Dual)
Fet Feature
Logic Level Gate
Rds On (max) @ Id, Vgs
100 mOhm @ 3.5A, 10V
Drain To Source Voltage (vdss)
60V
Current - Continuous Drain (id) @ 25° C
3.5A
Vgs(th) (max) @ Id
3V @ 250µA
Gate Charge (qg) @ Vgs
13nC @ 5V
Input Capacitance (ciss) @ Vds
420pF @ 30V
Power - Max
1W
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Configuration
Dual Dual Drain
Transistor Polarity
N-Channel
Resistance Drain-source Rds (on)
0.1 Ohm @ 10 V
Forward Transconductance Gfs (max / Min)
8.6 S
Drain-source Breakdown Voltage
60 V
Gate-source Breakdown Voltage
+/- 20 V
Continuous Drain Current
3.5 A
Power Dissipation
2000 mW
Maximum Operating Temperature
+ 175 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 55 C
Continuous Drain Current Id
3.5A
Drain Source Voltage Vds
60V
On Resistance Rds(on)
100mohm
Rds(on) Test Voltage Vgs
10V
Threshold Voltage Vgs Typ
2.5V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
FDS9945
FDS9945TR
FDS9945TR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
FDS9945
Manufacturer:
Fairchild Semiconductor
Quantity:
63 623
Part Number:
FDS9945
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Company:
Part Number:
FDS9945-NL
Manufacturer:
FAIRCHILD
Quantity:
12 650
Part Number:
FDS9945-NL
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
FDS9945
60V N-Channel PowerTrench MOSFET
General Description
These N Channel Logic Level MOSFET have been
designed specifically to improve the overall efficiency of
DC/DC converters using either synchronous or
conventional switching PWM controllers.
The MOSFET feature faster switching and lower gate
charge than other MOSFET with comparable RDS(on)
specifications.
The result is a MOSFET that is easy and safer to drive
(even at very high frequencies), and DC/DC power
supply designs with higher overall efficiency.
2001 Fairchild Semiconductor Corporation
Absolute Maximum Ratings
Symbol
V
V
I
P
T
Thermal Characteristics
R
R
R
Package Marking and Ordering Information
D
D
J
DSS
GSS
, T
JA
JA
J C
Device Marking
STG
FDS9945
SO-8
Drain-Source Voltage
Gate-Source Voltage
Drain Current
Power Dissipation for Single Operation
Operating and Storage Junction Temperature Range
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
Pin 1
D
D2
D
D2
SO-8
D
D1
– Continuous
– Pulsed
D
FDS9945
Device
D1
Parameter
S2
S
G2
S
S1
S
G1
T
G
A
=25
o
C unless otherwise noted
Reel Size
13’’
(Note 1a)
(Note 1a)
(Note 1b)
(Note 1c)
(Note 1a)
(Note 1c)
(Note 1)
Features
3.5 A, 60 V.
Optimized for use in switching DC/DC converters
with PWM controllers
Very fast switching
Low gate charge.
78 (steady state), 50 (10 sec)
5
6
7
8
Tape width
R
R
DS(ON)
DS(ON)
-55 to +175
Q1
Q2
12mm
Ratings
135
3.5
1.6
1.0
60
10
40
20
2
= 0.100
= 0.200
February 2001
@ V
@ V
4
3
2
1
GS
GS
FDS9945 Rev B(W)
2500 units
Quantity
= 10 V
= 4.5V
Units
C/W
C/W
C/W
W
V
V
A
C
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Datasheet:
FDS9945 Summary of contents
Page 1
... Reel Size 13’’ February 2001 R = 0.100 @ DS(ON 0.200 @ V = 4.5V DS(ON Ratings Units 3 1.6 1.0 -55 to +175 C C/W 135 C/W 40 C/W Tape width Quantity 12mm 2500 units FDS9945 Rev B(W) ...
Page 2
... Min Typ Max Units 60 V 62.5 mV 100 nA –100 –6 mV 100 m 103 200 126 170 10 A 8.6 S 420 4.3 8 2.5 nC 2.1 A 0.8 1.2 V (Note 2) c) 135°/W when mounted on a minimum pad. FDS9945 Rev B(W) A ...
Page 3
... Figure 6. Body Diode Forward Voltage Variation with Source Current and Temperature. = 4.0V 4.5V 5.0V 6.0V 10V DRAIN CURRENT ( 1.75A 125 GATE TO SOURCE VOLTAGE (V) GS Gate-to-Source Voltage 125 -55 C 0.2 0.4 0.6 0 BODY DIODE FORWARD VOLTAGE (V) SD FDS9945 Rev B( 1.2 ...
Page 4
... Figure 10. Single Pulse Maximum 0.01 0 TIME (sec 1MHz ISS C OSS DRAIN TO SOURCE VOLTAGE (V) DS SINGLE PULSE R = 135°C 25°C A 0.01 0 TIME (sec) 1 Power Dissipation. R ( 135 °C P(pk ( Duty Cycle 100 1000 FDS9945 Rev B(W) 30 100 ...
Page 5
... TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ACEx™ FASTr™ Bottomless™ GlobalOptoisolator™ CoolFET™ GTO™ CROSSVOLT™ HiSeC™ DOME™ ISOPLANAR™ ...