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Si7940DP
Vishay Siliconix
Dual N-Channel 12-V (D-S) MOSFET
PRODUCT SUMMARY
FEATURES
V DS (V)
12
R DS(on) ( Ω )
0.017 at V GS = 4.5 V
0.025 at V GS = 2.5 V
I D (A)
11.8
9.8
? Halogen-free According to IEC 61249-2-21
Available
? TrenchFET ? Power MOSFET
? New Low Thermal Resistance PowerPAK ?
Package with Low 1.07 mm Profile
? PWM Optimized
? 100 % R g Tested
PowerPAK SO-8
APPLICATIONS
? Point-of-Load Synchronous Rectifier
6.15 mm
1
S1
2
G1
3
S2
5.15 mm
G2
- 5 V or 3.3 V BUS Step Down
- Q g Optimized for 500 kHz and Operation
? Synchronous Buck Shoot-Through Resistant
8
D1
D1
4
D 1
D 2
7
D2
6
D2
5
Bottom View
Ordering Information: Si7940DP-T1-E3 (Lead (Pb)-free)
Si7940DP-T1-GE3 (Lead (Pb)-free and Halogen-free)
G 1
S 1
N-Channel MOSFET
G 2
S 2
N-Channel MOSFET
ABSOLUTE MAXIMUM RATINGS T A = 25 °C, unless otherwise noted
Parameter
Drain-Source Voltage
Gate-Source Voltage
Symbol
V DS
V GS
10 s
12
±8
Steady State
Unit
V
Continuous Drain Current (T J = 150 °C) a
Pulsed Drain Current
T A = 25 °C
T A = 70 °C
I D
I DM
11.8
9.5
20
7.6
6.1
A
Continuous Source Current (Diode Conduction) a
I S
2.9
1.1
Maximum Power Dissipation a
Operating Junction and Storage Temperature Range
Soldering Recommendations (Peak Temperature) b, c
T A = 25 °C
T A = 70 °C
P D
T J , T stg
3.5
2.2
- 55 to 150
260
1.4
0.9
W
°C
THERMAL RESISTANCE RATINGS
Parameter
Symbol
Typical
Maximum
Unit
Maximum Junction-to-Ambient a
Maximum Junction-to-Case (Drain)
t ≤ 10 s
Steady State
Steady State
R thJA
R thJC
26
60
3.9
35
85
5.5
°C/W
Notes
a. Surface Mounted on 1" x 1" FR4 board.
b. See Solder Profile ( www.vishay.com/ppg?73257 ). The PowerPAK SO-8 is a leadless package. The end of the lead terminal is exposed
copper (not plated) as a result of the singulation process in manufacturing. A solder fillet at the exposed copper tip cannot be guaranteed and
is not required to ensure adequate bottom side solder interconnection.
c. Rework Conditions: manual soldering with a soldering iron is not recommended for leadless components.
Document Number: 71845
S09-0268-Rev. E, 16-Feb-09
www.vishay.com
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