Si4942DY
Vishay Siliconix
Dual N-Channel 40-V (D-S) MOSFET
PRODUCT SUMMARY
VDS (V)
40 40
FEATURES
D TrenchFETr Power MOSFET ID (A)
7.4 6.4
rDS(on) (W)
0.021 @ VGS = 10 V 0.028 @ VGS = 4.5 V
APPLICATIONS
D Low Power Synchronous Rectifier D Automotive 12-V Systems
D1
D2
SO-8
S1 G1 S2 G2 1 2 3 4 Top View Ordering Information: Si4942DY Si4942DY-T1 (with Tape and Reel) S1 N-Channel MOSFET S2 N-Channel MOSFET 8 7 6 5 D1 D1 D2 D2 G1 G2
ABSOLUTE MAXIMUM RATINGS (TA = 25_C UNLESS OTHERWISE NOTED)
Parameter
Drain-Source Voltage Gate-Source Voltage Continuous Drain Current (TJ = 150_C)a Pulsed Drain Current Avalanche Current Continuous Source Current (Diode Conduction)a Maximum Power Dissipationa Operating Junction and Storage Temperature Range TA = 25_C TA = 70_C L = 0.1 mH TA = 25_C TA = 70_C
Symbol
VDS VGS
10 secs
40 "20 7.4
Steady State
Unit
V
5.3 4.3 30 25 A
ID IDM IAS IS PD TJ, Tstg
5.8
1.8 2.1 1.3 - 55 to 150
0.9 1.1 0.7 W _C
THERMAL RESISTANCE RATINGS
Parameter
t v 10 sec Maximum J Mi Junction-to-Ambienta ti t A bi t Maximum Junction-to-Foot (Drain) Notes a. Surface Mounted on 1” x 1” FR4 Board. Document Number: 71887 S-03950—Rev. B, 16-May-03 www.vishay.com Steady State Steady State RthJA RthJF
Symbol
Typical
50 90 28
Maximum
60 110 34
Unit
_C/W
1
Si4942DY
Vishay Siliconix
SPECIFICATIONS (TJ = 25_C UNLESS OTHERWISE NOTED)
Parameter Static
Gate Threshold Voltage Gate-Body Leakage Zero Gate Voltage Drain Current On-State Drain Currenta Drain-Source On-State Resistance Drain-Source On-State Resistancea Forward Transconductancea Diode Forward Voltagea VGS(th) IGSS IDSS ID(on) rDS(on) gfs VSD VDS = VGS, ID = 250 mA VDS = 0 V, VGS = "20 V VDS = 32 V, VGS = 0 V VDS = 32 V, VGS = 0 V, TJ = 55_C VDS w 5 V, VGS = 10 V VGS = 10 V, ID = 7.4 A VGS = 4.5 V, ID = 6.4 A VDS = 15 V, ID = 7.4 A IS = 1.8 A, VGS = 0 V 30 0.017 0.023 25 0.75 1.1 0.021 0.028 S V 1.0 3 "100 1 5 V nA mA A W
Symbol
Test Condition
Min
Typ
Max
Unit
Dynamicb
Total Gate Charge Gate-Source Charge Gate-Drain Charge Gate Resistance Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time Source-Drain Reverse Recovery Time Qg Qgs Qgd RG td(on) tr td(off) tf trr IF = 1.8 A, di/dt = 100 A/ms VDD = 20 V, RL = 20 W V, ID ^ 1 A, VGEN = 10 V, RG = 6 W 0.5 VDS = 20 V, VGS = 10 V, ID = 5.7 A 21 3.3 5.8 1.1 13 10 31 11 30 1.6 20 15 50 20 60 ns W 32 nC
Notes a. Pulse test; pulse width v 300 ms, duty cycle v 2%. b. Guaranteed by design, not subject to production testing.
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
Output Characteristics
30 VGS = 10 thru 5 V 25 I D - Drain Current (A) 4V I D - Drain Current (A) 25 30
Transfer Characteristics
20
20
15
15
10
10 TC = 125_C 5 25_C - 55_C 0
5 3V 0 0 1 2 3 4 5
0
1
2
3
4
5
VDS - Drain-to-Source Voltage (V)
VGS - Gate-to-Source Voltage (V) Document Number: 71887 S-03950—Rev. B, 16-May-03
www.vishay.com
2
Si4942DY
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
On-Resistance vs. Drain Current
0.040 r DS(on) - On-Resistance ( W ) 1600
Capacitance
0.030 VGS = 4.5 V
C - Capacitance (pF)
1280 Ciss 960
0.020
VGS = 10 V
640
0.010 320 Crss
Coss
0.000 0 5 10 15 20 25 30
0 0 8 16 24 32 40
ID - Drain Current (A)
VDS - Drain-to-Source Voltage (V)
Gate Charge
10 V GS - Gate-to-Source Voltage (V) VDS = 20 V ID = 5.7 A 8 1.8
On-Resistance vs. Junction Temperature
VGS = 10 V ID = 7.4 A
r DS(on) - On-Resistance (W ) (Normalized)
1.6
1.4
6
1.2
4
1.0
2
0.8
0 0 5 10 15 20 25 Qg - Total Gate Charge (nC)
0.6 - 50
- 25
0
25
50
75
100
125
150
TJ - Junction Temperature (_C)
Source-Drain Diode Forward Voltage
30 0.10
On-Resistance vs. Gate-to-Source Voltage
I S - Source Current (A)
TJ = 150_C
r DS(on) - On-Resistance ( W )
10
0.08
0.06 ID = 7.4 A 0.04
1 TJ = 25_C
0.02
0.1 0.0
0.00 0.2 0.4 0.6 0.8 1.0 1.2 0 2 4 6 8 10 VSD - Source-to-Drain Voltage (V) VGS - Gate-to-Source Voltage (V)
Document Number: 71887 S-03950—Rev. B, 16-May-03
www.vishay.com
3
Si4942DY
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
Threshold Voltage
0.6 0.4 40 0.2 V GS(th) Variance (V) - 0.0 - 0.2 - 0.4 - 0.6 - 0.8 - 1.0 - 50 0 0.001 ID = 250 mA Power (W) 30 50
Single Pulse Power
20
10
- 25
0
25
50
75
100
125
150
0.01
0.1
1 Time (sec)
10
100
600
TJ - Temperature (_C)
Safe Operating Area
100 Limited by rDS(on) 10 I D - Drain Current (A) 1 mS
1 TA = 25_C Single Pulse
10 mS 100 mS 1S 10 S dc
0.1
0.01 0.1 1 10 100
VDS - Drain-to-Source Voltage (V)
Normalized Thermal Transient Impedance, Junction-to-Ambient
2 1 Normalized Effective Transient Thermal Impedance Duty Cycle = 0.5
0.2
Notes:
0.1 0.1 0.05
t1 PDM
0.02 Single Pulse 0.01 10 -4 10 -3 10 -2 10 -1 1 Square Wave Pulse Duration (sec)
t2 1. Duty Cycle, D =
2. Per Unit Base = RthJA = 90_C/W 3. TJM - TA = PDMZthJA(t) 4. Surface Mounted
t1 t2
10
100
600
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Document Number: 71887 S-03950—Rev. B, 16-May-03
Si4942DY
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
Normalized Thermal Transient Impedance, Junction-to-Foot
2 1 Normalized Effective Transient Thermal Impedance Duty Cycle = 0.5
0.2 0.1 0.1 0.05 0.02
Single Pulse 0.01 10 -4 10 -3 10 -2 10 -1 Square Wave Pulse Duration (sec) 1 10
Document Number: 71887 S-03950—Rev. B, 16-May-03
www.vishay.com
5
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