NDS8434A Fairchild Semiconductor, NDS8434A Datasheet - Page 6

• Manufacturer Part Number: NDS8434A
• Description: MOSFET P-CH 20V 7.8A 8-SOIC
• Manufacturer: Fairchild Semiconductor

Specifications of NDS8434A

• Fet Type: MOSFET P-Channel, Metal Oxide
• Fet Feature: Logic Level Gate
• Rds On (max) @ Id, Vgs: 24 mOhm @ 7.9A, 4.5V
• Drain To Source Voltage (vdss): 20V
• Current - Continuous Drain (id) @ 25° C: 7.8A
• Vgs(th) (max) @ Id: 1V @ 250µA
• Gate Charge (qg) @ Vgs: 55nC @ 4.5V
• Input Capacitance (ciss) @ Vds: 1730pF @ 10V
• Power - Max: 1W
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NDS8434ATR

Typical Electrical and ThermalCharacteristics
Figure 13. Transconductance Variation with Drain
8.5
7.5
6.5
5.5
Figure 15. Maximum Steady- State Drain
0.005
0.002
0.001
60
50
40
30
20
10
0.05
0.02
0.01
8
7
6
5
0
0.5
0.2
0.1
0
0.0001
0
1
1 c
1 b
Current and Temperature
Current versus Copper Mounting Pad
Area.
V
DS
= - 4.5V
0.2
D = 0.5
2oz COPPER MOUNTING PAD AREA (in
-6
0.2
0.1
0.05
I , DRAIN CURRENT (A)
D
0.001
0.02
0.4
-12
0.01
Figure 17. Transient Thermal Response Curve
Note: Thermal characterization performed using the conditions described in note 1c. Transient thermal response will change
Single Pulse
depending on the circuit board design.
0.6
.
-18
T = -55°C
J
0.01
125°C
25°C
4.5"x5" FR-4 Board
T
Still Air
V
2
A
G S
0.8
)
-24
= 2 5 C
= - 4 . 5 V
o
1a
1
-30
0.1
t , TIME (sec)
1
(continued)
Figure 16. Maximum Safe Operating Area
Figure 14. SO-8 Maximum Steady-State Power
2.5
1.5
0.5
0.05
0.01
2
1
0.5
0.1
50
30
10
0
5
2
1
0.1
1c
1 b
Dissipation versus Copper Mounting Pad Area.
R
SINGLE PULSE
JA
0.2
.
V
T
A
1
GS
= See Note 1c
A
0.2
2oz COPPER MOUNTING PAD AREA (in
= 25°C
= -4.5V
- V
0.5
DS
, DRAIN-SOURCE VOLTAGE (V)
0.4
1
P(pk)
T - T = P * R
10
R
Duty Cycle, D = t /t
J
2
R
NDS8434A Rev.D
JA
JA
t
1
A
0.6
(t) = r(t) * R
t
= See note 1c
2
5
4.5"x5" FR-4 Board
T
Still Air
A
.
JA
1
10
= 2 5 C
0.8
2
2
)
(t)
2
o
JA
100
20
1a
1
40
300