Electrical Characteristics (TA = 25°C unless otherwise noted)
Symbol Parameter Conditions
DRAIN-SOURCE DIODE CHARACTERISTICS AND MAXIMUM RATINGS
Min
Typ
Max
Units
Maximum Continuous Drain-Source Diode Forward Current
Drain-Source Diode Forward Voltage
-2.1
-1.2
A
V
IS
-0.8
VSD
Notes:
VGS = 0 V, IS = -2.1 A (Note 2)
1. RqJA is the sum of the junction-to-case and case-to-ambient thermal resistance where the case thermal reference is defined as the solder mounting surface of the drain pins. RqJC is guaranteed by
design while RqCA is determined by the user's board design.
T - T
T - T
= I2D (t) ´ RDS(ON )
J
J
A
J
A
( )
PD t =
=
(t)
T
R
R
+R (t)
qJ
A
q
q
CA
J
C
Typical RqJA using the board layouts shown below on 4.5"x5" FR-4 PCB in a still air environment:
a. 50oC/W when mounted on a 1 in2 pad of 2oz copper.
b. 105oC/W when mounted on a 0.04 in2 pad of 2oz copper.
c. 125oC/W when mounted on a 0.006 in2 pad of 2oz copper.
1a
1b
1c
Scale 1 : 1 on letter size paper
2. Pulse Test: Pulse Width < 300µs, Duty Cycle < 2.0%.
NDS8435 Rev. B2
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
