FDMS8660AS N-Channel PowerTrench
®
SyncFET
TM
www.fairchildsemi.com
6
©2009 Fairchild Semiconductor Corporation
FDMS8660AS Rev.C
1
SyncFET Schottky Body Diode
Characteristics
Fairchild’s SyncFET process embeds a Schottky diode in parallel
with PowerTrench MOSFET. This diode exhibits similar
characteristics to a discrete external Schottky diode in parallel
with a MOSFET. Figure 14 shows the reverse recovery
characteristic of the FDMS8660AS.
Schottky barrier diodes exhibit significant leakage at high tem-
perature and high reverse voltage. This will increase the power
in the device.
0 5 10 15 20 25 30
0.00001
0.0001
0.001
0.01
0.1
T
J
= 125
o
C
T
J
= 100
o
C
T
J
= 25
o
C
I
DSS
, REVERSE LEAKAGE CURRENT (A)
V
DS
, REVERSE VOLTAGE (V)
Typical Characteristics (continued)
Figure 14. FDMS8660AS SyncFET Body Diode
Reverse Recovery Characteristics
Figure 15. SyncFET Body Diode Reverse Leakage
vs Drain to Source Voltage
-20 0 20 40 60 80 100 120
-4
-3
-2
-1
0
1
2
3
4
5
CURRENT (A)
TIME (ns)