Typical Characteristics (continued)
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 23
shows the reverse recovery characteristic of the
FDS6982AS.
Schottky barrier diodes exhibit significant leakage at
high temperature and high reverse voltage. This will
increase the power in the device.
0.1
TA = 125oC
0.01
0.001
TA = 100oC
0.0001
0.00001
TA = 25oC
0.000001
0
5
10
15
20
25
30
VDS, REVERSE VOLTAGE (V)
Figure 25. SyncFET body diode reverse
leakage versus drain-source voltage and
temperature
Time: 10nS/DIV
Figure 23. FDS6982AS SyncFET body
diode reverse recovery characteristic.
For comparison purposes, Figure 24 shows the reverse
recovery characteristics of the body diode of an
equivalent size MOSFET produced without SyncFET
(FDS6982).
Time: 10nS/DIV
Figure 24. Non-SyncFET (FDS6982) body
diode reverse recovery characteristic.
FDS6982AS Rev A1 (X)
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
