www.docs.chipfind.ru
May 2001
Rev. A, May 2001
2001 Fairchild Semiconductor Corporation
FQ
T4N25
QFET
TM
FQT4N25
250V N-Channel MOSFET
General Description
These N-Channel enhancement mode power field effect
transistors are produced using Fairchild's proprietary,
planar stripe, DMOS technology.
This advanced technology has been especially tailored to
minimize on-state resistance, provide superior switching
performance, and withstand high energy pulse in the
avalanche and commutation mode. These devices are well
suited for high efficiency switching DC/DC converters,
switch mode power supply.
Features
0.83A, 250V, R
DS(on)
= 1.75
@V
GS
= 10 V
Low gate charge ( typical 4.3 nC)
Low Crss ( typical 4.8 pF)
Fast switching
Improved dv/dt capability
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S
D
G
SOT-223
FQT Series
G
D
S
Absolute Maximum Ratings
T
C
= 25C unless otherwise noted
Thermal Characteristics
Symbol
Parameter
FQT4N25
Units
V
DSS
Drain-Source Voltage
250
V
I
D
Drain Current
- Continuous (T
C
= 25C)
0.83
A
- Continuous (T
C
= 70C)
0.66
A
I
DM
Drain Current
- Pulsed
(Note 1)
3.3
A
V
GSS
Gate-Source Voltage
30
V
E
AS
Single Pulsed Avalanche Energy
(Note 2)
52
mJ
I
AR
Avalanche Current
(Note 1)
0.83
A
E
AR
Repetitive Avalanche Energy
(Note 1)
0.25
mJ
dv/dt
Peak Diode Recovery dv/dt
(Note 3)
5.5
V/ns
P
D
Power Dissipation (T
C
= 25C)
2.5
W
- Derate above 25C
0.02
W/C
T
J
, T
STG
Operating and Storage Temperature Range
-55 to +150
C
T
L
Maximum lead temperature for soldering purposes,
1/8
"
from case for 5 seconds
300
C
Symbol
Parameter
Typ
Max
Units
R
JA
Thermal Resistance, Junction-to-Ambient *
--
50
C
/
W
* When mounted on the minimum pad size recommended (PCB Mount)
Rev. A, May 2001
FQ
T4N25
(Note 4)
(Note 4, 5)
(Note 4, 5)
(Note 4)
2001 Fairchild Semiconductor Corporation
Electrical Characteristics
T
C
= 25C unless otherwise noted
Notes:
1. Repetitive Rating : Pulse width limited by maximum junction temperature
2. L = 120mH, I
AS
= 0.83A, V
DD
= 50V, R
G
= 25
,
Starting T
J
= 25C
3. I
SD
3.6A, di/dt
300A/
s, V
DD
BV
DSS,
Starting T
J
= 25C
4. Pulse Test : Pulse width
300
s, Duty cycle
2%
5. Essentially independent of operating temperature
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
Off Characteristics
BV
DSS
Drain-Source Breakdown Voltage
V
GS
= 0 V, I
D
= 250
A
250
--
--
V
BV
DSS
/
T
J
Breakdown Voltage Temperature
Coefficient
I
D
= 250
A, Referenced to 25C
--
0.22
--
V/C
I
DSS
Zero Gate Voltage Drain Current
V
DS
= 250 V, V
GS
= 0 V
--
--
1
A
V
DS
= 200 V, T
C
= 125C
--
--
10
A
I
GSSF
Gate-Body Leakage Current, Forward
V
GS
= 30 V, V
DS
= 0 V
--
--
100
nA
I
GSSR
Gate-Body Leakage Current, Reverse
V
GS
= -30 V, V
DS
= 0 V
--
--
-100
nA
On Characteristics
V
GS(th)
Gate Threshold Voltage
V
DS
= V
GS
, I
D
= 250
A
3.0
--
5.0
V
R
DS(on)
Static Drain-Source
On-Resistance
V
GS
= 10 V, I
D
= 0.415 A
--
1.38
1.75
g
FS
Forward Transconductance
V
DS
= 50 V, I
D
= 0.415 A
--
1.28
--
S
Dynamic Characteristics
C
iss
Input Capacitance
V
DS
= 25 V, V
GS
= 0 V,
f = 1.0 MHz
--
155
200
pF
C
oss
Output Capacitance
--
35
45
pF
C
rss
Reverse Transfer Capacitance
--
4.8
6.5
pF
Switching Characteristics
t
d(on)
Turn-On Delay Time
V
DD
= 125 V, I
D
= 3.6 A,
R
G
= 25
--
6.8
25
ns
t
r
Turn-On Rise Time
--
45
100
ns
t
d(off)
Turn-Off Delay Time
--
6.4
25
ns
t
f
Turn-Off Fall Time
--
22
55
ns
Q
g
Total Gate Charge
V
DS
= 200 V, I
D
= 3.6 A,
V
GS
= 10 V
--
4.3
5.6
nC
Q
gs
Gate-Source Charge
--
1.3
--
nC
Q
gd
Gate-Drain Charge
--
2.1
--
nC
Drain-Source Diode Characteristics and Maximum Ratings
I
S
Maximum Continuous Drain-Source Diode Forward Current
--
--
0.83
A
I
SM
Maximum Pulsed Drain-Source Diode Forward Current
--
--
3.3
A
V
SD
Drain-Source Diode Forward Voltage
V
GS
= 0 V, I
S
= 0.83 A
--
--
1.5
V
t
rr
Reverse Recovery Time
V
GS
= 0 V, I
S
= 3.6 A,
dI
F
/ dt = 100 A/
s
--
110
--
ns
Q
rr
Reverse Recovery Charge
--
0.35
--
C
Rev. A, May 2001
2001 Fairchild Semiconductor Corporation
FQ
T4N25
0.2
0.4
0.6
0.8
1.0
1.2
1.4
10
-1
10
0
25
150
Notes :
1. V
GS
= 0V
2. 250
s Pulse Test
I
DR
,
R
e
v
e
r
s
e D
r
ai
n
C
u
r
r
ent
[
A
]
V
SD
, Source-Drain Voltage [V]
2
4
6
8
10
10
-1
10
0
Notes :
1. V
DS
= 50V
2. 250
s Pulse Test
-55
150
25
I
D
, D
r
a
i
n
C
u
r
r
e
n
t [A
]
V
GS
, Gate-Source Voltage [V]
0
1
2
3
4
5
0
2
4
6
8
10
12
V
DS
= 125V
V
DS
= 50V
V
DS
= 200V
Note : I
D
= 3.6 A
V
GS
,
G
a
t
e
-
S
our
c
e
V
o
l
t
ag
e [
V
]
Q
G
, Total Gate Charge [nC]
10
-1
10
0
10
1
0
50
100
150
200
250
300
350
C
iss
= C
gs
+ C
gd
(C
ds
= shorted)
C
oss
= C
ds
+ C
gd
C
rss
= C
gd
Notes :
1. V
GS
= 0 V
2. f = 1 MHz
C
rss
C
oss
C
iss
C
a
pa
c
i
t
anc
e
[
p
F]
V
DS
, Drain-Source Voltage [V]
0
2
4
6
8
0
2
4
6
8
V
GS
= 20V
V
GS
= 10V
Note : T
J
= 25
R
DS
(
O
N)
[
],
D
r
ai
n-
Sour
c
e
O
n
-
R
es
i
s
t
a
nc
e
I
D
, Drain Current [A]
10
-1
10
0
10
1
10
-1
10
0
V
GS
Top : 15.0 V
10.0 V
8.0 V
7.0 V
6.5 V
6.0 V
Bottom : 5.5 V
Notes :
1. 250
s Pulse Test
2. T
C
= 25
I
D
, D
r
a
i
n
C
u
rr
e
n
t [A
]
V
DS
, Drain-Source Voltage [V]
Typical Characteristics
Figure 5. Capacitance Characteristics
Figure 6. Gate Charge Characteristics
Figure 3. On-Resistance Variation vs.
Drain Current and Gate Voltage
Figure 4. Body Diode Forward Voltage
Variation vs. Source Current
and Temperature
Figure 2. Transfer Characteristics
Figure 1. On-Region Characteristics
FQ
T4N25
Rev. A, May 2001
2001 Fairchild Semiconductor Corporation
1 0
-5
1 0
-4
1 0
-3
1 0
-2
1 0
-1
1 0
0
1 0
1
1 0
2
1 0
3
1 0
-1
1 0
0
1 0
1
N o te s :
1 . Z
J C
(t) = 5 0
/W M a x .
2 . D u ty F a c to r, D = t
1
/t
2
3 . T
J M
- T
C
= P
D M
* Z
J C
(t)
s in g le p u ls e
D = 0 .5
0 .0 2
0 .2
0 .0 5
0 .1
0 .0 1
Z
JC
(
t
)
,
Ther
m
a
l
R
e
s
pon
se
t
1
, S q u a re W a v e P u ls e D u ra tio n [s e c ]
25
50
75
100
125
150
0.0
0.2
0.4
0.6
0.8
1.0
I
D
, D
r
a
i
n
C
u
r
r
e
n
t
[A
]
T
C
, Case Temperature [
]
10
-1
10
0
10
1
10
2
10
-3
10
-2
10
-1
10
0
10
1
100 ms
DC
10 ms
1 ms
100
s
Operation in This Area
is Limited by R
DS(on)
Notes :
1. T
C
= 25
o
C
2. T
J
= 150
o
C
3. Single Pulse
I
D
,
D
r
ai
n C
u
r
r
e
nt
[
A
]
V
DS
, Drain-Source Voltage [V]
-100
-50
0
50
100
150
200
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Notes :
1. V
GS
= 10 V
2. I
D
= 0.415 A
R
DS
(
O
N)
, (
N
o
r
m
a
li
z
e
d
)
D
r
a
i
n-
Sour
c
e
O
n
-
R
e
s
i
s
t
a
n
c
e
T
J
, Junction Temperature [
o
C]
-100
-50
0
50
100
150
200
0.8
0.9
1.0
1.1
1.2
Notes :
1. V
GS
= 0 V
2. I
D
= 250
A
BV
DS
S
,
(
N
o
r
m
a
liz
e
d
)
D
r
ai
n
-
S
o
u
r
ce B
r
e
a
kdow
n V
o
l
t
age
T
J
, Junction Temperature [
o
C]
Typical Characteristics
(Continued)
Figure 9. Maximum Safe Operating Area
Figure 10. Maximum Drain Current
vs. Case Temperature
Figure 7. Breakdown Voltage Variation
vs. Temperature
Figure 8. On-Resistance Variation
vs. Temperature
Figure 11. Transient Thermal Response Curve
t
1
P
DM
t
2
Rev. A, May 2001
2001 Fairchild Semiconductor Corporation
FQ
T4N25
Charge
V
GS
10V
Q
g
Q
gs
Q
gd
3mA
V
GS
DUT
V
DS
300nF
50K
200nF
12V
Same Type
as DUT
Charge
V
GS
10V
Q
g
Q
gs
Q
gd
3mA
V
GS
DUT
V
DS
300nF
50K
200nF
12V
Same Type
as DUT
V
GS
V
DS
10%
90%
t
d(on)
t
r
t
on
t
off
t
d(off)
t
f
V
DD
10V
V
DS
R
L
DUT
R
G
V
GS
V
GS
V
DS
10%
90%
t
d(on)
t
r
t
on
t
off
t
d(off)
t
f
V
DD
10V
V
DS
R
L
DUT
R
G
V
GS
E
AS
=
L I
AS
2
----
2
1
--------------------
BV
DSS
- V
DD
BV
DSS
V
DD
V
DS
BV
DSS
t
p
V
DD
I
AS
V
DS
(t)
I
D
(t)
Time
10V
DUT
R
G
L
I
D
t
p
E
AS
=
L I
AS
2
----
2
1
E
AS
=
L I
AS
2
----
2
1
----
2
1
--------------------
BV
DSS
- V
DD
BV
DSS
V
DD
V
DS
BV
DSS
t
p
V
DD
I
AS
V
DS
(t)
I
D
(t)
Time
10V
DUT
R
G
L
L
I
D
I
D
t
p
Gate Charge Test Circuit & Waveform
Resistive Switching Test Circuit & Waveforms
Unclamped Inductive Switching Test Circuit & Waveforms
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