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BSS138
Rating
Symbol
Value
Unit
V
DSS
V
GS
I
D
I
DM
P
D
R
JA
Operating Junction and Storage
Temperature Range
T
J
, Tstg
-55 to 150
C
V
V
mA
mA
mW
C/W
Drain-Source Voltage
Gate-Source Voltage
Continuous Drain Current (TA=25 C)
Pulsed Drain Current(tp 10us)
Power Dissipation (TA=25 C)
Maximax Junction-to-Ambient
Maximum Ratings
(TA=25 C Unless Otherwise Specified)
Device Marking
BSS138=J1
Small Signal MOSFET
N-Channel
1
2
3
GATE
SOURCE
DRAIN
SOT-23
1
2
3
Features:
*Low On-Resistance : 3.5
*Low Input Capacitance: 40PF
*Low Out put Capacitance : 12PF
*Low Threshole :1 .5V
*Fast Switching Speed : 20ns
Application:
* DC to DC Converter
* Cellular & PCMCIA Card
* Cordless Telephone
* Power Management in Portable and Battery etc.
50
20
200
800
225
556
+_
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BSS138
Input Capacitance
V
DS
=25V, V
GS
=0V, f=1MHZ
Output Capacitance
V
DS
=25V, V
GS
=0V, f=1MHZ
Reverse Transfer Capacitance
V
DS
=25V, V
GS
=0V, f=1MHZ
Drain-Source Breakdown Voltage
V
GS
=0V, I
D
=250 A
Gate-Source Threshold Voltage
V
DS
=V
GS
, I
D
=1.0mA
Gate-Source Leakage Current
V
DS
=0V, V
GS
= 20V
Drain-Source On-Resistance
V
GS
=2.75V, I
D
200mA, TA=-40 C to + 85 C
V
GS
=5.0V, I
D
=200mA
Forward Transconductance
V
DS
=25V, I
D
=200mA, f=1.0KHZ
Static
Dynamic
Switching
(2)
Characteristic
Symbol
Unit
Min
Typ
Max
V
(BR)DSS
V
GS (th)
r
DS (
on
)
I
GSS
I
DSS
g
fs
C
iss
C
oss
C
rss
t
d
(
on
)
t
d(off)
50
-
V
0.5
-
1.5
V
-
-
-
-
-
0.1
0.5
0.1
uA
A
mS
5.6
-
10
3.5
40
12
3.5
PF
-
nS
20
20
Electrical Characteristics
(TA=25 C Unless otherwise noted)
Zero Gate Voltage Drain Current
V
DS
=25V, V
GS
=0V
V
DS
=50V, V
GS
=0V
-
-
-
100
-
-
-
-
-
-
50
25
5.0
Turn-On Time
V
DD
=30V, I
D
=200mA
Turn-Off Time
V
DD
=30V, I
D
=100mA
(1)
+
+
<
-
-
T Y P IC A L E L E C T R IC A L C HA R A C T E R IS T IC S
R
D
S
(
o
n
), D
R
A
I
N
-
T
O
-
S
O
U
R
C
E
R
E
S
I
S
T
A
N
C
E
(
N
O
R
M
A
L
I
Z
E
D
)
F igure 1. On-R egion C haracteris tics
1
TJ, JUNCTION TEMPERATURE ( C)
F igure 2. Trans fer C haracteris tics
F igure 3. On-R es is tance Variation with
Temperature
VGS = 10 V
ID = 0.8 A
- 55
-5
45
95
145
0.6
0.8
V G
S
,
G
A
T
E
-
T
O
-
S
O
U
R
C
E
V
O
L
T
A
G
E
(
V
O
L
T
S
)
0
4
0
QT, TOTAL GATE CHARGE (pC)
8
500
VDS = 40 V
TJ = 25 C
1000
ID = 200 mA
1500
1.2
2
1.4
1.6
1.8
VGS = 4.5 V
ID = 0.5 A
2000
10
2
6
V g
s
(
t
h
),
V
A
R
I
A
N
C
E
(
V
O
L
T
S
)
1
TJ, JUNCTION TEMPERATURE ( C)
ID = 1.0 mA
- 55
-5
45
95
145
0.75
0.875
1.125
1.25
0
0.3
0.4
0.1
0.6
0.2
F igure 4. T hres hold Voltage Variation
with Temperature
1
1.5
2
2.5
3
I D
,
D
R
A
I
N
C
U
R
R
E
N
T
(
A
M
P
S
)
VGS, GATE-T O-SOURCE VOLTAGE (VOLTS)
F igure 5. G ate C harge
VDS = 10 V
150 C
25 C
-55 C
3.5
0.5
4
0
2
4
10
0
0.3
0.4
VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS)
I D
,
D
R
A
I
N
C
U
R
R
E
N
T
(
A
M
P
S
)
6
0.1
8
0.6
0.2
0.5
1
3
9
5
7
VGS = 3.25 V
VGS = 2.75 V
VGS = 2.5 V
VGS = 3.0 V
VGS = 3.5 V
0.7
0.8
TJ = 25 C
0.7
0.8
0.9
4.5
0.5
0
2.2
-30
20
70
120
2500
3000
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T Y P IC A L E L E C T R IC A L C HA R A C T E R IS T IC S
R
D
S
(
o
n
),
D
R
A
I
N
-
T
O
-
S
O
U
R
C
E
R
E
S
I
S
T
A
N
C
E
(
O
H
M
S
)
F igure 6. On-R es is tance vers us Drain C urrent
0
0.1
0.2
2
5
6
F igure 7. On-R es is tance vers us Drain C urrent
ID, DRAIN CURRENT (AMPS)
F igure 8. On-R es is tance vers us Drain C urrent
0.001
0.1
1
F igure 9. On-R es is tance vers us Drain C urrent
VSD, DIODE FORWARD VOLTAGE (VOLTS)
F igure 10. B ody Diode F orward Voltage
I D
,
D
I
O
D
E
C
U
R
R
E
N
T
(
A
M
P
S
)
25 C
VGS = 2.5 V
TJ = 150 C
4
0
0.2
0.4
0.6
3
0.01
-55 C
25 C
0.8
R
D
S
(
o
n
),
D
R
A
I
N
-
T
O
-
S
O
U
R
C
E
R
E
S
I
S
T
A
N
C
E
(
O
H
M
S
)
0
0.1
0.2
1
7
ID, DRAIN CURRENT (AMPS)
VGS = 2.75 V
5
3
0
120
40
0
80
5
10
Ciss
15
0.05
0.15
0.25
150 C
-55 C
6
8
4
2
0.05
0.15
0.25
20
1.0
1.2
150 C
25 C
-55 C
8
9
7
100
20
60
F igure 1 1. C apacitance
R
D
S
(
o
n
),
D
R
A
I
N
-
T
O
-
S
O
U
R
C
E
R
E
S
I
S
T
A
N
C
E
(
O
H
M
S
)
0
0.2
0.4
0.05
1
2.5
3
ID, DRAIN CURRENT (AMPS)
25 C
VGS = 4.5 V
2
1.5
R
D
S
(
o
n
),
D
R
A
I
N
-
T
O
-
S
O
U
R
C
E
R
E
S
I
S
T
A
N
C
E
(
O
H
M
S
)
0
0.2
0.4
0.05
1
4
ID, DRAIN CURRENT (AMPS)
VGS = 10 V
3
2
0.1
0.3
0.5
150 C
-55 C
3.5
4.5
2.5
1.5
0.1
0.3
0.5
150 C
25 C
-55 C
4
4.5
3.5
10
1
0.25
0.45
0.15
0.35
5
5.5
6
0.25
0.45
0.15
0.35
25
Coss
Crss
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