
2SD2537
Data Sheet
2/2
www.rohm.com
c
2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.D
DC
CURRENT
GAIN
:
h
FE
COLLECTOR CURRENT : IC
(mA)
Fig.4 DC current gain vs. collector current ( )
10
20
50
100
200
500
1000
2000
5000
10000
2
5
10
20
50 100 200
500 1000 2000
Ta
=25°C
Pulsed
1V
5V
3V
VCE
=10V
DC
CURRENT
GAIN
:
h
FE
COLLECTOR CURRENT : IC
(mA)
Fig.5 DC current gain vs. collector current (
)
10
20
50
100
200
500
1000
2000
5000
10000
2
5
10
20
50 100 200
500 1000 2000
Pulsed
Ta
=100°C
25
°C
25°C
VCE
=5V
COLLECTOR
SATURATION
VOLTAGE
:
V
BE(sat)
(mV)
COLLECTOR CURRENT : IC
(mA)
Fig.6 Collector-emitter saturation voltage
vs. collector current ( )
1
2
5
10
20
50
100
200
500
1000
2
5
10
20
50 100 200
500 1000 2000
Ta
=25°C
Pulsed
IC/IB
=100
50
10
COLLECTOR
SATURATION
VOLTAGE
:
V
BE(sat)
(mV)
COLLECTOR CURRENT : IC
(mA)
Fig.7 Collector-emitter saturation voltage
vs. collector current (
)
1
2
5
10
20
50
100
200
500
1000
2
5
10
20
50 100 200
500 1000 2000
Pulsed
Ta
=100°C
25
°C
25°C
IC/IB
=50
BASE
SATURATION
VOLTAGE
:
V
BE(sat)
(mV)
COLLECTOR CURRENT : IC
(mA)
Fig.8 Base-emitter saturation voltage
vs. collector current ( )
10
20
50
100
200
500
1000
2000
5000
10000
2
5
10
20
50 100 200
500 1000 2000
Ta
=25°C
Pulsed
50
100
IC/IB
=10
BASE
SATURATION
VOLTAGE
:
V
BE(sat)
(mV)
COLLECTOR CURRENT : IC
(mA)
Fig.9 Base-emitter saturation voltage
vs. collector current (
)
10
20
50
100
200
500
1000
2000
5000
10000
2
5
10
20
50 100 200
500 1000 2000
Pulsed
50
100
IC/IB
=50
Ta
= 25°C
TRANSITION
FREQUENCY
:
f
T
(MHz)
EMITTER CURRENT : IE
(mA)
Fig.10 Gain bandwidth product
vs. emitter current
10
20
50
100
200
500
1000
2000
5000
1 2
5 10 20
50 100 200
500 1000
Pulsed
VCE
=10V
Ta
=25°C
COLLECTOR
OUTPUT
CAPACITANCE
:
Cob
(pF)
COLLECTOR TO BASE VOLTAGE : VCB
(V)
Fig.11 Collector output capacitance
vs. collector-base voltage
1
2
5
10
20
50
100
200
500
1000
0.1 0.2
0.5
1
2
5
10
20
50 100
f
=1MHz
IE
=0A
Ta
=25°C