UMF21N Datasheet, PDF (3/4 Pages) Rohm – Power management (dual transistors)

Transistors
zElectrical characteristic curves
Tr1
1000
1000
VCE=2V
Pulsed
100
100
Ta=125°C
Ta=25°C
Ta=−40°C
10
10
EMF21 / UMF21N
VCE=2V
Pulsed
1000
Ta=25°C
Pulsed
100
IC/IB=50
IC/IB=20
10 ^IC/IB=10
1
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
BASE TO EMITTER VOLTAGE : VBE (V)
Fig.1 Grounded emitter propagation
characteristics
1
1
10
100
1000
COLLECTOR CURRENT : IC (mA)
1
1
10
100
1000
COLLECTOR CURRENT : IC (mA)
Fig.2 DC current gain vs.
collector current
Fig.3 Collector-emitter saturation voltage
vs. collector current ( Ι )
1000
IC/IB=20
Pulsed
100
Ta=125°C
Ta=25°C
Ta=−40°C
10
10000
1000
100
IC/IB=20
Pulsed
Ta=25°C
Ta=−40°C
Ta=125°C
1000
VCE=2V
Ta=25°C
Pulsed
100
10
1
1
10
100
1000
COLLECTOR CURRENT : IC (mA)
Fig.4 Collector-emitter saturation voltage
vs. collector current ( ΙΙ )
10
1
10
100
1000
COLLECTOR CURRENT : IC (mA)
Fig.5 Base-emitter saturation voltage
vs. collector current
1
1
10
100
1000
EMITTER CURRENT : IE (mA)
Fig.6 Gain bandwidth product
vs. emitter current
1000
IE=0A
f=1MHz
Ta=25°C
100
Cib
10
Cob
1
0.1
1
10
100
COLLECTOR TO BASE VOLTAGE : VCB (V)
Fig.7 Collector output capacitance
vs. collector-base voltage
Emitter input capacitance
vs. emitter-base voltage
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