Zowie Technology Corporation
Schottky Barrier Diode
Lead free product
Halogen-free type
3
ANODE
CATHODE
3
RB491DGH
1
2
1
SOT-23
Features
Small surface mounting type.
Ultra low V
F
. (V
F
=0.40V Typ. at 1A)
I
F
=1.0A guaranteed despite the size.
We declare that the material of product
compliance with RoHS requirements.
We declare that the material of product
is Halogen Free (Green Epoxy Compound).
APPLICATIONS
Low-power rectification
For switching power supply
!
Absolute maximum ratings
(Ta=25°C)
Parameter
Peak reverse voltage
DC reverse voltage
DC forward current
Peak forward surge current
∗
Junction temperature
Storage temperature
∗
60Hz for 1
Symbol
V
RM
V
R
I
F
I
FSM
Tj
Tstg
Limits
25
20
1.0
3
125
−40∼+125
Unit
V
V
A
A
˚C
˚C
!
Electrical characteristics
(Ta=25°C)
Parameter
Forward voltage
Reverse current
Symbol
V
F
I
R
Min.
−
−
Typ.
−
−
Max.
0.45
200
Unit
V
µA
I
F
=1.0A
V
R
=20V
Conditions
Note) ESD sensitive product handling required.
REV. 0
Zowie Technology Corporation
Zowie Technology Corporation
RB491DGH
!
Electrical characteristic curves
(Ta=25°C)
Fig.1 Forward characteristics
10
REVERSE CURRENT : I
R
(mA)
Fig.2 Reversecharacteristics
1000
100
10
75˚C
1
100µ
10µ
1µ
0.1µ
0
25˚C
FORWARD CURRENT : I
F
(A)
1
Ta=125˚C
T
a
=
1
2
5
˚
C
7
5
˚
C
2
5
˚
C
100m
10m
−
2
5
˚
C
1m
−25˚C
0.1m
0
0.1
0.2
0.3
0.4
0.5
0.6
10
20
30
40
50
60
70
FORWARD VOLTAGE : V
F
(V)
REVERSE VOLTAGE : V
R
(V)
Fig.3 Capacitance between
terminals characteristics
FORWARD POWER DISSIPATION : P
F
(W)
10000
f=1MHz
TERMINAL CAPACITANCE : C
T
(pF)
0.7
0.6
Fig.4 Forward power dissipation
characteristics
DC
D=0.8
D=0.5
sine
D=0.3
D=0.2
1000
0.5
0.4
D=0.05
D=0.1
100
0.3
I
F
10
0.2
Tp
I
O
T
D=Tp/T
Tj=Tj Max.
0.1
0
0
1
0
5
10
15
20
25
30
35
40
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
REVERSE
VOLTAGE
: V
R
(V)
AVERAGE RECTIFIED FORWARD CURRENT : I
O
(A)
Fig.5 Derating curve (I
O
- Ta)
AVERAGE RECTIFIED FORWARD CURRENT : I
O
(A)
1.5
DC
D=0.8
sine
D
=
0.5
Tp
I
F
I
O
T
D
=
Tp/T
V
R
=
V
RM
/2
1.0
D
=
0.3
D
=
0.2
0.5
D=0.1
D=0.05
0
0
25
50
75
100
125
AMBIENT TEMPERATURE : Ta (˚C)
REV. 0
Zowie Technology Corporation
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