Bulletin PD-20478 rev. H 07/06
20CJQ045
SCHOTTKY RECTIFIER
2 Amp
I
F(AV)
= 2 Amp
V
R
= 45V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5
μs
sine
V
F
T
J
@ 1 Apk, T
J
= 125°C
(per leg)
range
Values
2.0
45
390
0.50
Description/ Features
Units
A
V
A
V
The 20CJQ045 surface mount Schottky rectifier series has
been designed for applications requiring very low forward drop
and very small foot prints. Typical applications are in portables,
switching power supplies, converters, automotive system,
free-wheeling diodes, battery charging, and reverse battery
protection.
Small footprint, surface mountable
Low profile
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term reliability
Common cathode
- 55 to 150
°C
Case Styles
SOT-223
Document Number: 93272
www.vishay.com
1
20CJQ045
Bulletin PD-20478 rev. H
07/06
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
20CJQ045
45
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward
Current
I
FSM
E
AS
I
AR
(Per Leg)
* See Fig. 5(Per Device)
Values
2
4
390
23
2
1
Units
A
Conditions
50% duty cycle @ T
C
= 126°C, rectangular wave form
50% duty cycle @ T
C
= 102°C, rectangular wave form
5μs Sine or 3μs Rect. pulse Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
T
J
= 25 °C, I
AS
= 1 Amps, L = 4 mH
Current decaying linearly to zero in 1
μsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
A
mJ
A
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
Values
0.54
0.67
0.50
0.65
0.1
10
0.278
168.4
70
6
7700
Units
V
V
V
V
mA
mA
V
mΩ
Conditions
@ 1A
@ 2A
@ 1A
@ 2A
T
J
= 25 °C
T
J
= 125 °C
T
J
= T
J
max.
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
V
F(TO)
Threshold Voltage
r
t
C
T
L
S
Forward Slope Resistance
Typ. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
pF
nH
V/
μs
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change
(Rated V
R
)
(1) Pulse Width < 300μs, Duty Cycle <2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
Junction to Ambient
R
thJL
Max. Thermal Resistance
Junction to Lead
wt
Approximate Weight
Case Style
0.13 (.0045) g (oz.)
SOT-223
25
°C/W DC operation
Values
-55 to 150
-55 to 150
65
Units
°C
°C
Conditions
R
thJA
Max. Thermal Resistance
°C/W DC operation
Document Number: 93272
www.vishay.com
2
20CJQ045
Bulletin PD-20478 rev. H
07/06
10
100
10
1
0.1
0.01
0.001
0.0001
T = 150°C
R
everse Current - I
R
(mA)
T
J
= 150°C
125°C
100°C
75°C
50°C
25°C
Ins
tantaneous Forward Current - I
F
(A)
0
5
10
15 20 25 30 35 40
45
1
J
Reverse Voltage - V
R
(V)
T
J
= 125°C
T
J
= 25°C
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
100
Junction Capac itance - C
T
(pF
)
T
J
= 25°C
0.1
0
0.4
0.8
1.2
1.6
10
0
10
20
30
40
50
Forward Voltage Drop - V
FM
(V)
R
everse Voltage - V (V)
R
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
100
T
herma l Impedanc e Z
thJC
(°C/ W)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
10
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
P
DM
1
S
ingle Pulse
(T
hermal Resistance)
Notes:
t1
t2
1. Duty fac tor D = t 1/ t 2
2. Peak T = P x Z
thJC
+ T
C
J
DM
0.1
1
10
100
0.1
0.00001
0.0001
0.001
0.01
t 1 , Rectangular Pulse Duration (S
econds)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
Document Number: 93272
www.vishay.com
3
20CJQ045
Bulletin PD-20478 rev. H
07/06
150
Allowable Case T
emperature - (°C)
140
Average Power Los - (Watts)
s
2.5
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
130
120
110
100
90
80
70
60
0
see note (2)
2
DC
1.5
RMS Limit
1
S
quare wave (D = 0.50)
80% Rated V
R
applied
0.5
0.5
1
1.5
2
2.5
3
0
0
0.5
1
1.5
2
2.5
3
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Non-Repetitive S
urge Current - I
FSM
(A)
1000
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following S
urge
100
10
10
100
1000
10000
S
quare Wave Pulse Duration - t p (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-S
PEED
S CH
WIT
FREE-WHEEL
DIODE
40HF
L40S
02
+
DUT
IR P460
F
R = 25 ohm
g
Vd = 25 Volt
CURR
ENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
(2)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
Document Number: 93272
www.vishay.com
4
20CJQ045
Bulletin PD-20478 rev. H
07/06
Outline Table
Conform to JEDEC Outline SOT-223 (TO-261AA)
Dimensions in millimeters and (inches)
Marking Information
Document Number: 93272
www.vishay.com
5
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