Bulletin PD-20241 rev. B 12/01
20TQ...
20TQ...S
SCHOTTKY RECTIFIER
20 Amp
I
F(AV)
= 19Amp
V
R
= 35 to 45V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 20 Apk, T
J
= 125°C
range
Description/ Features
Units
A
V
A
V
°C
The 20TQ Schottky rectifier series has been optimized for
very low forward voltage drop, with moderate leakage. The
proprietary barrier technology allows for reliable operation up
to 150° C junction temperature. Typical applications are in
switching power supplies, converters, free-wheeling diodes,
and reverse battery protection.
150° C T
J
operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
20TQ
20
35 to 45
1800
0.51
- 55 to 150
Case Styles
20TQ...
20TQ... S
Base
Cathode
2
Base
Cathode
2
1
3
1
3
Cathode
Anode
N/C
Anode
TO-220AC
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D
2
PAK
1
20TQ... Series
Bulletin PD-20241 rev. B 12/01
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
35
40
45
V
RWM
Max. Working Peak Reverse Voltage (V)
20TQ035
20TQ040
20TQ045
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
Non-Repetitive Avalanche Energy
Repetitive Avalanche Current
20TQ
20
1800
400
27
4
Units
A
Conditions
50% duty cycle @ T
C
= 116° C, rectangular wave form
5µs Sine or 3µs Rect. pulse
10ms Sine or 6ms Rect. pulse
Following any rated
load condition and
with rated V
RRM
applied
A
mJ
A
T
J
= 25 °C, I
AS
= 4 Amps, L = 3.4 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
* See Fig. 1
(1)
20TQ
0.57
0.73
0.51
0.67
Units
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 20A
@ 40A
@ 20A
@ 40A
T
J
= 25 °C
T
J
= 125 °C
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current (1)
* See Fig. 2
Max. Junction Capacitance
Typical Series Inductance
2.7
105
1400
8.0
10000
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
20TQ
-55 to 150
-55 to 150
1.50
0.50
2 (0.07)
Min.
Max.
6 (5)
12 (10)
Units
°C
°C
°C/W
°C/W
g (oz.)
Kg-cm
(Ibf-in)
DC operation
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case
R
thCS
Typical Thermal Resistance, Case to
Heatsink
wt
T
Approximate Weight
Mounting Torque
* See Fig. 4
Mounting surface , smooth and greased
2
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20TQ... Series
Bulletin PD-20241 rev. B 12/01
10
00
10
00
10
0
R v rs C rre t - I (m )
ee e u n
A
R
1
0
1
.1
.0
1
.0 1
0
0
T =1 0 C
5°
J
1 5C
2°
1 0C
0°
7°
5C
5°
0C
2°
5C
10
0
In ta ta e u F rw rdC rre t - I (A
s n nos o a
u n
)
F
5
1 1 2 2 3 3 4 4
0 5 0 5 0 5 0 5
R v rs V lta e- V (V
ee e o g
R )
1
0
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
T =1 0 C
5°
J
J n tio C p c n e- C (p )
u c n a a ita c
F
T
100
00
T =1 5 C
2°
J
T= 2°
5C
J
1
T =2 °
5C
J
10
00
.1
0
.2
.4
.6
.8
1
1
.2 1
.4
1
.6
1
.8
10
0
0
1
0
2
0
3
0
4
0
5
0
F rw rdV lta eD p- V M )
o a
o g ro
F (V
R v rs V lta e- V (V
ee e o g
)
R
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
0
T e a Im e a c - Zth C(° /W
h rm l p d n e
C )
J
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
1
.1
D=0 0
.5
D=0 3
.3
D=0 5
.2
D=0 7
.1
D=0 8
.0
P
M
D
t
1
t2
N te :
o s
1 D tyfa to D= t1/ t2
. u
c r
2 P a T =P xZ
. ek
+T
J D
M th C C
J
.0
1
.1
1
1
0
10
0
.0
1
S g P ls
in le u e
(T e a R s ta c )
h rm l e is n e
.0 1
0
.0 0 1
00
.0 0
01
.0 1
0
t , R c n u r P ls D ra n(S c n s
e ta g la u e u tio
eod)
1
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
20TQ... Series
Bulletin PD-20241 rev. B 12/01
15
5
A w b C s T m e tu - (° )
llo a le a e e p ra re C
2T
0Q
R J (D ) =1 0 C
.5 ° /W
th C C
15
4
1
8
D=0 8
.0
1 D=0 7
6
.1
D=0 5
.2
1
4
D=0 3
.3
D=0 0
.5
1
2
1 R SL it
0 M im
8
6
4
2
D
C
15
3
D
C
15
2
15
1
0
A e g P w r L s - (W tts
v ra e o e o s
a )
5
1
0
1
5
2
0
2
5
3
0
0
0
5
1
0
1
5
2
0
2
5
3
0
A e g F rw rdC rre t - IF V (A
v ra e o a
u n
(A ) )
A e g F rw rdC rre t - I
v ra e o a
u n
(A
)
F V
(A )
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
10000
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
(A)
Fig. 6 - Forward Power Loss Characteristics
Non-Repetitive Surge Current - I
FSM
1000
100
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
H IG H-SPE ED
SW ITC H
FR EE-W H E EL
D IO D E
40H FL40 S02
V d = 25 V olt
D UT
IRFP460
Rg = 25 ohm
+
C URRE NT
M O N ITO R
Fig. 8 - Unclamped Inductive Test Circuit
4
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20TQ... Series
Bulletin PD-20241 rev. B 12/01
Outline Table
10.54 (0.41)
MAX.
3.78 (0.15)
3.54 (0.14)
15.24 (0.60)
14.84 (0.58)
1
14.09 (0.55)
13.47 (0.53)
3
3.96 (0.16)
3.55 (0.14)
2.04 (0.080) MAX.
1.40 (0.05)
1.15 (0.04)
0.94 (0.04)
0.69 (0.03)
2.89 (0.11)
2.64 (0.10)
0.10 (0.004)
2.92 (0.11)
2.54 (0.10)
TERM 2
DIA.
6.48 (0.25)
6.23 (0.24)
2°
1.32 (0.05)
1.22 (0.05)
Base
Cathode
1
4.57 (0.18)
4.32 (0.17)
3
1
3
0.61 (0.02) MAX.
Cathode
Anode
5.08 (0.20) REF.
Conform to JEDEC outline TO-220AC
Dimensions in millimeters and (inches)
10.16 (0.40)
REF.
4.69 (0.18)
4.20 (0.16)
1.32 (0.05)
6.47 (0.25)
15.49 (0.61)
1.22 (0.05)
93°
6.18 (0.24)
14.73 (0.58)
2.61 (0.10)
2.32 (0.09)
8.89 (0.35)
5.28 (0.21)
4.78 (0.19)
0.55 (0.02)
0.46 (0.02)
3X
1.40 (0.055)
REF.
0.93 (0.37)
0.69 (0.27)
1.14 (0.045)
2X
Base
Cathode
2
MINIMUM RECOMMENDED FOOTPRINT
11.43 (0.45)
1
3
4.57 (0.18)
4.32 (0.17)
2
0.61 (0.02) MAX.
5.08 (0.20) REF.
8.89 (0.35)
17.78 (0.70)
3.81 (0.15)
2.08 (0.08)
2X
1
3
N/C
Anode
2.54 (0.10)
2X
Conform to JEDEC outline D Pak (SMD-220)
Dimensions in millimeters and (inches)
2
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5
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