October 2011 Doc ID 019045 Rev 1 1/9
9
STPS20M60S
Power Schottky rectifier
Features
High current capability
Avalanche rated
Low forward voltage drop
High frequency operation
Description
The STPS20M60S is a single Schottky diode,
suited for high frequency switch mode power
supply.
Packaged in TO-220AB, I2PAK and D2PAK, this
device is intended to be used in notebook, game
station and desktop adapters, providing in these
aplications a good efficiency at both low and high
load.
Figure 1. Electrical characteristics(a)
Table 1. Device summary
Symbol Value
IF(AV) 20 A
VRRM 60 V
VF (typ) 0.365 V
Tj (max) 150 °C
a. VARM and IARM must respect the reverse safe
operating area defined in Figure 12. VAR and IAR are
pulse measurements (tp < 1 µs). VR, IR, VRRM and VF,
are static characteristics
A
A
K
K
A
A
K
K
A
A
K
TO-220AB
STPS20M60ST
I2PAK
STPS20M60SR
D2PAK
STPS20M60SG-TR
K
A
A
IF
2 x IO
IO
IR
IAR
VF(Io)
VTo VF(2xIo)
VF
V
I
I
V
VR
VRRM
"Reverse"
"Forward"
VAR
X
X
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Characteristics STPS20M60S
2/9 Doc ID 019045 Rev 1
1 Characteristics
To evaluate the conduction losses use the following equation:
P = 0.380 x IF(AV) + 0.0063 x IF2(RMS)
Table 2. Absolute ratings (limiting values with terminals 1 and 3 short circuited at
Tamb = 25 °C, unless otherwise specified)
Symbol Parameter Value Unit
VRRM Repetitive peak reverse voltage 60 V
IF(RMS) Forward rms current 90 A
IF(AV) Average forward current, δ= 0.5 Tc = 135 °C Per package 20 A
IFSM Surge non repetitive forward current tp = 10 ms sine-wave 600 A
PARM(1)
1. For temperature or pulse time duration deratings, please refer to Figure 4 and 5. More details regarding the
avalanche energy measurements and diode validation in the avalanche are provided in the application
notes AN1768 and AN2025.
Repetitive peak avalanche power Tj = 25 °C, tp = 1 µs 26400 W
VARM(2)
2. See Figure 12
Maximum repetitive peak
avalanche voltage tp < 1 µs, Tj < 150 °C, IAR < 99 A 80 V
VASM(2) Maximum single-pulse
peak avalanche voltage tp < 1 µs, Tj < 150 °C, IAR < 99 A 80 V
Tstg Storage temperature range -65 to +175 °C
TjMaximum operating junction temperature(3)
3. condition to avoid thermal runaway for a diode on its own heatsink
150 °C
Table 3. Thermal resistance
Symbol Parameter Value Unit
Rth(j-c) Junction to case 1.0 °C/W
Table 4. Static electrical characteristics (terminals 1 and 3 short circuited)
Symbol Parameter Test conditions Min. Typ. Max. Unit
IR(1)
1. Pulse test: tp = 5 ms, δ < 2 %
Reverse leakage
current
Tj = 25 °C VR = VRRM
- 30 125 µA
Tj = 125 °C - 20 75 mA
VF(2)
2. Pulse test: tp = 380 µs, δ < 2 %
Forward voltage drop
Tj = 25 °C IF = 10 A - 0.465 0.500
V
Tj = 125 °C - 0.365 0.405
Tj = 25 °C IF = 20 A - 0.520 0.565
Tj = 125 °C - 0.450 0.505
dPtot
dTj <1
Rth(j-a)
STPS20M60S Characteristics
Doc ID 019045 Rev 1 3/9
Figure 2. Average forward power dissipation
versus average forward current
Figure 3. Average forward current versus
ambient temperature (δ = 0.5)
0
2
4
6
8
10
12
14
16
18
0 4 8 1216202428
P (W)
F(AV)
δ= 1
δ= 0.5
δ= 0.2
δ= 0.1
δ= 0.05
T
δ= t / T
ptpI (A)
F(AV) 0
4
8
12
16
20
24
0 25 50 75 100 125 150
I (A)
F(AV)
Rth(j-a) = Rth(j-c)
T (°C)
amb
Figure 4. Normalized avalanche power
derating versus pulse duration
Figure 5. Normalized avalanche power
derating versus junction
temperature
0.001
0.01
0.10.01 1
0.1
10 100 1000
1
P(t
p)
P (1µs)
ARM
ARM
t (µs)
p
0
0.2
0.4
0.6
0.8
1
1.2
25 50 75 100 125 150
P(T)
P (25 °C)
ARM j
ARM
T (°C)
j
Figure 6. Non repetitive surge peak forward
current versus overload duration
(maximum values)
Figure 7. Relative variation of thermal
impedance junction to case versus
pulse duration
0
50
100
150
200
250
300
350
1.E-03 1.E-02 1.E-01 1.E+00
I (A)
M
IM
t
δ= 0.5
T = 25 °C
c
T = 75 °C
c
T = 125 °C
c
t(s)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.E-04 1.E-03 1.E-02 1.E-01 1.E+00
Z/R
th(j-c) th(j-c)
Single pulse
t (s)
p
Characteristics STPS20M60S
4/9 Doc ID 019045 Rev 1
Figure 12. Reverse safe operating area (tp < 1 µs and Tj < 150 °C)
Figure 8. Reverse leakage current versus
reverse voltage applied
(typical values)
Figure 9. Junction capacitance versus
reverse voltage applied
(typical values)
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0 102030405060
I (mA)
R
V (V)
R
T = 25 °C
j
T = 50 °C
j
T = 75 °C
j
T = 125 °C
j
T = 150 °C
j
T = 100 °C
j
100
1000
10000
1 10 100
C(pF)
V (V)
R
F = 1 MHz
V = 30 mV
T = 25 °C
osc RMS
j
Figure 10. Forward voltage drop versus
forward current
Figure 11. Thermal resistance junction to
ambient versus copper surface
under tab
0.1
1.0
10.0
100.0
1000.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2
I (A)
FM
(Maximum values)
T = 25 °C
j
(Maximum values)
T = 125 °C
j
(Typical values)
T = 125 °C
j
V (V)
FM 0
10
20
30
40
50
60
70
80
0 5 10 15 20 25 30 35 40
DPAK
2
R (°C/W)
th(j-a)
S (cm )
Cu
2
epoxy printed board copper thickness = 35 µm
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
100.0
105.0
80 85 90 95 100 105 110 115 120
I (A)
arm
I (V ) 150 °C, 1µs
arm arm
V (V)
arm
STPS20M60S Package information
Doc ID 019045 Rev 1 5/9
2 Package information
Epoxy meets UL94, V0
Cooling method: by conduction (C)
Recommended torque value: 0.4 to 0.6 N·m
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Table 5. TO-220AB dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.173 0.181
C 1.23 1.32 0.048 0.051
D 2.40 2.72 0.094 0.107
E 0.49 0.70 0.019 0.027
F 0.61 0.88 0.024 0.034
F1 1.14 1.70 0.044 0.066
F2 1.14 1.70 0.044 0.066
G 4.95 5.15 0.194 0.202
G1 2.40 2.70 0.094 0.106
H2 10 10.40 0.393 0.409
L2 16.4 Typ. 0.645 Typ.
L4 13 14 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.25 15.75 0.600 0.620
L7 6.20 6.60 0.244 0.259
L9 3.50 3.93 0.137 0.154
M 2.6 Typ. 0.102 Typ.
Dia. 3.75 3.85 0.147 0.151
A
C
D
L7
Dia
L5
L6
L9
L4
F
H2
G
G1
L2
F2
F1
E
M
Package information STPS20M60S
6/9 Doc ID 019045 Rev 1
Figure 13. D2PAK footprint (dimensions in mm)
Table 6. D2PAK dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.173 0.181
A1 2.49 2.69 0.098 0.106
A2 0.03 0.23 0.001 0.009
B 0.70 0.93 0.027 0.037
B2 1.14 1.70 0.045 0.067
C 0.45 0.60 0.017 0.024
C2 1.23 1.36 0.048 0.054
D 8.95 9.35 0.352 0.368
E 10.00 10.40 0.393 0.409
G 4.88 5.28 0.192 0.208
L 15.00 15.85 0.590 0.624
L2 1.27 1.40 0.050 0.055
L3 1.40 1.75 0.055 0.069
M 2.40 3.20 0.094 0.126
R 0.40 typ. 0.016 typ.
V2
G
L
L3
L2
B
B2
E
* FLAT ZONE NO LESS THAN 2mm
A
C2
D
R
A2
M
V2
C
A1
*
16.90
10.30
8.90 3.70
5.08
1.30
STPS20M60S Package information
Doc ID 019045 Rev 1 7/9
Table 7. I2PAK dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.173 0.181
A1 2.40 2.72 0.094 0.107
b 0.61 0.88 0.024 0.035
b1 1.14 1.70 0.044 0.067
c 0.49 0.70 0.019 0.028
c2 1.23 1.32 0.048 0.052
D 8.95 9.35 0.352 0.368
e 2.40 2.70 0.094 0.106
e1 4.95 5.15 0.195 0.203
E 10 10.40 0.394 0.409
L 13 14 0.512 0.551
L1 3.50 3.93 0.138 0.155
L2 1.27 1.40 0.050 0.055
E
L2
L1
b1
D
A1
c
c2
A
b
e
e1
L
Ordering information STPS20M60S
8/9 Doc ID 019045 Rev 1
3 Ordering information
4 Revision history
Table 8. Ordering information
Order code Marking Package Weight Base qty Delivery mode
STPS20M60ST STPS20M60ST TO-220AB 2.2 g 50 Tube
STPS20M60SR STPS20M60SR I2PAK 1.49 g 50 Tube
STPS20M60SG-TR STPS20M60SG D2PAK 1.48 g 1000 Tape and reel
Table 9. Revision history
Date Revision Changes
11-Oct-2011 1 Initial release
STPS20M60S
Doc ID 019045 Rev 1 9/9
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