STPS1L20MF
Low drop power Schottky rectifier in flat package
Features
A
■
Very low profile package: 0.85 mm
■
Backward compatible with standard STmite
footprint
■
Very small conduction losses
■
Negligible switching losses
■
Extremely fast switching
■
Low forward voltage drop for higher efficiency
and extended battery life
■
Low thermal resistance
■
Avalanche capability specified
K
STmite flat
(DO222-AA)
Table 1.
Description
Single Schottky rectifier suited for switch mode
power supplies and high frequency dc to dc
converters.
Device summary
Symbol
Value
IF(AV)
1A
VRRM
20 V
Tj (max)
150 °C
VF (max)
0.37 V
Packaged in STmite flat, this device is intended
for use in low voltage, high frequency inverters,
free wheeling and polarity protection applications.
Due to the very small size of the package this
device fits battery powered equipment (cellular,
notebook, PDA’s, printers) as well as chargers
and PCMCIA cards.
July 2011
Doc ID 12640 Rev 2
1/7
www.st.com
7
Characteristics
1
STPS1L20MF
Characteristics
Table 2.
Absolute ratings (limiting values)
Symbol
Value
Unit
VRRM
Repetitive peak reverse voltage
20
V
IF(RMS)
Forward current rms
2
A
IF(AV)
Average forward current
Tc = 140 °C δ = 0.5
1
A
IFSM
Surge non repetitive forward current
tp = 10 ms sinusoidal
50
A
PARM
Repetitive peak avalanche power
tp = 1 µs Tj = 25 °C
1400
W
- 65 to + 150
°C
150
°C
10000
V/µs
Value
Unit
20
°C/W
250
°C/W
Tstg
Storage temperature range
(1)
Tj
Maximum operating junction temperature
dV/dt
1.
Parameter
dPtot
--------------dTj
Critical rate of rise of reverse voltage (rated VR, Tj = 25 °C)
<
Table 3.
1
-------------------------Rth ( j – a )
condition to avoid thermal runaway for a diode on its own heatsink
Thermal resistance
Symbol
Rth(j-c)
Parameter
Junction to case
Rth(j-a)(1) Junction to ambient
1. Mounted with minimum recommended pad size, PC board FR4
Table 4.
Symbol
Static electrical characteristics
Parameter
Tests conditions
Tj = 25 °C
Tj = 85 °C
IR (1)
Reverse leakage current
Tj = 25 °C
Tj = 85 °C
Tj = 25 °C
Tj = 85 °C
Tj = 25 °C
Tj = 85 °C
Tj = 25 °C
VF (1)
Forward voltage drop
Tj = 85 °C
Tj = 25 °C
Tj = 85 °C
Tj = 25 °C
Tj = 85 °C
Min.
VR = VRRM
VR = 10 V
VR = 5 V
IF = 1 A
IF = 2 A
Max.
0.015
0.075
0.90
4.50
0.005
0.035
0.45
2.50
0.003
0.025
0.30
1.60
0.38
0.43
0.32
0.37
0.42
0.47
0.37
0.42
0.46
0.53
0.42
0.49
0.50
0.60
0.46
0.56
Unit
mA
V
IF = 3 A
IF = 4 A
1. Pulse test: = 380 µs, δ < 2%
To evaluate the conduction losses use the following equation:
P = 0.32 x IF(AV) + 0.05 IF2(RMS)
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Typ.
Doc ID 12640 Rev 2
STPS1L20MF
Figure 1.
Characteristics
Conduction losses versus average Figure 2.
current
PF(AV)(W)
Average forward current versus
ambient temperature (δ = 0.5)
IF(AV)(A)
0.50
δ = 0.1
0.45
δ = 0.2
1.1
δ = 0.5
Rth(j-a)=Rth(j-c)
1.0
δ = 0.05
0.40
0.9
δ=1
0.35
0.8
0.7
0.30
0.6
Rth(j-a)=270°C/W
0.25
0.5
0.20
0.4
0.15
0.3
T
0.10
0.2
0.05
IF(AV)(A)
0.0
0.1
0.2
Figure 3.
0.3
0.4
0.5
0.6
0.1
δ=tp/T
0.00
0.7
0.8
0.9
1.0
0.0
1.1
0
1.2
Normalized avalanche power
derating versus pulse duration
25
Figure 4.
PARM(tp)
PARM(1µs)
1
Tamb(°C)
tp
1.2
50
75
100
125
150
Normalized avalanche power
derating versus junction
temperature
PARM(Tj)
PARM(25 °C)
1
0.1
0.8
0.6
0.4
0.01
0.2
tp(µs)
0.001
0.01
0.1
Figure 5.
1
10
100
1000
Non repetitive surge peak forward
current versus overload duration
(maximum values)
Tj(°C)
0
25
50
Figure 6.
IM(A)
75
100
150
125
Relative variation of thermal
impedance junction to case versus
pulse duration
Zth(j-c)/Rth(j-c)
25
1.0
0.9
20
0.8
0.7
0.6
15
TC=25°C
δ = 0.5
0.5
TC=75°C
10
0.4
0.3
5
TC=125°C
IM
t
0
1.E-03
0.1
t(s)
δ=0.5
0.2
δ = 0.2
T
δ = 0.1
Single pulse
tp(s)
δ=tp/T
0.0
1.E-02
1.E-01
1.E+00
1.E-04
Doc ID 12640 Rev 2
1.E-03
1.E-02
tp
1.E-01
3/7
Characteristics
Figure 7.
STPS1L20MF
Reverse leakage currrent versus
reverse voltage applied
(typical values)
Figure 8.
IR(mA)
Reverse leakage currrent versus
junction temperature
(typical values)
IR(mA)
1.E+02
1.E+02
Tj=150°C
VR=20V
Tj=125°C
1.E+01
1.E+01
Tj=100°C
1.E+00
1.E+00
Tj=75°C
1.E-01
1.E-01
Tj=50°C
1.E-02
1.E-02
Tj=25°C
VR(V)
Tj(°C)
1.E-03
1.E-03
0
Figure 9.
2
4
6
8
10
12
14
16
18
20
0
25
50
75
100
125
150
Figure 10. Forward voltage drop versus
forward current
Junction capacitance versus
reverse voltage applied
(typical values)
IFM(A)
C(pF)
2.0
1000
F=1MHz
VOSC=30mVRMS
Tj=25°C
1.8
Tj=85°C
(maximum values)
1.6
1.4
Tj=85°C
(typical values)
1.2
100
1.0
0.8
0.6
0.4
0.2
VR(V)
10
Tj=25°C
(maximum values)
VFM(V)
0.0
1
10
100
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
Figure 11. Thermal resistance junction to ambient versus copper surface under tab
(epoxy printed board FR4, copper thickness = 35 µm, typical values)
Rth(j-a)(°C/W)
250
200
150
100
50
S(mm²)
0
0
4/7
20
40
60
80
100
120
140
Doc ID 12640 Rev 2
160
180
200
0.40
0.45
0.50
STPS1L20MF
2
Package information
Package information
●
Epoxy meets UL94, V0
●
Lead-free packages
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.
STmite flat dimensions
Dimensions
Ref.
L
E1
D
L1
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
0.80
0.85
0.95
0.031 0.033 0.037
L2
b
b2
b
0.40
0.55
0.65
0.016 0.022 0.026
b2
0.70
0.85
1.00
0.027 0.033 0.039
c
0.10
0.15
0.25
0.004 0.006 0.009
D
1.75
1.90
2.05
0.069 0.075 0.081
L3
E
Millimeters
c
A
E
3.60
3.80
3.90
0.142 0.150 0.154
E1
2.80
2.95
3.10
0.110 0.116 0.122
L
0.50
0.55
0.80
0.020 0.022 0.031
L1
2.10
2.40
2.60
0.083 0.094 0.102
L2
0.45
0.60
0.75
0.018 0.024 0.030
L3
0.20
0.35
0.50
0.008 0.014 0.020
Figure 12. STmite flat recommended footprint (all dimensions in mm)
0.85 0.63
2.00
0.65
0.65
0.95
1.95
4.13
Doc ID 12640 Rev 2
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Ordering information
3
Ordering information
Table 6.
4
Ordering information
Order code
Marking
Package
Weight
Base qty
Delivery mode
STPS1L20MF
F1L2
STmite flat
16 mg
12000
Tape and reel
Revision history
Table 7.
6/7
STPS1L20MF
Document revision history
Date
Revision
Changes
21-Aug-2006
1
First issue.
07-Jul-2011
2
Reformatted to current standards. Updated caption for Figure 6.
Doc ID 12640 Rev 2
STPS1L20MF
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