Automotive small signal Schottky diodes
Features
■ Low conduction and reverse losses
■ Negligible switching losses
■ Low forward and reverse recovery times
■ Extremely fast switching
■ Surface mount device
■ Low capacitance diode
■ ECOPACK
■ AEC-Q101 qualified
Description
The BAT54 series uses 40 V Schottky barrier
diodes packaged in SOT-23, SOT-323. These
devices are suitable for automotive application.
®
2 compliant component
SOT-23
SOT-323
BAT54-Y
BAT54FILMY
(Single)
BAT54SFILMY
(Series)
BAT54WFILMY
(Single)
BAT54CWFILMY
(Common cathode)
BAT54AWFILMY
(Common anode)
Configurations in top view
Table 1. Device summary
Symbol Value
I
F
V
RRM
(typ) 7 pF
C
(max) 150 °C
T
j
300 mA
40 V
November 2011 Doc ID 17696 Rev 1 1/9
www.st.com
9
Characteristics BAT54-Y
1 Characteristics
Table 2. Absolute ratings (limiting values at Tj = 25 °C, unless otherwise specified)
Symbol Parameter Value Unit
V
I
T
Table 3. Thermal parameters
Repetitive peak reverse voltage 40 V
RRM
Continuous forward current 300 mA
I
F
Surge non repetitive forward current tp = 10 ms sinusoidal 1 A
FSM
Storage temperature range -65 to +150 °C
stg
Operating junction temperature range -40 to +150 °C
T
j
T
Maximum soldering temperature 260 °C
L
Symbol Parameter Value Unit
R
1. Epoxy printed circuit board with recommended pad layout
Table 4. Static electrical characteristics
Junction to ambient
th(j-a)
(1)
SOT-23 500 °C/W
SOT-323 550 °C/W
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 25 °C
T
Reverse leakage
(1)
I
R
current
j
= 100 °C 100
T
j
VR = 30 V
1
IF = 0.1 mA 240
I
= 1 mA 320
F
(2)
V
1. Pulse test: tp = 5 ms, δ < 2 %
2. Pulse test: tp = 380 µs, δ < 2 %
Table 5. Dynamic characteristics
Symbol Parameter
Forward voltage drop Tj = 25 °C
F
Test conditions
= 10 mA 400
I
F
= 30 mA 500
I
F
I
= 100 mA 900
F
Min. Typ. Max. Unit
µA
mV
Diode
C
t
rr
capacitance
Reverse
recovery time
V
= 1 V, F = 1 MHz 7 10 pF
R
IF = 10 mA, IR = 10 mA, Tj = 25 °C
= 1 mA, RL = 100 Ω
I
rr
2/9 Doc ID 17696 Rev 1
5ns
BAT54-Y Characteristics
Figure 1. Average forward power dissipation
versus average forward current
P(W)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35
δ=0.05
δ=0.2
δ=0.1
I
F(AV)
δ=0.5
(A)
δ
=tp/T
δ=1
T
tp
Figure 3. Reverse leakage current versus
reverse applied voltage
(typical values)
IR(µA)
1.E+02
Tj=100°C
1.E+01
1.E+00
1.E-01
1.E-02
0 5 10 15 20 25 30
Tj=50°C
Tj=25°C
VR(V)
Figure 2. Average forward current versus
ambient temperature (δ = 1)
I
(A)
F(AV)
0.35
0.30
0.25
0.20
0.15
δ
=tp/T
T
tp
T
(°C)
amb
0.10
0.05
0.00
0 25 50 75 100 125 150
Figure 4. Reverse leakage current versus
junction temperature
IR[Tj]/IR[Tj=25°C]
1.E+04
VR=3V
1.E+03
1.E+02
1.E+01
1.E+00
1.E-01
0 25 50 75 100 125 150
Tj(°C)
Figure 5. Junction capacitance versus
reverse applied voltage
(typical values)
C(pF)
10
1
1 10 100
VR(V)
V
F=1MHz
OSC
Tj=25°C
=30mV
Figure 6. Forward voltage drop versus
forward current (typical values)
IFM(A)
1.E+00
RMS
1.E-01
1.E-02
1.E-03
1.E-04
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3
Doc ID 17696 Rev 1 3/9
Tj=100°CTj=100°C
Tj=50°CTj=50°C
Tj=25°CTj=25°C
Tj=-40 °CTj=-40 °C
VFM(V)
Characteristics BAT54-Y
Figure 7. Relative variation of thermal impedance junction to ambient versus pulse duration
(SOT-23)
Z
th(j-a)/Rth(j-a)
1.E+00
Single pulse
SOT23
1.E-01
Alumine substrate
1.E-02
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02
tP(s)
10 x 8 x 0.5 mm
4/9 Doc ID 17696 Rev 1
BAT54-Y Ordering information scheme
2 Ordering information scheme
Figure 8. Ordering information scheme
BAT54 xx xx FILM Y
Signal Schottky diodes
V = 40 V
RRM
Configuration
No letter = Single diode
A = Common anode
C = Common cathode
S = Series diodes
Package
Blank = SOT-23
W = SOT-323
Packing
FILM = Tape and reel
Automotive grade
Doc ID 17696 Rev 1 5/9
Package information BAT54-Y
3 Package information
● Epoxy meets UL94, V0
● Lead-free packages
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com
ECOPACK
Table 6. SOT-23 dimensions
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
.
Dimensions
Ref.
A
E
Millimeters Inches
Min. Max. Min. Max.
A 0.89 1.4 0.035 0.055
e
B
e1
A1 0 0.1 0 0.004
B 0.3 0.51 0.012 0.02
D
c 0.085 0.18 0.003 0.007
S
A1
D 2.75 3.04 0.108 0.12
e 0.85 1.05 0.033 0.041
e1 1.7 2.1 0.067 0.083
c
L
H
E 1.2 1.6 0.047 0.063
H 2.1 2.75 0.083 0.108
L 0.6 typ. 0.024 typ.
S 0.35 0.65 0.014 0.026
Figure 9. SOT-23 footprint (dimensions in mm)
0.95 0.61
0.73
6/9 Doc ID 17696 Rev 1
1.26
3.25
BAT54-Y Package information
Table 7. SOT-323 dimensions
Dimensions
A
E
Ref.
Min. Typ. Max. Min. Typ. Max.
A 0.8 1.1 0.031 0.043
e
b
A1 0.0 0.1 0.0 0.004
D
b 0.25 0.4 0.010 0.016
c 0.1 0.26 0.004 0.010
A1
D 1.8 2.0 2.2 0.071 0.079 0.086
E 1.15 1.25 1.35 0.045 0.049 0.053
e 0.65 0.026
c
θ
L
H
H 1.8 2.1 2.4 0.071 0.083 0.094
L 0.1 0.2 0.3 0.004 0.008 0.012
q 0 30° 0 30°
Figure 10. SOT-323 footprint (dimensions in mm)
0.95
Millimeters Inches
1.0
0.500.8
2.9
Doc ID 17696 Rev 1 7/9
Ordering information BAT54-Y
4 Ordering information
Table 8. Ordering information
Order code Marking Package Weight Base qty Delivery mode
BAT54FILMY 86Y SOT-23 Single 10 mg
BAT54SFILMY 88Y SOT-23 Serial 10 mg
BAT54WFILMY 73Y SOT-323 Single 6 mg
3000 Tape and reel
BAT54CWFILMY 77Y
SOT-323
Common cathode
6 mg
BAT54AWFILMY 74Y
5 Revision history
Table 9. Document revision history
Date Revision Changes
04-Nov-2011 1 Initial release.
SOT-323
Common anode
6 mg
8/9 Doc ID 17696 Rev 1
BAT54-Y
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Doc ID 17696 Rev 1 9/9
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