October 2009 Doc ID 5505 Rev 10 1/13
13
BAT54
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
Description
The BAT54 series uses 40 V Schottky barrier
diodes packaged in SOD- 23, SOD-323,
SOD-523, SOT-23, SOT-323, or SOT-666.
Table 1. Device summary
Symbol Value
IF300 mA
VRRM 40 V
C (typ) 7 pF
Tj (max) 150 °C
SOD-323
SOD-123
SOD-523
SOT-23
SOT-666
BAT54JFILM
(Single)
BAT54JFILM-H
BAT54ZFILM
(Single)
BAT54KFILM
(Single)
BAT54FILM
(Single)
BAT54SFILM
(Series)
BAT54CFILM
(Common cathode)
BAT54WFILM
(Single)
BAT54CWFILM
(Common cathode)
BAT54AWFILM
(Common anode)
BAT54SWFILM
(Series)
BAT54-07P6FILM
(2 parallel diodes)
BAT54-09P6FILM
(2 opposite diodes)
BAT54AFILM
(Common anode)
SOT-323
Configurations in top view
www.st.com
Characteristics BAT54
2/13 Doc ID 5505 Rev 10
1 Characteristics
Table 2. Absolute ratings (limiting values at Tj = 25 °C, unless otherwise specified)
Symbol Parameter Value Unit
VRRM Repetitive peak reverse voltage 40 V
IFContinuous forward current 300 mA
IFSM Surge non repetitive forward current tp = 10 ms Sinusoidal 1 A
Tstg Storage temperature range -65 to +150 °C
TjOperating junction temperature range -40 to +150 °C
TLMaximum soldering temperature 260 °C
Table 3. Thermal parameters
Symbol Parameter Value Unit
Rth(j-a) Junction to ambient(1)
1. Epoxy printed circuit board with recommended pad layout
SOT-23, SOD-123 500 °C/W
SOT-323, SOD-323, 550
SOD-523, SOT-666 600
Table 4. Static electrical characteristics
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 = 30 V 1µA
Tj = 100 °C 100
VF(2)
2. Pulse test: tp = 380 µs, δ < 2 %
Forward voltage drop Tj = 25 °C
IF = 0.1 mA 240
mV
IF = 1 mA 320
IF = 10 mA 400
IF = 30 mA 500
IF = 100 mA 900
Table 5. Dynamic characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
CDiode
capacitance VR = 1 V, F = 1 MHz 7 10 pF
trr
Reverse
recovery time
IF = 10 mA, IR = 10 mA, Tj = 25 °C
Irr = 1 mA, RL = 100 Ω5ns
BAT54 Characteristics
Doc ID 5505 Rev 10 3/13
Figure 1. Average forward power dissipation
versus average forward current
Figure 2. Average forward current versus
ambient temperature (δ = 1)
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35
P(W)
δ=0.05 δ=0.2 δ=0.1 δ=0.5 δ=1
T
δ=tp/T tp
IF(AV)(A)
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0 25 50 75 100 125 150
I
F(AV)
(A)
T
δ=tp/T tp Tamb(°C)
Figure 3. Reverse leakage current versus
reverse applied voltage
(typical values)
Figure 4. Reverse leakage current versus
junction temperature
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0 5 10 15 20 25 30
I
R
(µA)
Tj=100°C
Tj=25°C
Tj=50°C
VR(V)
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
0 25 50 75 100 125 150
I
R
[T
j
]/I
R
[T
j
=25°C]
VR=3V
Tj(°C)
Figure 5. Junction capacitance versus
reverse applied voltage
(typical values)
Figure 6. Forward voltage drop versus
forward current (typical values)
1
10
1 10 100
C(pF)
F=1MHz
VOSC=30mVRMS
Tj=25°C
VR(V)
1.E-04
1.E-03
1.E-02
1.E-01
1.E+00
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
I
FM
(A)
Tj=50°CTj=50°C
Tj=25°CTj=25°C
Tj=-40 °CTj=-40 °C
Tj=100°CTj=100°C
VFM(V)
Characteristics BAT54
4/13 Doc ID 5505 Rev 10
Figure 11. Relative variation of thermal impedance junction to ambient versus pulse duration
Figure 7. Thermal resistance junction to
ambient versus copper surface
under each lead (SOD-323)
Figure 8. Relative variation of thermal
impedance junction to ambient
versus pulse duration (SOD-323)
200
300
400
500
600
0 5 10 15 20 25 30 35 40 45 50
R
th(j-a)
(°C/W)
Epoxy FR4
eCU=35 µm
SCU(mm²)
1.E-03
1.E-02
1.E-01
1.E+00
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03
Z
th(j-a)
/R
th(j-a)
Single pulse
SOD323
Epoxy FR4
SCU=2.25 mm²
eCU=35 µm
tP(s)
Figure 9. Relative variation of thermal
impedance junction to ambient
versus pulse duration (SOT-23)
Figure 10. Relative variation of thermal
impedance junction to ambient
versus pulse duration (SOD-523)
1.E-02
1.E-01
1.E+00
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02
Z
th(j-a)
/R
th(j-a)
Alumine substrate
10 x 8 x 0.5 mm
Single pulse
SOT23
tP(s)
1.E-03
1.E-02
1.E-01
1.E+00
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01
Z
th(j-a)
/R
th(j-a)
Single pulse
SOD523
Epoxy FR4
eCU=35 µm
tP(s)
1.E-02
1.E-01
1.E+00
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01
Z
th(j-a)
/R
th(j-a)
Single pulse
SOT666
Epoxy FR4
eCU=35 µm
tP(s)
BAT54 Ordering information scheme
Doc ID 5505 Rev 10 5/13
2 Ordering information scheme
Figure 12. Ordering information scheme
BAT54 xx xx FILM
Signal Schottky diodes
Package
Packing
V = 40 V
RRM
No letter = Single diode
A = Common anode
C = Common cathode
S = Series diodes
07 = Parallel diodes
09 = Opposite diodes
Blank = SOT-23
J = SOD-323
W = SOT-323
K = SOD-523
P6 = SOT-666
Z = SOD-123
FILM = Tape and reel
Configuration
Package information BAT54
6/13 Doc ID 5505 Rev 10
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® 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.
Figure 13. SOD-123 footprint (dimensions in mm)
Table 6. SOD-123 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 1.45 0.057
A1 0 0.1 0 0.004
A2 0.85 1.35 0.033 0.053
b 0.55 Typ. 0.022 Typ.
c 0.15 Typ. 0.039 Typ.
D 2.55 2.85 0.1 0.112
E 1.4 1.7 0.055 0.067
G0.25 0.01
H 3.55 3.95 0.14 0.156
H
b
D
E
A1
A2
A
G
c
4.45
0.65
2.510.97 0.97
BAT54 Package information
Doc ID 5505 Rev 10 7/13
Figure 14. SOD-323 footprint (dimensions in mm)
Table 7. SOD-323 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 1.17 0.046
A1 0 0.1 0 0.004
b 0.25 0.44 0.01 0.017
c 0.1 0.25 0.004 0.01
D 1.52 1.8 0.06 0.071
E 1.11 1.45 0.044 0.057
H 2.3 2.7 0.09 0.106
L 0.1 0.46 0.004 0.02
Q1 0.1 0.41 0.004 0.016
H
b
D
E
A1
A
L
Q1
c
3.20
0.54
1.081.06 1.06
Package information BAT54
8/13 Doc ID 5505 Rev 10
Figure 15. SOD-523 footprint (dimensions in mm)
Table 8. SOD-523 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.50 0.60 0.70 0.020 0.024 0.028
E 1.50 1.60 1.70 0.059 0.063 0.067
E1 1.10 1.20 1.30 0.043 0.047 0.051
D 0.70 0.80 0.90 0.028 0.031 0.035
b 0.25 0.35 0.010 0.014
c 0.07 0.20 0.003 0.008
L 0.15 0.20 0.25 0.006 0.008 0.010
L1 0.05 0.20 0.002 0.008
E1
2xb
SEATING PLANE
R0.1
c
L
D
E0.15
0.20
C
C
A
A
B
B
B
A
C
A
L1
M
M
0.7
0.3
2
BAT54 Package information
Doc ID 5505 Rev 10 9/13
Figure 16. SOT-23 footprint (dimensions in mm)
Table 9. SOT-23 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 0.89 1.4 0.035 0.055
A1 0 0.1 0 0.004
B 0.3 0.51 0.012 0.02
c 0.085 0.18 0.003 0.007
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
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
A1
A
L
H
B
E
D
e
e1
S
c
0.95 0.61
1.26
3.25
0.73
Package information BAT54
10/13 Doc ID 5505 Rev 10
Figure 17. SOT-323 footprint (dimensions in mm)
Table 10. SOT-323 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.8 1.1 0.031 0.043
A1 0.0 0.1 0.0 0.004
b 0.25 0.4 0.010 0.016
c 0.1 0.26 0.004 0.010
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
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°
A1
A
L
H
c
b
E
D
e
θ
0.95
1.0 2.9
0.500.8
BAT54 Package information
Doc ID 5505 Rev 10 11/13
Figure 18. SOT-666 footprint (dimensions in mm)
Table 11. SOT-666 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.45 0.60 0.018 0.024
A3 0.08 0.18 0.003 0.007
b 0.17 0.34 0.007 0.013
b1 0.19 0.27 0.34 0.007 0.011 0.013
D 1.50 1.70 0.059 0.067
E 1.50 1.70 0.059 0.067
E1 1.10 1.30 0.043 0.051
e0.50 0.020
L1 0.19 0.007
L2 0.10 0.30 0.004 0.012
L3 0.10 0.004
D
b
L3
L1
e
b1
E1
L2
E
A
A3
0.50
2.60
0.62
0.30
0.99
Ordering information BAT54
12/13 Doc ID 5505 Rev 10
4 Ordering information
5 Revision history
Table 12. Ordering information
Order code Marking Package Weight Base qty Delivery mode
BAT54FILM D86 SOT-23 Single 10 mg 3000 Tape and reel
BAT54SFILM D88 SOT-23 Serial 10 mg 3000 Tape and reel
BAT54CFILM D87 SOT-23
Common cathode 10 mg 3000 Tape and reel
BAT54AFILM D84 SOT-23
Common anode 10 mg 3000 Tape and reel
BAT54WFILM D73 SOT-323 Single 6 mg 3000 Tape and reel
BAT54SWFILM D78 SOT-323 Serial 6 mg 3000 Tape and reel
BAT54CWFILM D77 SOT-323
Common cathode 6 mg 3000 Tape and reel
BAT54AWFILM D74 SOT-323
Common anode 6 mg 3000 Tape and reel
BAT54JFILM 86 SOD-323 5 mg 3000 Tape and reel
BAT54JFILM-H 86
SOD-323
ECOPACK®2
halogen-free
5 mg 3000 Tape and reel
BAT54KFILM 86 SOD-523 1.4 mg 3000 Tape and reel
BAT54-07P6FILM P4 SOT-666 Parallel 2.9 mg 3000 Tape and reel
BAT54-09P6FILM Q4 SOT-666 Opposite 2.9 mg 3000 Tape and reel
BAT54ZFILM D72 SOD-123 10 mg 3000 Tape and reel
Table 13. Document revision history
Date Revision Changes
Jun-1999 8 Last update.
24-Jul-2006 9
BAT54, A, C, S and BAT54J / W / AW / CW /SW datasheets merged.
ECOPACK statement added. SOD-123, SOD-523 and SOT-666
packages added.
13-Oct-2009 10 Updated Table 8 quote “L1” from 0.10 to 0.05.
BAT54
Doc ID 5505 Rev 10 13/13
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