Features
■ very low turn-on voltage
■ fast switching
Description
The TMBAT49 is a general purpose metal to
silicon diode. This device has integrated
protection against excessive voltage such as
electrostatic discharges.
TMBAT49
Small signal Schottky diode
MELF
(glass)
November 2010 Doc ID 3484 Rev 2 1/6
www.st.com
6
Characteristics TMBAT49
1 Characteristics
Table 1. Absolute ratings (limiting values)
Symbol Parameter Value Unit
V
I
FRM
I
FSM
T
Table 2. Thermal parameter
Repetitive peak reverse voltage 80 V
RRM
I
Forward continuous current Tj = 70 °C 500 mA
F
Repetitive peak forward current
tp = 1 s
δ ≤ 0.5
Surge non repetitive forward current tp = 10 ms 10 A
Storage temperature range - 65 to +150 °C
stg
T
Operating junction temperature range - 65 to +125 °C
j
Maximum lead soldering temperature during 15 s 260 °C
T
L
3A
Symbol Parameter Value Unit
R
Table 3. Static electrical characteristics
Junction to lead 110 °C/W
th(j-l)
Symbol Parameter Test conditions Min. Typ. Max. Unit
(1)
I
V
1. Pulse test: tp ≤ 300 µs, δ < 2%
Table 4. Dynamic characteristics (Tj = 25 °C)
Reverse leakage current Tj = 25 °C VR = 80 V - - 200 µA
R
= 10 mA - - 0.32
I
F
(1)
Forward voltage drop Tj = 25 °C
F
= 100 mA - - 0.42
F
= 1 A - - 1
I
F
VI
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
= 0 V - 120 -
C Diode capacitance F = 1 MHz
R
= 5 V - 35 -
V
R
2/6 Doc ID 3484 Rev 2
pF
TMBAT49 Characteristics
Figure 1. Forward voltage drop versus
forward current (typical values, low
level)
I (mA)
FM
1.E+03
1.E+02
1.E+01
1.E+00
1.E-01
1.E-02
T = 25 °C
j
T = 100 °C
j
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
T = 55 °C
j
V (V)
FM
Figure 3. Reverse leakage current versus
reverse voltage applied (typical
values)
I (mA)
R
1.E+01
T = 125 °C
j
1.E+00
1.E-01
1.E-02
T = 100 °C
j
T = 75 °C
j
T = 50 °C
j
T = 25 °C
j
Figure 2. Forward voltage drop versus
forward current (typical values,
high level)
I (A)
FM
10
9
8
7
6
5
4
3
2
1
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50
T = 25 °C
j
Figure 4. Junction capacitance versus
reverse voltage applied
(typical values)
C(pF)
100
F = 1 MHz
V = 30 mV
osc
T = 25 °C
j
V (V)
FM
V (V)
1.E-03
0 1020304050607080
R
Figure 5. Non-repetitive peak surge forward
current versus pulse duration
(square waveform)
I (A)
FSM
25
20
15
10
5
t (ms)
0
0.1 1.0 10.0
p
V (V)
10
1 10 100
R
Figure 6. Non-repetitive peak surge forward
current versus number of cycles
I (A)
FSM
10
t =10 ms
p
One cycle
1
1 10 100
Number of cycles
Doc ID 3484 Rev 2 3/6
Package information TMBAT49
2 Package information
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 5. MELF package dimensions
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Dimensions
A
Ref.
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
ØB
A 4.80 5.20 0.189 0.205
ø B 2.50 2.65 0.098 0.104
ØD
C 0.45 0.60 0.018 0.024
C
C
ø D 2.50 0.098
Figure 7. Footprint (dimensions in mm)
3
4
6.5
4/6 Doc ID 3484 Rev 2
TMBAT49 Ordering information
3 Ordering information
Table 6. Ordering information
Order code Marking Package Weight Base qty Delivery mode
TMBAT49FILM Cathode ring MELF (glass) 0.15 g 1500 Bulk
4 Revision history
Table 7. Document revision history
Date Revision Changes
Aug-1999 1A Previous release.
12-Nov-2010 2 Added ECOPACK statement. Updated graphics in Section 1.
Doc ID 3484 Rev 2 5/6
TMBAT49
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