STMICROELECTRONICS BAT30F3

BAT30F3
Small signal Schottky diode
Features
■
very low conduction losses
■
negligible switching losses
■
low capacitance diode
■
Flip Chip, 2-bump package
Complies with the following standards
■
Flip Chip
(2 bumps)
IEC 61000-4-2 level 1:
– ±2kV (air discharge)
– ±2kV (contact discharge)
Figure 1.
Description
Pin configuration (bump side)
1
The BAT30F3 is a Schottky diode in a 2-bump,
Flip-Chip package.
A
This device is specially suited for switching mode
applications needing a low forward voltage drop
diode.
The electrical parameters are guaranteed across
the operating temperature range
(- 30 °C to 85 °C).
B
Figure 2.
Schematic
1
A
B
October 2010
Doc ID 16915 Rev 2
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10
Characteristics
1
BAT30F3
Characteristics
Table 1.
Absolute maximum ratings (Tamb = 25 °C)
Symbol
VPP
VRRM
1.
Parameter
Value
Unit
Peak pulse voltage:
IEC 61000-4-2 air discharge
IEC 61000-4-2 contact discharge
±2
±2
kV
Repetitive peak reverse voltage
20
V
-55 to +150
°C
-30 to +85
°C
range(1)
Tstg
Storage temperature
Top
Operating junction temperature range
1
dPtot <
condition to avoid thermal runaway for a diode on its own heatsink
Rth(j-a)
dTj
Table 2.
Symbol
Electrical characteristics
Parameter
Test conditions
25 °C
IR(1)
Reverse leakage current
55 °C
85 °C
25 °C
VF
Forward voltage drop
- 30 °C
Min.
Typ.
Max.
VR = 6 V
-
-
2
VR = 20 V
-
-
6
VR = 6 V
-
-
20
VR = 20 V
-
-
55
VR = 6 V
-
-
145
VR = 20 V
-
-
360
IF = 0.1 mA
-
-
200
IF = 1 mA
-
-
270
IF = 10 mA
-
-
340
IF = 100 mA
-
-
440
IF = 200 mA
-
-
500
IF = 300 mA
-
-
560
IF = 0.1 mA
-
-
300
IF = 1 mA
-
-
355
IF = 10 mA
-
-
415
IF = 100 mA
-
-
495
IF = 200 mA
-
-
545
IF = 300 mA
-
-
600
1. Pulse test: tp = 5 ms, δ < 2%
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Unit
µA
mV
BAT30F3
Characteristics
Figure 3.
Leakage current versus reverse
applied voltage (typical values)
Figure 4.
IR (µA)
1.E+00
1.E+03
Forward voltage drop versus
forward current (typical values,
positive temperatures)
IFM (A)
Tj=85°C (Maximum specified values)
Tj=85°C
1.E+02
1.E-01
Tj=55°C
1.E+01
Tj = 55 °C
Tj = 25 °C
1.E-02
Tj=25°C
1.E+00
Tj = 85 °C
Tj=0°C
1.E-01
1.E-03
Tj=-30°C
1.E-02
0
5
Figure 5.
1.E+00
1.E-04
0.0
VR(V)
1.E-03
10
15
20
25
VFM (V)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
30
Forward voltage drop versus
forward current (typical values,
negative temperatures)
Figure 6.
IFM (A)
1.E+02
1.E-01
Relative variation of reverse
leakage current versus junction
temperature (typical values)
IR[Tj] / IR[Tj = 25 °C]
1.E+01
Tj=-20°C
1.E-02
1.E+00
Tj=-10°C
Tj=-30°C
1.E-01
1.E-03
VFM (V)
Tj=-30°C (Maximum specified values)
1.E-04
0.2
0.3
0.4
0.5
0.6
0.7
1.E-02
-30
Doc ID 16915 Rev 2
Tj(°C)
-20 -10
0
10
20
30
40
50
60
70
80
90
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Ordering information scheme
2
BAT30F3
Ordering information scheme
Figure 7.
Ordering information scheme
BAT30
Signal Schottky diode
VRRM = 20 V
Package
F = Flip Chip
x = 3: lead-free, pitch = 400 µm
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F3
BAT30F3
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.
Package dimensions (dimensions in mm)
0.70
9
0.28
.0
R0
0.40
G
0.37
G
0.085
0.065
Figure 8.
0.50
3
Package information
0.06
0.12
Section G-G
Doc ID 16915 Rev 2
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PCB recommendations
Flip Chip tape and reel specification (dimensions in mm)
2.0 ± 0.05
Ø 1.55 ± 0.05
4.0 ± 0.1
1.75 ± 0.1
Figure 9.
BAT30F3
3.5 ±- 0.05
0.75 ± 0.05
3
3
0.57 ± 0.05
0.43 ± 0.1
3
3
3
3
3
8.0 ± 0.3
0.20 ± 0.05
2.0 ± 0.1
User direction of unreeling
All dimensions in mm
4
PCB recommendations
4.1
Design
For optimum electrical performance and highly reliable solder joints, STMicroelectronics
recommends the PCB design recommendations listed in Table 3.
Table 3.
PCB design recommendations for solder bar pitch 400 µm
For NSMD PCB
non solder mask defined
Note:
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Oblong pad: 370 x 180 µm
– Micro via SSBU allowed
– Micro via SBU to be avoided
– Micro via SBU filled (under qualification)
Track:
– Only one track per pad
– Maximum track width = 100 µm
Track layout must be symmetrical to the die axis (to homogenize stress
and welding attraction during reflow assembly)
For SMD PCB
solder mask defined
Oblong pad:
– Micro via SSBU allowed
– Micro via SBU to be avoided
– Micro via SBU filled (under qualification)
PCB Pad Finishing
Cu – Ni (2-6 µm) - Au (0.2 µm max)
A gold layer finishing on the PCB pad that is too thick (0.2 µm maximum) is not
recommended (low joint reliability).
Doc ID 16915 Rev 2
BAT30F3
PCB recommendations
To optimize the natural self centering effect of CSP on the PCB, PCB pad positioning and
size have to be properly designed (see Figure 10)
Micro vias
An alternative to routing on the top surface is to route out on buried layers. To achieve this,
the pads are connected to the lower layers using micro vias. Only SSBU via technology is
approved.
Figure 10. Solder mask opening
450 µm
370 µm
370 µm
180 µm
255 µm 180 µm
100 µm
Non solder mask defined
Doc ID 16915 Rev 2
Solder mask defined
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PCB recommendations
4.2
BAT30F3
Assembly
For chip scale package mounting on the PCB, STMicroelectronics recommends the use of a
solder stencil aperture of 330 x 330 µm maximum and a typical stencil thickness of 75 or
80 µm. Chip scale packages are fully compatible with the use of near eutectic 95.5 Sn, 4 Ag,
0.5 Cu solder paste with no-clean flux. ST's recommendations for chip scale package board
mounting are illustrated on the soldering reflow profile shown in Figure 11.
Figure 11. ST ECOPACK® recommended soldering reflow profile for PCB mounting
Temperature (°C)
260°C max
255°C
220°C
180°C
125 °C
2°C/s recommended
2°C/s recommended
6°C/s max
6°C/s max
3°C/s max
3°C/s max
0
0
1
2
3
4
5
10-30 sec
90 to 150 sec
6
7
Time (min)
90 sec max
Dwell time in the soldering zone (with temperature higher than 220 °C) has to be kept as
short as possible to prevent component and substrate damage. Peak temperature must not
exceed 260 °C. Controlled atmosphere (N2 or N2H2) is recommended during the whole
reflow, especially above 150 °C.
Chip scale packages are able to withstand three times the previous recommended reflow
profile in order to be compatible with a double reflow when SMDs are mounted on both sides
of the PCB and one additional repair.
A maximum of three soldering reflows are allowed for these lead-free packages (with repair
step included).
The use of a no-clean flux is highly recommended to avoid any cleaning operation. To
prevent any bump cracks, ultrasonic cleaning methods are not recommended.
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BAT30F3
5
Ordering information
Ordering information
Table 4.
6
Ordering information
Order code
Marking
Package
Weight
Base qty
Delivery mode
BAT30F3
3
Flip Chip
0.3 mg
15000
Tape and reel 7”
Revision history
Table 5.
Document revision history
Date
Revision
Changes
14-Dec-2009
1
Initial release.
21-Oct-2010
2
Updated dot graphic in Figure 1.
Doc ID 16915 Rev 2
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BAT30F3
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