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BAT54LT1 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BAT54LT1
기능 Schottky Barrier Diodes
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BAT54LT1 데이터시트, 핀배열, 회로
BAT54LT1
Preferred Device
Schottky Barrier Diodes
These Schottky barrier diodes are designed for high speed switching
applications, circuit protection, and voltage clamping. Extremely low
forward voltage reduces conduction loss. Miniature surface mount
package is excellent for hand held and portable applications where
space is limited.
Extremely Fast Switching Speed
Low Forward Voltage – 0.35 Volts (Typ) @ IF = 10 mAdc
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30 VOLTS
SILICON HOT–CARRIER
DETECTOR AND SWITCHING
DIODES
3
CATHODE
1
ANODE
MAXIMUM RATINGS (TJ = 125°C unless otherwise noted)
Rating
Symbol
Value
Unit
Reverse Voltage
Forward Power Dissipation
@ TA = 25°C
Derate above 25°C
VR
PF
30 Volts
200 mW
2.0 mW/°C
Forward Current (DC)
Junction Temperature
Storage Temperature Range
IF
200 Max
mA
TJ 125 Max °C
Tstg –55 to +150
°C
MARKING
DIAGRAM
3
3
JV3
1
2
(TO–236AB)
SOT–23
CASE 318
STYLE 8
1
2
ORDERING INFORMATION
Device
Package
Shipping
BAT54LT1
SOT–23 3000/Tape & Reel
Preferred devices are recommended choices for future use
and best overall value.
© Semiconductor Components Industries, LLC, 2000
November, 2000 – Rev. 6
Publication Order Number:
BAT54LT1/D




BAT54LT1 pdf, 반도체, 판매, 대치품
BAT54LT1
INFORMATION FOR USING THE SOT–23 SURFACE MOUNT PACKAGE
MINIMUM RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a critical portion of the total
design. The footprint for the semiconductor packages must
be the correct size to insure proper solder connection
interface between the board and the package. With the
correct pad geometry, the packages will self align when
subjected to a solder reflow process.
0.037
0.95
0.037
0.95
0.035
0.9
0.079
2.0
0.031
0.8
SOT–23
inches
mm
SOT–23 POWER DISSIPATION
The power dissipation of the SOT–23 is a function of the
drain pad size. This can vary from the minimum pad size for
soldering to a pad size given for maximum power
dissipation. Power dissipation for a surface mount device is
determined by TJ(max), the maximum rated junction
temperature of the die, RθJA, the thermal resistance from the
device junction to ambient, and the operating temperature,
TA. Using the values provided on the data sheet for the
SOT–23 package, PD can be calculated as follows:
PD =
TJ(max) – TA
RθJA
The values for the equation are found in the maximum
ratings table on the data sheet. Substituting these values into
the equation for an ambient temperature TA of 25°C, one can
calculate the power dissipation of the device which in this
case is 225 milliwatts.
PD =
150°C – 25°C
556°C/W
= 225 milliwatts
The 556°C/W for the SOT–23 package assumes the use of
the recommended footprint on a glass epoxy printed circuit
board to achieve a power dissipation of 225 milliwatts.
There are other alternatives to achieving higher power
dissipation from the SOT–23 package. Another alternative
would be to use a ceramic substrate or an aluminum core
board such as Thermal Clad. Using a board material such
as Thermal Clad, an aluminum core board, the power
dissipation can be doubled using the same footprint.
SOLDERING PRECAUTIONS
The melting temperature of solder is higher than the rated
temperature of the device. When the entire device is heated
to a high temperature, failure to complete soldering within
a short time could result in device failure. Therefore, the
following items should always be observed in order to
minimize the thermal stress to which the devices are
subjected.
Always preheat the device.
The delta temperature between the preheat and
soldering should be 100°C or less.*
When preheating and soldering, the temperature of the
leads and the case must not exceed the maximum
temperature ratings as shown on the data sheet. When
using infrared heating with the reflow soldering
method, the difference shall be a maximum of 10°C.
The soldering temperature and time shall not exceed
260°C for more than 10 seconds.
When shifting from preheating to soldering, the
maximum temperature gradient shall be 5°C or less.
After soldering has been completed, the device should
be allowed to cool naturally for at least three minutes.
Gradual cooling should be used as the use of forced
cooling will increase the temperature gradient and
result in latent failure due to mechanical stress.
Mechanical stress or shock should not be applied
during cooling.
* Soldering a device without preheating can cause
excessive thermal shock and stress which can result in
damage to the device.
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