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LM4040D50QFTA bảng dữ liệu(PDF) 9 Page - Diodes Incorporated

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Giải thích chi tiết về linh kiện  AUTOMOTIVE GRADE PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES
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LM4040D50QFTA bảng dữ liệu(HTML) 9 Page - Diodes Incorporated

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LM4040Q
Document number: DS36989 Rev. 1 - 2
9 of 11
www.diodes.com
October 2015
© Diodes Incorporated
LM4040Q
Application Information
In a conventional shunt regulator application (Figure 1), an external series resistor (RS) is connected between the supply voltage, VS, and the
LM4040.
RS determines the current that flows through the load (IL) and the LM4040 (IR). Since load current and supply voltage may
vary, RS should be small enough to supply at least the minimum acceptable IR to the LM4040 even when the supply voltage
is at its minimum and the load current is at its maximum value. When the supply voltage is at its maximum and IL is at its
minimum, RS should be large enough so that the current flowing through the LM4040 is less than 15 mA.
RS is determined by the supply voltage, (VS), the load and operating current, (IL and IR), and the LM4040’s reverse
breakdown voltage, VR.
R
L
R
S
S
I
I
V
V
R
Printed circuit board layout considerations
LM4040Qs in the SOT23 package have the die attached to pin 1, which results in an electrical contact between pin 2 and pin
3. Therefore, pin 1 of the SOT-23 package must be left floating or connected to pin 2.
Ordering Information
Order Code
+25°C
Tol
Voltage
(V)
Package
(Note 6)
Package
Code
Identification
Code
Packing: 7” Tape and Reel
Qualification Grade
(Note 7)
Quantity Tape Width Part Number Suffix
LM4040B25QFTA
0.2%
2.5
SOT23
F
R2B
3,000
8mm
TA
Automotive Grade
LM4040B30QFTA
3.0
SOT23
F
R3B
3,000
8mm
TA
Automotive Grade
LM4040B50QFTA
5.0
SOT23
F
R5B
3,000
8mm
TA
Automotive Grade
LM4040C25QFTA
0.5%
2.5
SOT23
F
R2C
3,000
8mm
TA
Automotive Grade
LM4040C30QFTA
3.0
SOT23
F
R3C
3,000
8mm
TA
Automotive Grade
LM4040C50QFTA
5.0
SOT23
F
R5C
3,000
8mm
TA
Automotive Grade
LM4040D25QFTA
1%
2.5
SOT23
F
R2D
3,000
8mm
TA
Automotive Grade
LM4040D30QFTA
3.0
SOT23
F
R3D
3,000
8mm
TA
Automotive Grade
LM4040D50QFTA
5.0
SOT23
F
R5D
3,000
8mm
TA
Automotive Grade
Note:
6. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
7
. LM4040Q is classified as “Automotive Grade” and supports PPAP documentation. See LM4040 datasheet for commercial qualified versions.
RS
VS
IR +
IL
IR
IL
VR


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