Datasheet 搜索 > 稳压芯片 > TI（德州仪器） > LM2940T-8.0/NOPB 数据手册 > LM2940T-8.0/NOPB 数据手册 1/38 页
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LM2940T-8.0/NOPB 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
稳压芯片
封装:
TO-220-3
描述:
TEXAS INSTRUMENTS LM2940T-8.0/NOPB 芯片, 稳压器, LDO, 8V, 1A, TO-220
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引脚图在P3Hot
典型应用电路图在P15
原理图在P1P13
封装尺寸在P21P22P23P24P26P27P28P29
标记信息在P21P22P23P24P25
封装信息在P20P21P22P23P24P25P26P27P28P29
技术参数、封装参数在P4P18
应用领域在P1
电气规格在P4P5P6P7P8P18
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LM2940T-8.0/NOPB数据手册
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V
IN
Unregulated Input
V
OUT
Regulated Output
C1*
0.47 µF
C
OUT
**
22 µF
LM2940
I
Q
+
IN
OUT
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LM2940-N
,
LM2940C
SNVS769J –MARCH 2000–REVISED DECEMBER 2014
LM2940x 1-A Low Dropout Regulator
1 Features 3 Description
The LM2940-N and LM2940C positive voltage
1
• Input Voltage Range = 6 V to 26 V
regulators feature the ability to source 1 A of output
• Dropout Voltage Typically 0.5 V at I
OUT
= 1 A
current with a dropout voltage of typically 0.5 V and a
• Output Current in Excess of 1 A
maximum of 1 V over the entire temperature range.
Furthermore, a quiescent current reduction circuit has
• Output Voltage Trimmed Before Assembly
been included which reduces the ground current
• Reverse Battery Protection
when the differential between the input voltage and
• Internal Short Circuit Current Limit
the output voltage exceeds approximately 3 V. The
quiescent current with 1 A of output current and an
• Mirror Image Insertion Protection
input-output differential of 5 V is therefore only 30
• P
+
Product Enhancement Tested
mA. Higher quiescent currents only exist when the
regulator is in the dropout mode (V
IN
− V
OUT
≤ 3 V).
2 Applications
Designed also for vehicular applications, the LM2940-
• Post Regulator for Switching Supplies
N and LM2940C and all regulated circuitry are
• Logic Power Supplies
protected from reverse battery installations or 2-
• Industrial Instrumentation battery jumps. During line transients, such as load
dump when the input voltage can momentarily
space
exceed the specified maximum operating voltage, the
space
regulator will automatically shut down to protect both
space
the internal circuits and the load. The LM2940-N and
LM2940C cannot be harmed by temporary mirror-
image insertion. Familiar regulator features such as
short circuit and thermal overload protection are also
provided.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
SOT-223 (4) 6.50 mm x 3.50 mm
WSON (8) 4.00 mm x 4.00 mm
LM2940-N
TO-263 (3) 10.18 mm x 8.41 mm
TO-220 (3) 14.986 mm x 10.16 mm
TO-263 (3) 10.18 mm x 8.41 mm
LM2940C
TO-220 (3) 14.986 mm x 10.16 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
*Required if regulator is located far from power supply filter.
**C
OUT
must be at least 22 μF to maintain stability. May be increased without bound to maintain regulation during
transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating
temperature range as the regulator and the ESR is critical; see curve.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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