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參數資料
| 型號： | LM2940CT-9 |
| 英文描述： | (414.81 k) |
| 中文描述： | （414.81十一） |
| 文件頁數： | 1/17頁 |
| 文件大小： | 409K |
| 代理商： | LM2940CT-9 |
LM2940/LM2940C
1A Low Dropout Regulator
General Description
The LM2940/LM2940C positive voltage regulator features
the ability to source 1A of output current with a dropout volt-
age of typically 0.5V and a maximum of 1V over the entire
temperature range. Furthermore, a quiescent current reduc-
tion circuit has been included which reduces the ground cur-
rent when the differential between the input voltage and the
output voltage exceeds approximately 3V. The quiescent
current with 1A of output current and an input-output differ-
ential of 5V is therefore only 30 mA. Higher quiescent cur-
rents only exist when the regulator is in the dropout mode
(V
IN
V
OUT
≤
3V).
Designed also for vehicular applications, the LM2940/
LM2940C and all regulated circuitry are protected from re-
verse battery installations or 2-battery jumps. During line
transients, such as load dump when the input voltage can
momentarily exceed the specified maximum operating volt-
age, the regulator will automatically shut down to protect
both the internal circuits and the load. The LM2940/
LM2940C cannot be harmed by temporary mirror-image in-
sertion. Familiar regulator features such as short circuit and
thermal overload protection are also provided.
Features
n
Dropout voltage typically 0.5V
@
I
O
= 1A
n
Output current in excess of 1A
n
Output voltage trimmed before assembly
n
Reverse battery protection
n
Internal short circuit current limit
n
Mirror image insertion protection
n
P
+
Product Enhancement tested
Typical Application
Ordering Information
Temperature
Range
Output Voltage
9.0
LM2940CT-9.0
LM2940CS-9.0
LM2940T-9.0
LM2940S-9.0
LM2940IMP-9.0
Package
5.0
8.0
10
12
15
0C
≤
T
J
≤
125C
LM2940CT-5.0
LM2940CS-5.0
LM2940T-5.0
LM2940S-5.0
LM2940IMP-5.0
LM2940IMPX-5.0 LM2940IMPX-8.0 LM2940IMPX-9.0 LM2940IMPX-10 LM2940IMPX-12 LM2940IMPX-15 SOT-223
LM2940CT-12
LM2940CS-12
LM2940T-12
LM2940S-12
LM2940IMP-12
LM2940CT-15
LM2940CS-15
TO-220
TO-263
TO-220
TO-263
SOT-223
40C
≤
T
J
≤
125C
LM2940T-8.0
LM2940S-8.0
LM2940IMP-8.0
LM2940T-10
LM2940S-10
LM2940IMP-10
40C
≤
T
J
≤
85C
LM2940IMP-15
in Tape
and Reel
SOT-223 Package
Marking
L53B
L54B
L0EB
L55B
L56B
L70B
The physical size of the SOT-223 is too small to contain the full device part number. The package markings indicated are what will appear on the actual device.
Temperature
Range
Output Voltage
Package
5.0
8.0
12
15
55C
≤
T
J
≤
125C
LM2940J-5.0/883
5962-8958701EA
LM2940WG5.0/883
5962-8958701XA
LM2940J-8.0/883
5962-9088301QEA
LM2940J-12/883
5962-9088401QEA
LM2940J-15/883
5962-9088501QEA
J16A
WG16A
For information on military temperature range products, please go to the Mil/Aero Web Site at http://www.national.com/appinfo/milaero/index.html.
DS008822-3
*
Required if regulator is located far from power supply filter.
**
C
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.
March 2000
L
2000 National Semiconductor Corporation
DS008822
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2940CT-9.0 | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LM2940CT-9.0/NOPB | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LM2940CT-9.0/NOPB | 制造商:Texas Instruments 功能描述:Voltage Regulator IC |
| LM2940GW5.0/883 | 制造商:Texas Instruments 功能描述: |
| LM2940IMP-10 | 功能描述:低壓差穩壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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