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参数资料
| 型号： | LM2940CSX-12 |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| 中文描述： | 三端固定电压调节器 |
| 文件页数： | 6/17页 |
| 文件大小： | 409K |
| 代理商： | LM2940CSX-12 |
Electrical Characteristics
(Continued)
V
= V
+ 5V, I
= 1A, C
= 22 μF, unless otherwise specified.
Boldface limits apply over the entire operating tempera-
ture range of the indicated device.
All other specifications apply for T
A
= T
J
= 25C.
Output Voltage (V
O
)
12V
LM2940
Parameter
Conditions
Typ
Limit
(Note 4)
Long Term
48
Stability
Dropout Voltage
I
O
= 1A
0.5
0.8/
1.0
I
O
= 100 mA
110
150/
200
Short Circuit
(Note 6)
1.9
1.6
Current
Maximum Line
R
O
= 100
Transient
LM2940, T
≤
100 ms
75
60/
60
LM2940/883, T
≤
20 ms
LM2940C, T
≤
1 ms
55
45
Reverse Polarity
R
O
= 100
DC Input
LM2940, LM2940/883
30
15/
15
Voltage
LM2940C
30
15
Reverse Polarity
R
O
= 100
Transient Input
LM2940, T
≤
100 ms
75
50/
50
Voltage
LM2940/883, T
≤
20 ms
LM2940C, T
≤
1 ms
55
45/
45
15V
Units
LM2940/833
Limit
(Note 5)
LM2940
Limit
(Note 4)
LM2940/833
Limit
(Note 5)
Typ
60
mV/
1000 Hr
V
MAX
mV
MAX
0.7/
1.0
150/
200
0.5
110
0.8/
1.0
150/
200
0.7/
1.0
150/
200
1.6/
1.3
1.9
1.6
1.6/
1.3
A
MIN
40/
40
40/
40
V
MIN
55
45
15/
15
15/
15
V
MIN
30
15
45/
45
45/
45
V
MIN
55
45/
45
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions
but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
, the junction-to-ambient thermal resistance,
θ
JA
, and the
ambient temperature, T
A
. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.
The value of
θ
JA
(for devices in still air with no heatsink) is 60C/W for the TO-220 package, 80C/W for the TO-263 package, and 174C/W for the SOT-223 package.
The effective value of
θ
JA
can be reduced by using a heatsink (seeApplication Hints for specific information on heatsinking). The values of
θ
JA
and
θ
JC
for the K02A
package are 39C/W and 4C/W respectively.
Note 3:
ESD rating is based on the human body model, 100 pF discharged through 1.5 k
.
Note 4:
All limits are guaranteed at T
A
= T
J
= 25C only (standard typeface) or over the entire operating temperature range of the indicated device (boldface type).
All limits at T
A
= T
J
= 25C are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control
methods.
Note 5:
All limits are guaranteed at T
= T
= 25C only (standard typeface) or over the entire operating temperature range of the indicated device (boldface type).
All limits are 100% production tested and are used to calculate Outgoing Quality Levels.
Note 6:
Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
Typical Performance Characteristics
Dropout Voltage
DS008822-13
Dropout Voltage
vs Temperature
DS008822-14
Output Voltage
vs Temperature
DS008822-15
L
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2940CSX-12/NOPB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LM2940CSX-15 | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LM2940CSX-15/NOPB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LM2940CSX-5.0 | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LM2940CSX-5.0/NOPB | 功能描述:低压差稳压器 - LDO 1A LDO REG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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