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參數(shù)資料
| 型號： | LM2940WG |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 410K |
| 代理商： | LM2940WG |
Output Voltage (V
O
)
Parameter
12V
15V
Units
LM2940
Limit
(Note 5)
LM2940/833
Limit
(Note 6)
LM2940
Limit
(Note 5)
LM2940/833
Limit
(Note 6)
Conditions
Typ
Typ
Ripple Rejection
f
O
= 120 Hz, 1 V
rms
,
I
O
= 100 mA
LM2940
LM2940C
f
O
= 1 kHz, 1 V
rms
,
I
O
= 5 mA
66
66
54/
48
54
dB
MIN
64
52
52/
46
48/
42
dB
MIN
Long Term
Stability
Dropout Voltage
48
60
mV/
I
O
= 1A
I
O
= 100 mA
(Note 7)
R
O
= 100Ω
LM2940, T
≤
100 ms
LM2940/883, T
≤
20 ms
LM2940C, T
≤
1 ms
R
O
= 100Ω
LM2940, LM2940/883
LM2940C
R
O
= 100Ω
LM2940, T
≤
100 ms
LM2940/883, T
≤
20 ms
LM2940C, T
≤
1 ms
1000 Hr
V
MAX
mV
MAX
0.5
0.8/
1.0
150/
200
0.7/
1.0
150/
200
0.5
0.8/
1.0
150/
200
0.7/
1.0
150/
200
110
110
Short Circuit
Current
Maximum Line
1.9
1.6
1.6/
1.3
1.9
1.6
1.6/
1.3
A
MIN
Transient
75
60/
60
40/
40
40/
40
V
MIN
55
45
55
45
Reverse Polarity
DC Input
Voltage
Reverse Polarity
30
30
15/
15
15
15/
15
15/
15
V
MIN
30
15
Transient Input
75
50/
50
Voltage
45/
45
45/
45
V
MIN
55
45/
45
55
45/
45
Thermal Performance
Thermal Resistance
Junction-to-Case,
θ
(
JC)
3-Lead TO-220
3-Lead TO-263
3-Lead TO-220 (Note 2)
3-Lead TO-263 (Note 2)
SOT-223(Note 2)
8-Lead LLP (Note 2)
4
4
°C/W
Thermal Resistance
Junction-to-Ambient,
θ
(
JA)
60
80
174
35
°C/W
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
, the junction-to-ambient thermal resistance,
θ
, and
the ambient temperature, T
. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal
shutdown. The value of
θ
(for devices in still air with no heatsink) is 60°C/W for the TO-220 package, 80°C/W for the TO-263 package, and 174°C/W for the
SOT-223 package. The effective value of
θ
can be reduced by using a heatsink (see Application Hints for specific information on heatsinking). The value of
θ
for the LLP package is specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance
and power dissipation for the LLP package, refer to Application Note AN-1187. It is recommended that 6 vias be placed under the center pad to improve thermal
performance.
Note 3:
Refer to JEDEC J-STD-020C for surface mount device (SMD) package reflow profiles and conditions. Unless otherwise stated, the temperature and time
are for Sn-Pb (STD) only.
Note 4:
ESD rating is based on the human body model, 100 pF discharged through 1.5 k
Ω.
Note 5:
All limits are guaranteed at T
= T
= 25°C only (standard typeface) or over the entire operating temperature range of the indicated device (boldface type).
All limits at T
A
= T
J
= 25°C are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control
methods.
Note 6:
All limits are guaranteed at T
= T
= 25°C 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 7:
Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
www.national.com
6
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| LM2940WG-12/883 | 制造商:National Semiconductor Corporation 功能描述:LDO Regulator Pos 12V 1A 16-Pin CPAK 制造商:National Semiconductor 功能描述:LDO Regulator Pos 12V 1A 16-Pin CPAK |
| LM2940WG-15/883 | 制造商:National Semiconductor Corporation 功能描述:LDO Regulator Pos 15V 1A 16-Pin CPAK 制造商:National Semiconductor 功能描述:LDO Regulator Pos 15V 1A 16-Pin CPAK |
| LM2940WG5.0/883 | 制造商:National Semiconductor Corporation 功能描述:LDO Regulator Pos 5V 1A 16-Pin CPAK Tray 制造商:Texas Instruments 功能描述:LDO Regulator Pos 5V 1A 16-Pin CPAK Tray 制造商:National Semiconductor 功能描述:LDO Regulator Pos 5V 1A 16-Pin CPAK Tray |
| LM2941 MDE | 制造商:Texas Instruments 功能描述:- Gel-pak, waffle pack, wafer, diced wafer on film |
| LM2941CS | 功能描述:低壓差穩(wěn)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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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