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參數(shù)資料
| 型號(hào)： | LM3940T |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 1.25A High Current Low Dropout |
| 中文描述： | 1.25A的高電流低壓差 |
| 文件頁(yè)數(shù)： | 2/3頁(yè) |
| 文件大?。?/td> | 145K |
| 代理商： | LM3940T |
Bay Linear, Inc
2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com
LM3940
ABSOLUTE MAXIMUM RATINGS
Lead Temp. (Soldering, 5 Seconds).................................260°C
Storage Temperature Range.............................. -65° to +150°C
Operating Junction Temperature Range
LM3940 Control Section........................... -45°C +125°C
LM3940 Power Transistor..........................-45°C +150°C
ELECTRICAL CHARACTERISTICS
I
OUT
= 5mA, V
IN
=V
OUT
+ 1V, I
l
= 1250mA, C
L
= 10
μ
F. Ta=25
°
C, unless otherwise specified.
PARAMETER
CONDITIONS
Input Voltage........................................................26V
Maximum Output Current....................................3.5A
Input Supply Voltage (Survival)..........-20V to +60V
Typ
LM3940
Min Max
3.267
3.234
4.95
4.90
Units
Output Voltage
5mA
≤
I
L
≤
1.25A
5mA
≤
I
L
≤
1.25A
I
O
= 5mA, 4.5V
≤
V
IN
≤
5.5V
50mA
≤
I
OUT
≤
1.25 A
I
O
= 5mA
I
O
= 1000mA
I
O
= 1250mA
I
O
= 5mA, V
IN
= V
OUT
, +1V
I
O
= 1000mA, V
IN
= V
OUT
, +1V
I
O
= 1.25A
R
L
= 0
3.3
3.3
5.0
5.0
20
35
3.330
3.366
5.05
5.10
40
50
V
Output Voltage
V
Line Regulation
Load Regulation
mV
mV
120
180
400
600
Dropout Voltage
500
800
mV
Quiescent Current
240
22
35
350
35
70
μ
A
mA
Short Circuit Current
1.7
1.2
A
Current Limit
Output Noise Voltage
(10Hz to 100kHz)
I
L
= 100mA
BLOCK DIAGRAM
V
OUT
= 0V (Note 4)
C
L
= 10
μ
F
C
L
= 33
μ
F
1.7
1.5
A
400
260
μ
V
RMS
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