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參數(shù)資料
| 型號： | LM340T157815 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 3-Terminal Positive Regulators |
| 中文描述： | 三端穩(wěn)壓器正 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大小： | 925K |
| 代理商： | LM340T157815 |
LM340 Electrical Characteristics
(Note 4) (Continued)
0C
≤
T
J
≤
+125C unless otherwise specified
Output Voltage
Symbol
Input Voltage (unless otherwise noted)
Parameter
V
MIN
≤
V
IN
≤
V
MAX
5V
10V
Typ Max Min
(7.5
≤
V
IN
≤
20)
12V
19V
Typ Max Min
(14.8
≤
V
IN
≤
27)
15V
23V
Typ
Units
Conditions
Min
Max
(17.9
≤
V
IN
≤
30)
V
I
O
≤
500 mA, 0C
≤
T
J
≤
+125C
V
MIN
≤
V
IN
≤
V
MAX
1.0
1.0
1.0
mA
V
(7
≤
V
IN
≤
25)
(14.5
≤
V
IN
≤
30)
75
(17.5
≤
V
IN
≤
30)
V
N
Output Noise
Voltage
Ripple Rejection
T
A
= 25C, 10 Hz
≤
f
≤
100 kHz
40
90
μV
I
O
≤
1A, T
J
=
25C
or I
O
≤
500 mA,
0C
≤
T
J
≤
+125C
62
80
55
72
54
70
dB
f = 120 Hz
62
55
54
dB
V
MIN
≤
V
IN
≤
V
MAX
(8
≤
V
IN
≤
18)
(15
≤
V
IN
≤
25)
(18.5
≤
V
IN
≤
28.5)
2.0
19
1.2
2.4
V
R
O
Dropout Voltage
Output Resistance
Short-Circuit Current T
J
= 25C
Peak Output
Current
Average TC of V
OUT
0C
≤
T
J
≤
+125C, I
O
= 5 mA
Input Voltage
T
J
= 25C, I
O
≤
1A
Required to
Maintain
Line Regulation
T
J
= 25C, I
O
= 1A
f = 1 kHz
2.0
8
2.1
2.4
2.0
18
1.5
2.4
V
m
A
A
T
J
= 25C
0.6
1.5
1.8
mV/C
V
IN
7.5
14.6
17.7
V
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 at any ambient temperature is a function of the maximum junction temperature for operation (T
= 125C or
150C), the junction-to-ambient thermal resistance (
θ
), and the ambient temperature (T
). P
= (T
T
)/
θ
. If this dissipation is exceeded, the die
temperature will rise above T
JMAX
and the electrical specifications do not apply. If the die temperature rises above 150C, the device will go into thermal shutdown.
For the TO-3 package (K, KC), the junction-to-ambient thermal resistance (
θ
JA
) is 39C/W. When using a heatsink,
θ
JA
is the sum of the 4C/W junction-to-case
thermal resistance (
θ
JC
) of the TO-3 package and the case-to-ambient thermal resistance of the heatsink. For the TO-220 package (T),
θ
JA
is 54C/W and
θ
JC
is
4C/W. If SOT-223 is used, the junction-to-ambient thermal resistance is 174C/W and can be reduced by a heatsink (see Applications Hints on heatsinking).
If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package: Using 0.5 square
inches of copper area,
θ
JA
is 50C/W; with 1 square inch of copper area,
θ
JA
is 37C/W; and with 1.6 or more inches of copper area,
θ
JA
is 32C/W.
Note 3:
ESD rating is based on the human body model, 100 pF discharged through 1.5 k
.
Note 4:
All characteristics are measured with a 0.22 μF capacitor from input to ground and a 0.1 μF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (t
w
≤
10 ms, duty cycle
≤
5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
Note 5:
Military datasheets are available upon request. At the time of printing, the military datasheet specifications for the LM140K-5.0/883, LM140K-12/883, and
LM140K-15/883 complied with the min and max limits for the respective versions of the LM140. The LM140H and LM140K may also be procured as JAN devices
on slash sheet JM38510/107.
L
www.national.com
6
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