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參數(shù)資料
| 型號(hào)： | LM431 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Adjustable precision shunt regulators |
| 中文描述： | 可調(diào)節(jié)精密并聯(lián)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大小： | 380K |
| 代理商： | LM431 |
Absolute Maximum Ratings
(Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Operating Temperature Range
Industrial (LM431xI)
Commercial (LM431xC)
Soldering Information
Infrared or Convection (20 sec.)
Wave Soldering (10 sec.)
Cathode Voltage
Continuous Cathode Current
65C to +150C
40C to +85C
0C to +70C
235C
260C (lead temp.)
37V
10 mA to +150 mA
Reference Voltage
Reference Input Current
Internal Power Dissipation (Notes 3, 4)
TO-92 Package
SO-8 Package
SOT-23 Package
micro SMD Package
0.5V
10 mA
0.78W
0.81W
0.28W
0.30W
Operating Conditions
Min
V
REF
1.0 mA
Max
37V
100 mA
Cathode Voltage
Cathode Current
LM431
Electrical Characteristics
T
A
= 25C unless otherwise specified
Symbol
V
REF
Reference Voltage
Parameter
Conditions
Min
2.440
Typ
2.495
Max
2.550
Units
V
V
Z
= V
REF
, I
I
= 10 mA
LM431A (Figure 1 )
V
Z
= V
REF
, I
I
= 10 mA
LM431B (Figure 1 )
V
Z
= V
REF
, I
I
= 10 mA
LM431C (Figure 1 )
V
Z
= V
REF
, I
I
= 10 mA,
T
A
= Full Range (Figure 1 )
I
Z
= 10 mA
2.470
2.495
2.520
V
2.485
2.500
2.510
V
V
DEV
Deviation of Reference Input Voltage Over
Temperature (Note 5)
Ratio of the Change in Reference Voltage
8.0
17
mV
V
Z
from V
REF
to 10V
1.4
2.7
mV/V
to the Change in Cathode Voltage
(Figure 2 )
V
Z
from 10V to 36V
1.0
2.0
I
REF
Reference Input Current
R
1
= 10 k
, R
2
=
∞
,
I
I
= 10 mA (Figure 2 )
R
1
= 10 k
, R
2
=
∞
,
I
I
= 10 mA,
T
A
= Full Range (Figure 2 )
V
Z
= V
REF
(Figure 1 )
V
Z
= 36V, V
REF
= 0V (Figure 3 )
V
Z
= V
REF
, LM431A,
Frequency = 0 Hz (Figure 1 )
V
Z
= V
REF
, LM431B, LM431C
Frequency = 0 Hz (Figure 1 )
2.0
4.0
μA
∝
I
REF
Deviation of Reference Input Current over
Temperature
0.4
1.2
μA
I
Z(MIN)
I
Z(OFF)
r
Z
Minimum Cathode Current for Regulation
Off-State Current
Dynamic Output Impedance (Note 6)
0.4
0.3
1.0
1.0
0.75
mA
μA
0.50
Note 2:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 3:
T
J Max
= 150C.
Note 4:
Ratings apply to ambient temperature at 25C. Above this temperature, derate the TO-92 at 6.2 mW/C, the SO-8 at 6.5 mW/C, the SOT-23 at 2.2 mW/C
and the micro SMD at 3mW/C.
Note 5:
Deviation of reference input voltage, V
DEV
, is defined as the maximum variation of the reference input voltage over the full temperature range.
L
www.national.com
4
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