LM431 Ver la hoja de datos (PDF) - TAITRON Components Incorporated
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LM431 Datasheet PDF : 14 Pages
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Shunt Regulator
LM431
Electrical Characteristics (TA=25ºC, unless otherwise specified)
Symbol
VREF
Description
Reference Input
Voltage
LM431
Min. Typ. Max.
LM431A
Min. Typ. Max.
LM431B
Min. Typ. Max.
Unit
Test
Circuit
Conditions
2.440 2.495 2.550 2.480 2.500 2.520 2.490 2.500 2.510 V
Fig.1
VKA=VREF,IKA=10mA
Reference 0-70° C
-
-
-
-
4.8
8
-
4.5
8
∆VREF
Input
Voltage
Deviation
-40-85
-
7.0
30
-
4.5
10
-
mV
Fig.1
(Note1)
VKA=VREF,IKA=10mA
4.5
10
°C
∆VREF/∆VKA
Ratio of Change in
Reference Input
Voltage to Change in
Cathode to Anode
Voltage
-
-
-1.4 -2.7
-1.0 -2.0
-
-
-1.0 -2.7
-0.5 -2.0
-
-
-1.0 -2.7
mV/V
-0.5 -2.0
Fig.2
IKA=
10mA
∆VKA=10V~
VREF
∆VKA=36V~
10V
IREF
Ta=25°
Referenc C
-
e Input
Current
Ta=Topr
-
1.8 4.0
-
6.5
-
-
0.7 4.0
-
-
-
-
0.7 4.0
µA
-
-
Fig.2
IKA=10mA, R1=10KΩ,
R2=∞
∆IREF
Reference Input
Current Deviation
IKA=10mA, R1=10KΩ,
-
0.8 2.5
-
0.4 1.2
-
0.4
1.2
µA
Fig.2
R2=∞,
-40 ~ 85° C
IMIN
IOFF
ZKA
Min. Cathode Current
For Regulation
-
0.5 1.0
-
0.4 1.0
-
0.4 1.0 mA
Fig.1
VKA=VREF
Off-State Cathode
Current
Dynamic Impedance
-
2.6 1000
-
50 1000
-
-
0.22
-
-
0.15 0.5
-
50 1000 nA
0.15 0.5
Ω
Fig.3
Fig.1
(Note2)
VKA=36V, VREF=0V
VKA=VREF,
IKA=1.0~100mA,
f≤1.0KHz
Fig.1- Test Circuit for VKA=VREF
Fig.2- Test Circuit for VKA>VREF
www.taitroncomponents.com
Rev. A/DX 2007-06-04
Page 4 of 14
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