LM431 (ACTIVE)

2%, 1%, or 0.5% Accuracy Adjustable Precision Zener Shunt Regulator

2%, 1%, or 0.5% Accuracy Adjustable Precision Zener Shunt Regulator - LM431
 

Recommended alternative parts

  • LM4120  -  Lower Supply Current, Lower Temperature Coefficient & Enable Pin
  • LM4125  -  Lower Supply Current, Lower Temperature Coefficient
  • LM4128  -  Lower Supply Current, Lower Temperature Coefficient & Enable Pin
  • LM4128-Q1  -  Lower Supply Current, Lower Temperature Coefficient & Enable Pin
  • LM4132  -  Lower Supply Current, Lower Temperature Coefficient & Enable Pin
  • LM4051-N  -  Better Temperature Coefficient and Initial Accuracy

Description

The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications.

The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92 packages.

Features

  • Average Temperature Coefficient 50 ppm/°C
  • Temperature Compensated for Operation Over
    the Full Temperature Range
  • Programmable Output Voltage
  • Fast Turnon Response
  • Low-Output Noise
  • Low-Dynamic Output Impedance
  • Available in Space-Saving SOIC-8, SOT-23, and
    TO-92 Packages

View more

Parametrics Compare all products in Shunt Voltage Reference

 
Reference Voltage
VO (V)
VO Adj (Min) (V)
VO Adj (Max) (V)
Initial Accuracy (Max) (%)
Temp Coeff (Max) (ppm/ degree C)
Rating
Operating Temperature Range (C)
Iz for Regulation (Min) (uA)
Iout/Iz (Max) (mA)
Package Group
LM431 ATL431 LMV431 TL431 TL431A TL431B
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
2.5    2.5    1.24    2.495    2.495    2.495   
2.5    2.5    1.24    2.495    2.495    2.495   
36    36    30    36    36    36   
0.5
1
2   
0.5
1   
1.5    2    1    0.5   
97    92    129
138   
92    92    92   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85
0 to 70   
-40 to 125
-40 to 85   
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
-40 to 125
-40 to 85
0 to 70   
400    20    80    400    400    400   
100    100    15    100    100    100   
SOIC
SOT-23
TO-92   
SOT-23    SOT-23
TO-92   
PDIP
SC70
SO
SOIC
SOT-23
SOT-23
SOT-89
TO-92
TSSOP   
PDIP
SC70
SO
SOIC
SOT-23
SOT-23
SOT-89
TO-92
TSSOP   
PDIP
SC70
SO
SOIC
SOT-23
SOT-23
SOT-89
TO-92
TSSOP   
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WEBENCH® Designer LM431

  Min   Max Range
Vin  V 2.5 to 37.0V
Vout  V 2.5 to 36V
Iout  A ≤ 0.1A
Ambient Temp  °C -40 to 85°C


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