LM431 2%, 1%, or 0.5% Accuracy Adjustable Precision Zener Shunt Regulator | TI.com

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

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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    
Coming Soon!
WEBENCH® Power Designer is now even easier to use. Learn more.

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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