Adjustable Precision Zener Shunt Regulator - LM431

LM431 (ACTIVE)

Adjustable Precision Zener Shunt Regulator

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 2.5V (VREF) up to 36V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications.

Features

  • Average Temperature Coefficient 50 ppm/°C
  • Temperature Compensated for Operation Over the Full Temperature Range
  • Programmable Output Voltage
  • Fast Turn-On Response
  • Low Output Noise

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Parametrics Compare all products in Shunt Voltage Reference

 
Reference Voltage
VO Adj (Min) (V)
VO Adj (Max) (V)
Initial Accuracy (Max) (%)
Min Iz for Regulation (uA)
Vref (V)
Iout/Iz (Max) (mA)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LM431 LMV431
Adjustable     Adjustable    
2.5     1.24    
36     30    
0.5     1.5    
400     55    
  1    
0.1     30    
Catalog     Catalog    
-40 to 85     -40 to 85
0 to 70    
3SOT-23
3TO-92
8SOIC    
3TO-92
5SOT-23    
0.18 | 1ku     0.16 | 1ku    
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