TL1431 Precision adjustable (programmable) shunt reference | TI.com

TL1431 (ACTIVE)

Precision adjustable (programmable) shunt reference

Precision adjustable (programmable) shunt reference - TL1431
Datasheet
TL1431 Precision Programmable Reference datasheet (Rev. N)
 

Recommended alternative parts

  • ATL431  -  30X lower Ik (35uA max), as well as improved stability.
  • TLV431  -  Vout (12V max) and Iz (80mA max), as well as different pinouts for SOT23-3 & SOT-89 packages, Vref=1.24, 2% trim accuracy.
  • TLVH431  -  Wider range for Vout (18V max) and Iz (80mA max), as well as different pinouts for SOT23-3 & SOT-89 packages.

Description

The TL1431 device is a precision programmable reference with specified thermal stability over automotive, commercial, and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately 2.5 V) and 36 V with two external resistors. This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a sharp turnon characteristic, making the device an excellent replacement for Zener diodes and other types of references in applications such as onboard regulation, adjustable power supplies, and switching power supplies.

The TL1431C is characterized for operation over the commercial temperature range of 0°C to 70°C. The TL1431Q is characterized for operation over the full automotive temperature range of –40°C to 125°C. The TL1431M is characterized for operation over the full military temperature range of –55°C to 125°C.

Features

  • 0.4% Initial Voltage Tolerance
  • 0.2-Ω Typical Output Impedance
  • Fast Turnon (500 ns)
  • Sink Current Capability (1 mA to 100 mA)
  • Low Reference Current (REF)
  • Adjustable Output Voltage (VI(ref) to 36 V)

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Parametrics Compare all products in Shunt voltage references

 
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
Iref (uA)
I I(dev) (uA)
TL1431 TL1431-EP TL1431-Q1 TL1431-SP
Adjustable     Adjustable     Adjustable     Adjustable    
2.5      
   		  
2.5     2.5     2.5     2.5    
36     36     36     36    
0.4     0.4     0.4     0.4    
114     114     114     114    
Catalog     HiRel Enhanced Product     Automotive     Space    
-40 to 125
0 to 70    		 -40 to 125
-55 to 125    		 -40 to 125     -55 to 125    
450     450     450     450    
150     100     100     100    
SOIC | 8
TO-92 | 3
TSSOP | 8    		 SOIC | 8     SOIC | 8     CDIP | 8
CFP | 10    
3       4      
1.2       2