TLV431A 1% Accuracy Low-Voltage Adjustable Precision Shunt Regulator | TI.com

TLV431A
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
1% Accuracy Low-Voltage Adjustable Precision Shunt Regulator

 

Recommended alternative parts

  • TLVH431A  -  It offers a wider range for Vout (18V max) and Iz (80mA max).
  • TLVH432A  -  It offers a wider range for Vout (18V max) and Iz (80mA max), as well as different pinouts for SOT23-3 & SOT-89 packages.

Different accuracy grades available

This device is available in 3 accuracy grades :

Description

The TLV431 device is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24 V) and 6 V with two external resistors (see the Parameter Measurement Information section). These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLV431 device is an ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turnon characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

Features

  • Low-Voltage Operation, VREF = 1.24 V
  • Adjustable Output Voltage, VO = VREF to 6 V
  • Reference Voltage Tolerances at 25°C
    • 0.5% for TLV431B
    • 1% for TLV431A
    • 1.5% for TLV431
  • Typical Temperature Drift
    • 4 mV (0°C to 70°C)
    • 6 mV (–40°C to 85°C)
    • 11 mV (–40°C to 125°C)
  • Low Operational Cathode Current, 80 µA Typical
  • 0.25-Ω Typical Output Impedance
  • Ultra-Small SC-70 Package Offers 40% Smaller Footprint Than SOT-23-3
  • See TLVH431 and TLVH432 for:
    • Wider VKA (1.24 V to 18 V) and IK (80 mA)
    • Additional SOT-89 Package
    • Multiple Pinouts for SOT-23-3 and SOT-89 Packages
  • On Products Compliant to MIL-PRF-38535,
    All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

All trademarks are the property of their respective owners.

Parametrics

Compare all products in Shunt voltage references Email Download to Excel
Part number Order 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)
TLV431A Order now Adjustable     1.24     1.24     6     1     138     Catalog     -40 to 125
-40 to 85
0 to 70    
55     15     SOIC | 8
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431 Order now Adjustable     1.24     1.24     6     1.5     138     Catalog     -40 to 125
-40 to 85
0 to 70    
55     15     SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431A-Q1 Samples not available Adjustable     1.24     1.24     6     1     161     Automotive     -40 to 125     55     15     SOT-23 | 5     0.5     0.5    
TLV431B Order now Adjustable     1.24     1.24     6     0.5     138     Catalog     -40 to 125
-40 to 85
0 to 70    
55     15     SC70 | 6
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLV431B-Q1 Order now Adjustable     1.24     1.24     6     0.5     161     Automotive     -40 to 125     55     15     SOT-23 | 3
SOT-23 | 5    
0.5     0.5    
TLVH431 Order now Adjustable     1.24     1.24     18     1.5     138     Catalog     -40 to 125
-40 to 85
0 to 70    
60     80     SC70 | 6
SOT-23 | 3
SOT-23 | 5
SOT-89 | 3
TO-92 | 3    
0.5     0.5    
TLVH431A Order now Adjustable     1.24     1.24     18     1     138     Catalog     -40 to 125
-40 to 85
0 to 70    
60     80     SC70 | 6