TLV431A 1% accuracy, low-voltage, adjustable precision shunt regulator | TI.com

TLV431A
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1% accuracy, low-voltage, adjustable precision shunt regulator

1% accuracy, low-voltage, adjustable precision shunt regulator - TLV431A
Datasheet
TLV431x Low-Voltage Adjustable Precision Shunt Regulator datasheet (Rev. X)
 

Recommended alternative parts

  • TLVH431A  - The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.   It offers a wider range for Vout (18V max) and Iz (80mA max).
  • TLVH432A  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   It offers a wider range for Vout (18V max) and Iz (80mA max), as well as different pinouts for SOT23-3 & SOT-89 packages.

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.

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Parametrics

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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
0 to 70
-40 to 85    		 60     80     SC70 | 6