TL431 Adjustable Shunt Regulator

Three-terminal, adjustable precision shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges from TI

Image of Texas Instruments TL431 Adjustable Shunt Regulator Texas Instruments' TL431 devices are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between VREF, approximately 2.5 V and 36 V, with two external resistors. These devices have a typical output impedance of 0.2 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies.

Features
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
    • 2% (standard grade)
  • Adjustable output voltage: VREF to 36 V
  • Operation from -40°C to +125°C
  • Typical temperature drift (TL431B)
    • 6 mV (C temp)
    • 14 mV (I temp, Q temp)
  • Low output noise
  • 0.2 Ω typical output impedance
  • Sink-current capability: 1 mA to 100 mA

TL431 Adjustable Shunt Regulator

ImageManufacturer Part NumberDescriptionToleranceAvailable Quantity
IC VREF SHUNT ADJ 8DIPTL431ACPIC VREF SHUNT ADJ 8DIP±1%3518 - Immediate
10000 - Factory Stock
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IC VREF SHUNT ADJ TO92-3TL431AILPRIC VREF SHUNT ADJ TO92-3±1%6575 - ImmediateView Details
IC VREF SHUNT ADJ TO92-3TL431AILPIC VREF SHUNT ADJ TO92-3±1%5253 - Immediate
10000 - Factory Stock
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IC VREF SHUNT ADJ 8DIPTL431AIPIC VREF SHUNT ADJ 8DIP±1%2520 - Immediate
10000 - Factory Stock
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IC VREF SHUNT ADJ SOT23-5TL431CDBVRIC VREF SHUNT ADJ SOT23-5±2.2%24360 - ImmediateView Details
IC VREF SHUNT ADJ SOT23-5TL431CDBVRIC VREF SHUNT ADJ SOT23-5±2.2%24000 - ImmediateView Details
IC VREF SHUNT ADJ SOT23-5TL431CDBVRIC VREF SHUNT ADJ SOT23-5±2.2%24360 - ImmediateView Details
IC VREF SHUNT ADJ SOT23-5TL431IDBVRIC VREF SHUNT ADJ SOT23-5±2.2%19044 - ImmediateView Details
IC VREF SHUNT ADJ SOT23-5TL431IDBVRIC VREF SHUNT ADJ SOT23-5±2.2%18000 - ImmediateView Details
IC VREF SHUNT ADJ SOT23-5TL431IDBVRIC VREF SHUNT ADJ SOT23-5±2.2%19044 - ImmediateView Details
Published: 2015-03-28