TL431 The TL431 is a three-terminal adjustable shunt regulator offering precise voltage and current referencing. It operates from -40°C to 125°C with an adjustable output voltage range.
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TL431

Available from 1 distributors
Mfr Name: UMW (Youtai Semiconductor)
UMW (Youtai Semiconductor)
The TL431 is a three-terminal adjustable shunt regulator offering precise voltage and current referencing. It operates from -40°C to 125°C with an adjustable output voltage range.
✓ Total Stock: 721 pcs
$ Price Range: $0.30

TL431 Available from 1 distributor

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
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721 pcs On Request 1 On Request On Request On Request On Request On Request

TL431 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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TL431 Description

Short technical summary and product information.

The TL431 is a precision programmable shunt voltage reference designed for adjustable voltage and current referencing applications. It allows the output voltage to be set anywhere between Vref (approximately 2.5V) and 36V using two external resistors. This device features specified thermal stability over automotive, commercial, and military temperature ranges, operating from -40°C to 125°C.

 

With a typical output impedance of 0.2Ω and active output circuitry, the TL431 provides a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in applications such as onboard regulation, adjustable power supplies, and switching power supplies. It offers sink-current capability from 1mA to 100mA and various grades with initial voltage tolerances at 25°C of 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade).

 

The TL431 is available in multiple package types including SOT-23, SOIC, PDIP, and SOP, suitable for surface mount and through-hole applications.

TL431 Quick Information

Product Type: Shunt Voltage Reference
Series: TL431
Canonical Name: TL431 Precision Programmable Reference
Subcategory: Linear Regulator Controllers

TL431 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

TL431 Estimated Pricing

Qty Low High
1+ $0.30 $0.30

Estimated market price range - modelled values for guidance only, not live distributor offers.

TL431 Features

  • Adjustable output voltage from 2.5V to 36V.
  • Initial voltage tolerance up to 0.5%.
  • Wide operating temperature range of -40°C to 125°C.
  • Low typical output impedance of 0.2Ω.
  • Sink current capability from 1mA to 100mA.

TL431 Applications

  • Adjustable voltage and current referencing.
  • Secondary side regulation in SMPS.
  • Zener diode replacement.
  • Voltage monitoring circuits.
  • Comparator with integrated reference.

TL431 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the adjustable output voltage range for the TL431?

The output voltage can be set to any value between approximately 2.5V and 36V.

What is the reference voltage tolerance at 25°C for the TL431?

The reference voltage tolerance at 25°C is 0.5% for the B Grade, 1% for the A Grade, and 2% for the Standard Grade.

What is the operating temperature range of the TL431?

The TL431 operates from -40°C to 125°C.

What is the typical output impedance of the TL431?

The typical output impedance is 0.2Ω.

What is the sink-current capability of the TL431?

The sink-current capability ranges from 1mA to 100mA.

What packages is the TL431 available in?

The TL431 is available in SOT-23-3, SOT-23-5, SOIC-8, PDIP-8, and SOP-8 packages.

TL431 Alternate Parts

Same form/fit/function or matching attribute configuration across different manufacturers.
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TL431ACDBZRG4
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TL431ACP
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