1.224V open collector shunt voltage reference

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  • The TS4431 is a four-terminal device dedicated to low voltage Switch Mode Power Supplies (SMPS).

    It integrates a 1.224V voltage reference, an amplifier, and an open collector output transistor in a single package. The TS4431’s operating mode is similar to the well-known standard voltage reference, the TL431. It maintains the desired feedback voltage at the REF pin in a closed loop configuration by sinking a current proportional to the error voltage at the REF pin.
    TS4431 features an open collector transistor with an ultra-low saturation voltage, allowing it to be used in series with the optocoupler in an SMPS architecture to regulate low voltage SMPS.

    Key Features

    • Internal 1.224V ±0.5% precision
    • Low current consumption: 250 µA
    • Low output saturation voltage 75 mV max between SINK and GND
    • 100ppm/˚C temperature coefficient
    • Industrial temperature range: -40 to +85˚C

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Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
TS4431AILT SOT23-5L Tape And Reel
Active
0.32 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofTS4431AILT

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2890 1 Order Now

Distributor reported inventory date: 2019-08-22

Distributor Name

MOUSER

Stock

2890

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-08-22

Buy now
TS4431ILT SOT23-5L Tape And Reel
Active
0.305 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofTS4431ILT

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 4774 1 Order Now

Distributor reported inventory date: 2019-08-22

Distributor Name

MOUSER

Stock

4774

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-08-22

Buy now

TS4431AILT

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.32*

Distributor availability ofTS4431AILT

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2890 1 Order Now

Distributor reported inventory date: 2019-08-22

Distributor Name

MOUSER

Stock

2890

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-08-22

Marketing Status

Active

Unit Price (US$)

0.32

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

TS4431ILT

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.305*

Distributor availability ofTS4431ILT

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 4774 1 Order Now

Distributor reported inventory date: 2019-08-22

Distributor Name

MOUSER

Stock

4774

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-08-22

Marketing Status

Active

Unit Price (US$)

0.305

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Technical Documentation

    • Description Version Size Action
      DS4205
      1.224V open collector shunt voltage reference
      2.3
      156.76 KB
      PDF
      DS4205

      1.224V open collector shunt voltage reference

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

    • Description Version Size Action
      Automotive Standard Analog Robustness and Performance 1.0
      3.02 MB
      PDF
      Power Management Guide 06.2019
      5.5 MB
      PDF

      Automotive Standard Analog Robustness and Performance

      Power Management Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
TS4431AILT
Active
SOT23-5L Industrial Ecopack2
TS4431ILT
Active
SOT23-5L Industrial Ecopack2

TS4431AILT

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

TS4431ILT

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.