TL431AIDBVRG4 Equivalent & Substitute Parts

Part Overview

The TL431AIDBVRG4 is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments. This component is classified as a Power Management (PMIC) device and provides a stable 2.495V to 36V adjustable reference with ±1% tolerance and 100 mA output capability in a SOT-23-5 surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

TL431AIDBVRG4

Texas InstrumentsIn Stock: 4268TL431AIDBVRG4 Datasheet

Current PartRFQ

TL431AIDBVR

Texas InstrumentsIn Stock: 41383TL431AIDBVR Datasheet

MFR RecommendedRFQ

TL431AW5-7

Diodes IncorporatedIn Stock: 27273TL431AW5-7 Datasheet

DirectRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TL431AIDBVRG4 is determined by strict alignment of the following electrical and mechanical parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V or 2.5V
• Voltage - Output (Max): 36V
• Current - Output: 100 mA
• Tolerance: ±1%
• Current - Cathode: 700 µA or 1 mA
• Mounting Type: Surface Mount
• Package / Case: SC-74A, SOT-753
• Supplier Device Package: SOT-23-5 or SOT-25

Substitute parts are grouped into two categories based on manufacturer recommendation status and product availability:

MFR Recommended Substitutes: Parts explicitly recommended by the original manufacturer for direct replacement, maintaining identical electrical specifications and package compatibility.

Direct Manufacturer Substitutes: Parts from alternative manufacturers that meet all critical electrical parameters and package requirements, with active product status and current availability.

Parameter Comparison

Engineering Selection Recommendations

TL431AIDBVR (MFR Recommended): This Texas Instruments part is the primary substitute for the obsolete TL431AIDBVRG4. It maintains identical electrical specifications, package configuration, and operating temperature range. Product status is active with 41,300 units in stock. This part is ROHS3 compliant with MSL 1 rating, matching the original part's environmental specifications.

TL431AW5-7 (Direct Substitute): Manufactured by Diodes Incorporated, this part meets all critical electrical parameters with identical voltage output range, current rating, and tolerance. The operating temperature range extends to 125°C, providing enhanced thermal performance. Package designation is SOT-25 rather than SOT-23-5, requiring PCB layout verification for pin compatibility. Product status is active with 27,200 units available.

AS431BKTR-G1 (Direct Substitute): Also from Diodes Incorporated, this part provides equivalent electrical functionality with a minimum output voltage of 2.5V (versus 2.495V) and cathode current of 1 mA (versus 700 µA). Operating temperature extends to 125°C. MSL rating is 3 (168 Hours), requiring controlled storage conditions. Product status is active with 4,122 units in stock.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for the original application.

Frequently Asked Questions (FAQ)

Q: Can TL431AIDBVR be used as a direct replacement for TL431AIDBVRG4?

A: Yes. TL431AIDBVR is the manufacturer-recommended substitute with identical electrical specifications, package type (SOT-23-5), and operating temperature range (-40°C to 85°C). Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between TL431AW5-7 and the original TL431AIDBVRG4?

A: TL431AW5-7 meets all critical electrical parameters but uses SOT-25 package designation instead of SOT-23-5. The operating temperature range is extended to 125°C. PCB layout verification is required to confirm pin compatibility before substitution.

Q: Is AS431BKTR-G1 compatible with TL431AIDBVRG4?

A: AS431BKTR-G1 provides equivalent shunt reference functionality with the same voltage output range and current rating. The minimum output voltage is 2.5V (versus 2.495V), and cathode current is 1 mA (versus 700 µA). Operating temperature extends to 125°C. MSL rating is 3, requiring controlled storage. Circuit performance should be verified for the 5 mV output voltage difference.

Q: Why does AS431BKTR-G1 have a higher MSL rating?

A: MSL 3 (168 Hours) indicates stricter moisture control requirements during storage and handling compared to MSL 1 (Unlimited). This affects shelf life and storage conditions but does not impact electrical performance in the final application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for the original application.

Q: Which substitute offers the best thermal performance?

A: Both TL431AW5-7 and AS431BKTR-G1 extend the operating temperature range to 125°C, compared to 85°C for the original part. Selection depends on package compatibility (SOT-25 versus SOT-23-5) and cathode current requirements.