TLV431BILPR Equivalent & Substitute Parts

Part Overview

The TLV431BILPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This device provides a fixed minimum output of 1.24V with adjustable maximum output up to 6V, delivering up to 15mA output current with ±0.5% tolerance. The part is packaged in TO-92-3 (through-hole) configuration and operates across the industrial temperature range of -40°C to 85°C.

The TLV431BILPR is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing production and maintenance applications.

Substiute Parts

TLV431BILPR

Texas InstrumentsIn Stock: 2169TLV431BILPR Datasheet

Current PartRFQ

TLV431BIDBZR

Texas InstrumentsIn Stock: 39225TLV431BIDBZR Datasheet

MFR RecommendedRFQ

TS431AIZ-AP

STMicroelectronicsIn Stock: 1122TS431AIZ-AP Datasheet

MFR RecommendedRFQ

TS431AIZT

STMicroelectronicsIn Stock: 55282TS431AIZT Datasheet

MFR RecommendedRFQ

TS431IZ-AP

STMicroelectronicsIn Stock: 907TS431IZ-AP Datasheet

MFR RecommendedRFQ

TS431IZT

STMicroelectronicsIn Stock: 5126TS431IZT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLV431BILPR is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Reference Type: Shunt (all substitutes must be shunt-type references)
• Output Type: Adjustable (voltage must be user-adjustable)
• Voltage - Output (Min/Fixed): 1.24V (minimum output voltage must match)
• Voltage - Output (Max): 6V (maximum output voltage must match or exceed)
• Tolerance: ±0.5% or better (tolerance must be equal to or tighter than original)
• Current - Output: 15mA minimum (output current capability must meet or exceed)
• Current - Cathode: 100µA or lower (cathode current must be compatible)

Physical Compatibility Requirements:

• Mounting Type: Through Hole (package must support through-hole mounting)
• Package / Case: TO-92-3 (physical form factor must match)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant (environmental compliance must be maintained)

Substitutes are grouped into two categories: direct pin-compatible replacements (same package, same electrical specifications) and functional equivalents with relaxed tolerance specifications that remain electrically compatible within the application's design margins.

Parameter Comparison

Engineering Selection Recommendations

Direct Pin-Compatible Replacement (Recommended for Through-Hole Applications):

The TS431AIZ-AP, TS431AIZT, TS431IZ-AP, and TS431IZT are all manufactured by STMicroelectronics and maintain the TO-92-3 through-hole package form factor. These parts are electrically compatible with the TLV431BILPR within the following constraints:

• TS431AIZ-AP and TS431AIZT offer ±1% tolerance with 30mA output current capability, exceeding the original 15mA specification. These parts are suitable for applications where the relaxed tolerance is acceptable.
• TS431IZ-AP and TS431IZT offer ±2% tolerance with 30mA output current capability. These parts are suitable for applications with less stringent tolerance requirements.
• All STMicroelectronics substitutes provide extended operating temperature range (-40°C to 125°C) compared to the original part (-40°C to 85°C).
• All STMicroelectronics substitutes feature lower cathode current (60µA versus 100µA), reducing power consumption.

Surface-Mount Alternative (For PCB Redesign):

The TLV431BIDBZR is a Texas Instruments part maintaining ±0.5% tolerance and 15mA output current specifications identical to the TLV431BILPR. However, this part uses SOT-23-3 surface-mount packaging and requires PCB layout modification. This option is suitable only when PCB redesign is feasible and surface-mount assembly capability is available.

Product Status Consideration:

All substitute parts listed carry Active product status, ensuring long-term availability and supply chain stability. The TLV431BILPR's Last Time Buy status necessitates transition to one of these active alternatives for new designs or ongoing production beyond the manufacturer's end-of-life date.

Frequently Asked Questions (FAQ)

Q: Can I use TS431AIZ-AP or TS431AIZT as a direct replacement for TLV431BILPR?

A: Yes, for through-hole applications. Both parts maintain the TO-92-3 package, 1.24V to 6V output range, and ±1% tolerance. The higher output current (30mA versus 15mA) and lower cathode current (60µA versus 100µA) are compatible with the original design. The extended temperature range (-40°C to 125°C) provides additional operational margin.

Q: What is the difference between TS431AIZ-AP and TS431AIZT?

A: Both parts are electrically identical STMicroelectronics TS431 devices with ±1% tolerance. The difference is packaging format: TS431AIZ-AP is supplied in Tape & Box (TB) configuration, while TS431AIZT is supplied in Tape & Reel (TR) configuration. Select based on your procurement and assembly requirements.

Q: Can I use TS431IZ-AP or TS431IZT instead of the higher-tolerance TS431AIZ-AP variants?

A: Yes, if your application tolerates ±2% tolerance instead of ±1%. Both TS431IZ variants are electrically compatible with the TLV431BILPR and offer identical output current and temperature range specifications. Use these parts only when the relaxed tolerance meets your circuit design requirements.

Q: Why is TLV431BIDBZR not recommended as the primary substitute?

A: While TLV431BIDBZR maintains identical electrical specifications (±0.5% tolerance, 15mA output), it uses SOT-23-3 surface-mount packaging instead of the through-hole TO-92-3 package. This requires PCB redesign and surface-mount assembly capability. Through-hole alternatives (TS431 series) are recommended for direct board-level replacement without layout modification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (TLV431BIDBZR, TS431AIZ-AP, TS431AIZT, TS431IZ-AP, TS431IZT) are ROHS3 compliant, maintaining environmental compliance equivalent to the original TLV431BILPR.

Q: What is the impact of lower cathode current in STMicroelectronics substitutes?

A: The STMicroelectronics TS431 series features 60µA cathode current compared to the TLV431BILPR's 100µA. This reduction decreases power consumption in the reference circuit. This parameter is compatible with the original design and does not affect functional operation.

Q: Can I mix different substitute parts in the same production run?

A: Yes, provided your circuit design accommodates the tolerance and output current variations. If your design requires ±0.5% tolerance, use only TLV431BIDBZR. If ±1% tolerance is acceptable, use TS431AIZ-AP or TS431AIZT. If ±2% tolerance is acceptable, use TS431IZ-AP or TS431IZT. Do not mix tolerance grades within a single design unless the circuit has been validated for the full tolerance range.