TPS73131DBVR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The TPS73131DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.1V output at 150mA in a SOT-23-5 surface mount package. This device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 3.1V regulated power delivery.

Substiute Parts

TPS73131DBVR

Texas InstrumentsIn Stock: 2392TPS73131DBVR Datasheet

Current PartRFQ

TPS7A2031PDBVR

Texas InstrumentsIn Stock: 2686TPS7A2031PDBVR Datasheet

MFR RecommendedRFQ

TPS73131DBVT

Texas InstrumentsIn Stock: 1914TPS73131DBVT Datasheet

Parametric EquivalentRFQ

MIC5265-3.1YD5-TR

Microchip TechnologyIn Stock: 3678MIC5265-3.1YD5-TR Datasheet

MFR RecommendedRFQ

RT9020-31GB

Richtek USA Inc.In Stock: 1158RT9020-31GB Datasheet

MFR RecommendedRFQ

RT9193-31GB

Richtek USA Inc.In Stock: 17901RT9193-31GB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TPS73131DBVR is determined by the following critical parameters:

• Output voltage fixed at 3.1V
• Output current capability of 150mA or greater
• SOT-23-5 package compatibility
• Input voltage maximum of 5.5V or greater
• Operating temperature range of -40°C to 125°C or compatible subset
• Surface mount mounting type

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts with identical or near-identical electrical specifications and the same output current rating (150mA), differing only in packaging designation or manufacturer.

Functional Substitutes: Parts with higher output current capability (300mA or 500mA) that maintain the same 3.1V output voltage, SOT-23-5 package, and core protection features, suitable for applications where increased current headroom is acceptable.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalent):

TPS73131DBVT is the primary parametric equivalent, offering identical electrical specifications and the same Last Time Buy status. This part maintains full compatibility with existing designs without performance trade-offs.

For Active Product Continuity:

TPS7A2031PDBVR (Texas Instruments, Active status) provides the most direct path to an actively manufactured alternative. It delivers double the output current (300mA) while maintaining the same 3.1V output and SOT-23-5 package. The improved quiescent current (15 µA vs. 550 µA) reduces standby power consumption. This part is suitable for designs where increased current capability does not create thermal or layout constraints.

MIC5265-3.1YD5-TR (Microchip Technology, Active status) offers parametric equivalence at 150mA output current with significantly lower quiescent current (2 µA). The package designation is TSOT-23-5 (thin variant), which maintains mechanical compatibility with SOT-23-5 footprints. Higher dropout voltage (0.5V vs. 0.1V) may require design verification in power-constrained applications.

For Higher Current Applications:

RT9193-31GB (Richtek, Active status) provides 300mA output current with improved dropout voltage (0.3V) and full -40°C to 125°C operating range. This part is recommended when design margins permit higher current capability.

RT9020-31GB (Richtek, Active status) delivers 500mA output current in the same package. Operating temperature range is limited to -40°C to 85°C; this part is suitable only for applications not requiring the full 125°C upper limit.

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can TPS73131DBVT be used as a direct drop-in replacement for TPS73131DBVR?

A: Yes. TPS73131DBVT is a parametric equivalent with identical electrical specifications, output voltage, current rating, and package. The difference is packaging format (Tape & Reel designation). Both parts are Last Time Buy status.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: TSOT-23-5 is the thin variant of SOT-23-5, with reduced height. Both packages share the same footprint and pin configuration, making them mechanically compatible on standard PCB layouts. Pin-to-pin electrical compatibility is maintained.

Q: Why does TPS7A2031PDBVR have lower quiescent current than the original part?

A: TPS7A2031PDBVR incorporates newer design architecture with improved power efficiency. The 15 µA quiescent current (vs. 550 µA) reflects advances in Texas Instruments' regulator technology. This reduces standby power draw in battery-powered or always-on applications.

Q: Can I use a 300mA or 500mA rated regulator in place of the 150mA TPS73131DBVR?

A: Yes, provided your application current draw does not exceed 150mA. Higher-rated regulators are backward compatible for lower current applications. Verify that thermal dissipation and PCB layout remain adequate for your specific design.

Q: What is the impact of higher dropout voltage in MIC5265-3.1YD5-TR?

A: MIC5265-3.1YD5-TR has 0.5V dropout at 150mA compared to 0.1V for TPS73131DBVR. This means the input voltage must be at least 0.4V higher to maintain regulated output. For a 5V input supply, this is not a constraint. For lower input voltages (below 3.6V), design verification is required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, consistent with the original TPS73131DBVR.

Q: Which substitute part has the best long-term availability?

A: TPS7A2031PDBVR, MIC5265-3.1YD5-TR, RT9193-31GB, and RT9020-31GB all carry Active product status, indicating ongoing manufacturing and distribution. These parts are preferred for new designs requiring long-term supply assurance.