TPS54973PWPR Equivalent & Substitute Parts

Part Overview

The TPS54973PWPR is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for step-down voltage conversion with positive adjustable output. It delivers 9A output current and operates across an input voltage range of 3V to 4V, with adjustable output voltage from 0.891V to 2.5V. The device is currently in Last Time Buy status, indicating end-of-life phase. Finding equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

TPS54973PWPR

Texas InstrumentsIn Stock: 4220TPS54973PWPR Datasheet

Current PartRFQ

TPS62871QWRXSRQ1

Texas InstrumentsIn Stock: 2703TPS62871QWRXSRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS54973PWPR is determined by the following critical parameters:

Output current capability must equal or exceed 9A to maintain system performance requirements. The buck topology with positive adjustable output configuration is mandatory for functional equivalence. Synchronous rectifier presence ensures efficiency parity. Input voltage range compatibility requires the substitute to accept the 3V to 4V input specification. Output voltage adjustability must support the 0.891V minimum threshold and accommodate the 2.5V maximum requirement. Surface mount packaging is required for PCB integration compatibility. RoHS3 compliance and equivalent moisture sensitivity level (MSL 2) ensure regulatory and manufacturing process alignment.

The TPS62871QWRXSRQ1 qualifies as a substitute based on these criteria: it maintains 9A output current, buck topology with positive adjustable output, synchronous rectification, surface mount configuration, and RoHS3 compliance. While the TPS62871QWRXSRQ1 offers extended input voltage range (2.7V to 6V) and lower minimum output voltage (0.4V), these represent functional enhancements rather than limitations for the TPS54973PWPR application.

Parameter Comparison

Engineering Selection Recommendations

The TPS62871QWRXSRQ1 is the qualified substitute for the TPS54973PWPR based on product lifecycle and compliance status. The TPS54973PWPR is in Last Time Buy phase, making the active-status TPS62871QWRXSRQ1 the appropriate long-term alternative. Both devices maintain ROHS3 compliance and equivalent MSL ratings, ensuring manufacturing process compatibility. The TPS62871QWRXSRQ1 carries AEC-Q100 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components. The extended operating temperature range (-40°C to 125°C) of the TPS62871QWRXSRQ1 offers broader environmental performance compared to the TPS54973PWPR (-40°C to 85°C). Package transition from 28-PowerTSSOP to 16-TFQFN requires PCB layout redesign but delivers improved thermal performance through the exposed pad design.

Frequently Asked Questions (FAQ)

Q: Can the TPS62871QWRXSRQ1 directly replace the TPS54973PWPR without circuit modifications?

A: Functional substitution is possible due to matching output current (9A), buck topology, positive adjustable output configuration, and synchronous rectification. However, package geometry differs (28-PowerTSSOP versus 16-TFQFN), requiring PCB layout redesign. Input and output voltage ranges of the TPS62871QWRXSRQ1 encompass the TPS54973PWPR specifications, ensuring voltage compatibility.

Q: What are the key differences between these two parts?

A: The TPS62871QWRXSRQ1 offers extended input voltage range (2.7V to 6V versus 3V to 4V), lower minimum output voltage (0.4V versus 0.891V), higher maximum output voltage (3.35V versus 2.5V), higher switching frequency options (up to 3MHz versus 550kHz), extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), and smaller package footprint (16-TFQFN versus 28-PowerTSSOP). The TPS62871QWRXSRQ1 includes AEC-Q100 automotive qualification.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant with MSL 2 ratings and equivalent moisture sensitivity handling. The TPS62871QWRXSRQ1 carries AEC-Q100 automotive qualification, which the TPS54973PWPR does not specify. Both are REACH unaffected and classified under ECCN EAR99.

Q: What is the impact of package change on design implementation?

A: The transition from 28-PowerTSSOP to 16-TFQFN requires complete PCB footprint redesign. The 16-TFQFN package is significantly smaller, potentially reducing board area. The exposed pad in the 16-TFQFN design improves thermal dissipation compared to the 28-PowerTSSOP configuration. Signal routing and decoupling capacitor placement must be re-evaluated for the new package geometry.

Q: Why is the TPS54973PWPR in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this product line. The TPS62871QWRXSRQ1 represents the active successor within Texas Instruments' buck regulator portfolio, offering enhanced specifications and broader application support.