TPS54973PWP Equivalent & Substitute Parts

Part Overview

The TPS54973PWP is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive adjustable output applications. It delivers 9A output current with a fixed input voltage range of 3V to 4V and adjustable output voltage from 0.891V to 2.5V. The device operates at switching frequencies of 350kHz or 550kHz and includes a synchronous rectifier for improved efficiency.

This part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and secure long-term component availability for production and maintenance applications.

Substiute Parts

TPS54973PWP

Texas InstrumentsIn Stock: 6223TPS54973PWP Datasheet

Current PartRFQ

TPS54973PWPR

Texas InstrumentsIn Stock: 4220TPS54973PWPR Datasheet

DirectRFQ

TPS62871QWRXSRQ1

Texas InstrumentsIn Stock: 2703TPS62871QWRXSRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TPS54973PWP is evaluated based on the following critical parameters:

Electrical Compatibility Criteria:

• Output current rating of 9A
• Positive adjustable output configuration
• Synchronous rectifier topology
• Step-down (buck) function
• RoHS3 compliance

Packaging Compatibility:

• Surface mount technology
• Moisture sensitivity level MSL 2 (1 Year)

Substitutes are grouped into two categories:

1. Direct Packaging Equivalent (TPS54973PWPR): Identical electrical specifications with different packaging format (Tape & Reel instead of Tube). Maintains the same 28-PowerTSSOP package footprint and pinout.

2. Functional Equivalent with Enhanced Specifications (TPS62871QWRXSRQ1): Maintains 9A output current and positive adjustable output, but operates across a wider input voltage range (2.7V to 6V) and supports higher output voltage range (0.4V to 3.35V). Features higher switching frequencies (1.5MHz to 3MHz), automotive qualification (AEC-Q100), and extended operating temperature range (-40°C to 125°C). Package format differs (16-TFQFN Exposed Pad).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical and Thermal Specifications): Select TPS54973PWPR when the original design requires identical electrical performance and thermal characteristics within the 3V to 4V input range and 0.891V to 2.5V output range. This part maintains the same 28-PowerTSSOP footprint and pinout, requiring no PCB redesign. Both the main part and this substitute share Last Time Buy status, so long-term availability planning remains necessary.

For Design Flexibility and Extended Lifecycle: Select TPS62871QWRXSRQ1 when the application can accommodate a wider input voltage range (2.7V to 6V) and extended output voltage range (0.4V to 3.35V). This part offers Active product status, ensuring continued availability and support. The extended operating temperature range (-40°C to 125°C) and AEC-Q100 automotive qualification provide enhanced reliability for demanding environments. The higher switching frequencies (up to 3MHz) enable smaller external component sizing. PCB redesign is required due to the different package format (16-TFQFN Exposed Pad versus 28-PowerTSSOP).

Both substitutes maintain the 9A output current rating, positive adjustable output configuration, synchronous rectifier topology, and ROHS3 compliance required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can TPS54973PWPR be used as a direct drop-in replacement for TPS54973PWP? A: Yes. TPS54973PWPR is electrically and mechanically identical to TPS54973PWP. The only difference is packaging format (Tape & Reel versus Tube). Both use the 28-PowerTSSOP package with identical pinout and footprint, requiring no PCB modifications.

Q: What are the key differences between TPS54973PWP and TPS62871QWRXSRQ1? A: The TPS62871QWRXSRQ1 offers a wider input voltage range (2.7V to 6V versus 3V to 4V), extended output voltage range (0.4V to 3.35V versus 0.891V to 2.5V), higher switching frequencies (up to 3MHz versus 550kHz), extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), and AEC-Q100 automotive qualification. The package format differs (16-TFQFN Exposed Pad versus 28-PowerTSSOP), requiring PCB redesign.

Q: Is PCB redesign required when switching to TPS62871QWRXSRQ1? A: Yes. The TPS62871QWRXSRQ1 uses a 16-TFQFN Exposed Pad package, which differs from the 28-PowerTSSOP package of the TPS54973PWP. PCB layout modifications are necessary to accommodate the different pinout and package footprint.

Q: Are all three parts RoHS3 compliant? A: Yes. TPS54973PWP, TPS54973PWPR, and TPS62871QWRXSRQ1 are all ROHS3 compliant.

Q: What is the product status of each part? A: TPS54973PWP and TPS54973PWPR are both designated Last Time Buy, indicating end-of-life status. TPS62871QWRXSRQ1 is Active, ensuring continued availability and manufacturer support.

Q: Can TPS62871QWRXSRQ1 operate with the same 3V to 4V input voltage as the original design? A: Yes. The TPS62871QWRXSRQ1 input voltage range of 2.7V to 6V encompasses the original 3V to 4V operating window. However, the wider input range and different switching frequency characteristics may require external component value adjustments for optimal performance.

Q: What is the moisture sensitivity level for these parts? A: All three parts have a moisture sensitivity level (MSL) of 2 with a 1-year floor life rating.