TPS40055PWPR Equivalent & Substitute Parts

Part Overview

The TPS40055PWPR is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in a 16-HTSSOP package. This active product functions as a transistor driver for step-down voltage conversion applications with a single output phase. The TPS40055PWPR is currently in active production status with 21,356 units in stock.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility is required across product generations. The TPS40053PWPR and TPS40054PWPR are legacy devices marked as "Not For New Designs," while the TPS40057PWPR remains active and represents the current alternative within this controller family.

Substiute Parts

TPS40055PWPR

Texas InstrumentsIn Stock: 21419TPS40055PWPR Datasheet

Current PartRFQ

TPS40053PWPR

Texas InstrumentsIn Stock: 23091TPS40053PWPR Datasheet

Parametric EquivalentRFQ

TPS40054PWPR

Texas InstrumentsIn Stock: 3570TPS40054PWPR Datasheet

Parametric EquivalentRFQ

TPS40057PWPR

Texas InstrumentsIn Stock: 31327TPS40057PWPR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS40055PWPR is determined by strict parameter matching across the following critical criteria:

Mandatory Matching Parameters:

• Topology: Buck (step-down)
• Output Configuration: Positive
• Number of Outputs: 1
• Output Phases: 1
• Voltage Supply Range: 8V ~ 40V
• Duty Cycle (Max): 94%
• Synchronous Rectifier: Yes
• Clock Sync: Yes
• Control Features: Current Limit, Enable, Frequency Control, Soft Start
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Package / Case: 16-PowerTSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 2 (1 Year)

Variable Parameter (Allows Substitution):

• Frequency - Switching: The TPS40055PWPR supports up to 1MHz, while the TPS40053PWPR operates at 500kHz. Both TPS40054PWPR and TPS40057PWPR support up to 1MHz.

All four parts (TPS40055PWPR, TPS40053PWPR, TPS40054PWPR, TPS40057PWPR) meet the mandatory parameter requirements and are therefore parametric equivalents within this buck controller family.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Active Products): The TPS40055PWPR and TPS40057PWPR are both active products with full production support. Both devices support switching frequencies up to 1MHz and carry identical compliance certifications (ROHS3, REACH Unaffected). Selection between these two active alternatives should be based on application-specific switching frequency requirements and inventory availability. The TPS40057PWPR currently maintains higher inventory levels (31,300 units) compared to the TPS40055PWPR (21,356 units).

Legacy Alternatives (Not For New Designs): The TPS40053PWPR and TPS40054PWPR are designated "Not For New Designs" and should only be considered for sustaining production of existing products or when supply of active alternatives is unavailable. The TPS40053PWPR operates at a fixed 500kHz switching frequency, which may impact power conversion efficiency in applications requiring higher frequency operation. The TPS40054PWPR supports up to 1MHz operation but carries legacy status.

Compliance Considerations: All four parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility across industrial and commercial applications. Moisture sensitivity level remains constant at MSL 2 (1 Year) across all variants.

Frequently Asked Questions (FAQ)

Q: Can the TPS40053PWPR replace the TPS40055PWPR in new designs? A: No. The TPS40053PWPR is marked "Not For New Designs." For new product development, use either the TPS40055PWPR or TPS40057PWPR, both of which are active products.

Q: What is the primary difference between TPS40055PWPR and TPS40057PWPR? A: Both parts are functionally equivalent with identical electrical specifications and support up to 1MHz switching frequency. The primary difference is product status and inventory availability. TPS40057PWPR maintains higher stock levels (31,300 units vs. 21,356 units).

Q: Can I use TPS40053PWPR if my application requires 1MHz switching frequency? A: No. The TPS40053PWPR operates at a fixed 500kHz switching frequency. Applications requiring up to 1MHz operation must use TPS40055PWPR, TPS40054PWPR, or TPS40057PWPR.

Q: Are all substitute parts pin-compatible? A: Yes. All four parts use the identical 16-PowerTSSOP package with 0.173" width and 4.40mm dimensions, ensuring direct PCB footprint compatibility.

Q: Do all parts meet the same environmental and compliance standards? A: Yes. All four parts are ROHS3 compliant, REACH Unaffected, and maintain MSL 2 (1 Year) moisture sensitivity rating. Operating temperature range is -40°C to 85°C across all variants.

Q: Which part should I select for a new design with supply constraints? A: Select the TPS40057PWPR. It is an active product with the highest inventory availability (31,300 units) and identical electrical specifications to the TPS40055PWPR.

Q: Can legacy parts (TPS40053PWPR, TPS40054PWPR) be used in production? A: Legacy parts may be used only for sustaining production of existing products already in the field. For new production runs or new designs, active products (TPS40055PWPR or TPS40057PWPR) are required.