TPS54380PWPR Equivalent & Substitute Parts

Part Overview

The TPS54380PWPR is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive adjustable output applications. It delivers 3A output current with an adjustable output voltage range from 0.891V to 5.4V, operating from a 3V to 6V input supply. The device features synchronous rectification and operates at 350kHz switching frequency in a 20-PowerTSSOP surface mount package.

This part is currently in Last Time Buy status, making it necessary to identify equivalent substitute components for new designs or long-term production planning. The TPS6281302QWRWYRQ1 has been identified as a manufacturer-recommended substitute option.

Substiute Parts

TPS54380PWPR

Texas InstrumentsIn Stock: 3392TPS54380PWPR Datasheet

Current PartRFQ

TPS6281302QWRWYRQ1

Texas InstrumentsIn Stock: 1071TPS6281302QWRWYRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS54380PWPR is evaluated based on the following critical parameters:

• Topology & Function: Both parts must be buck (step-down) switching regulators with positive output configuration
• Output Current Capability: Minimum 3A output current required
• Input Voltage Range: Must support 3V to 6V input operation
• Output Voltage Compatibility: Substitute must support adjustable or fixed output voltages within or overlapping the 0.891V to 5.4V range
• Synchronous Rectification: Both parts include integrated synchronous rectifiers
• Operating Temperature Range: Must support -40°C to 125°C operation
• Mounting & Package: Surface mount technology required; package form factor may differ based on design constraints

The TPS6281302QWRWYRQ1 qualifies as a substitute based on these parameters, though with specific design considerations noted in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

The TPS6281302QWRWYRQ1 is a valid substitute for the TPS54380PWPR based on core functional parameters: both are 3A buck regulators with positive output, synchronous rectification, and identical operating temperature ranges. The substitute is currently in active production status, addressing the Last Time Buy status of the original part.

Key design considerations for substitution:

• Output Voltage: The substitute provides a fixed 0.8V output rather than adjustable output. Applications requiring the original adjustable range (0.891V to 5.4V) must be redesigned or an alternative substitute identified.
• Switching Frequency: The substitute operates at 1.8MHz to 4MHz versus 350kHz for the original. This higher frequency reduces output filter component size but may affect EMI characteristics and thermal performance. PCB layout and filtering design must be re-evaluated.
• Package Change: Migration from 20-PowerTSSOP to 9-VFQFN requires PCB layout redesign. The smaller footprint may provide space savings but demands careful thermal management validation.
• Automotive Qualification: The substitute includes AEC-Q100 automotive-grade qualification, providing additional reliability assurance for automotive applications.
• Input Voltage: The substitute supports 2.75V minimum input, providing slightly broader input range compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TPS6281302QWRWYRQ1 directly replace the TPS54380PWPR without design changes?

A: No. While both are 3A buck regulators, the substitute has a fixed 0.8V output versus the original's adjustable output. Applications requiring output voltages outside 0.8V require circuit redesign or alternative substitutes. Additionally, the package change from 20-PowerTSSOP to 9-VFQFN necessitates PCB layout modification.

Q: What are the implications of the higher switching frequency in the substitute?

A: The substitute's 1.8MHz to 4MHz switching frequency (versus 350kHz) reduces the size of output filter inductors and capacitors, potentially lowering board area and cost. However, higher frequency increases switching losses and EMI generation. Input and output filtering designs must be re-evaluated, and EMI compliance testing is required for the new design.

Q: Is the substitute suitable for automotive applications?

A: Yes. The TPS6281302QWRWYRQ1 carries AEC-Q100 automotive-grade qualification, making it suitable for automotive applications. The original TPS54380PWPR does not specify automotive qualification.

Q: What is the impact of the package change on thermal performance?

A: The 9-VFQFN package is significantly smaller than the 20-PowerTSSOP. Thermal performance depends on PCB copper area, via placement, and thermal management design. Thermal analysis and testing are necessary to confirm adequate heat dissipation for the 3A output current in the target application.

Q: Does the substitute support the full input voltage range of the original?

A: The substitute supports 2.75V to 6V input, which covers the original's 3V to 6V range and extends lower. Both parts operate identically within the 3V to 6V overlap region.

Q: Are there RoHS compliance differences between the two parts?

A: The original TPS54380PWPR is explicitly ROHS3 compliant. RoHS status for the substitute TPS6281302QWRWYRQ1 is not specified in the provided data. Verify RoHS compliance with the manufacturer if regulatory compliance is required.