TPS54356MPWPREP Equivalent & Substitute Parts

Part Overview

The TPS54356MPWPREP is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for step-down voltage conversion with a fixed 3.3V output at 3A maximum current. This device operates across a 4.5V to 20V input range and features synchronous rectification for improved efficiency. The part is currently obsolete, making identification of compatible substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

TPS54356MPWPREP

Texas InstrumentsIn Stock: 791TPS54356MPWPREP Datasheet

Current PartRFQ

TPS54350MPWPREP

Texas InstrumentsIn Stock: 7726TPS54350MPWPREP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS54356MPWPREP is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Input voltage range: 4.5V to 20V minimum
• Output current capability: 3A minimum
• Synchronous rectifier topology: Required
• Switching frequency: 250kHz or 500kHz operation
• Operating temperature range: -55°C to 125°C minimum

Mechanical & Packaging Requirements:

• Package type: 16-PowerTSSOP (0.173", 4.40mm Width)
• Mounting type: Surface Mount
• Pin-to-pin compatibility with 16-HTSSOP supplier package

Compliance Requirements:

• RoHS3 compliance
• MSL rating: 2 or better
• REACH unaffected status

The TPS54350MPWPREP qualifies as a substitute based on matching all mechanical, electrical input/output range, and compliance parameters. The key distinction is output configuration: while the TPS54356MPWPREP provides a fixed 3.3V output, the TPS54350MPWPREP offers adjustable output voltage (0.891V to 17.2V), allowing it to be configured for 3.3V operation through external resistor networks.

Parameter Comparison

Engineering Selection Recommendations

The TPS54350MPWPREP is the manufacturer-recommended substitute for the obsolete TPS54356MPWPREP. Both devices share identical electrical performance specifications, package geometry, and compliance certifications. The TPS54350MPWPREP maintains active product status, ensuring long-term availability and supply chain continuity.

The primary design consideration when transitioning from TPS54356MPWPREP to TPS54350MPWPREP is the shift from fixed to adjustable output voltage configuration. The TPS54350MPWPREP requires external feedback resistor networks to establish the 3.3V output voltage, whereas the TPS54356MPWPREP provided this voltage internally. This substitution is electrically and mechanically compatible with identical pin assignments and package footprints, requiring only modifications to the output voltage divider circuit.

Both devices maintain ROHS3 compliance and identical MSL ratings, supporting direct substitution in existing designs with minimal redesign effort.

Frequently Asked Questions (FAQ)

Q: Can the TPS54350MPWPREP directly replace the TPS54356MPWPREP without circuit modifications?

A: The TPS54350MPWPREP is pin-compatible and mechanically interchangeable with the TPS54356MPWPREP. However, the output voltage configuration differs: the TPS54350MPWPREP requires external resistor networks to set the output voltage to 3.3V, whereas the TPS54356MPWPREP provides this voltage internally. Circuit modifications to the feedback network are necessary.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the TPS54356MPWPREP and TPS54350MPWPREP use the 16-PowerTSSOP package with identical dimensions (0.173", 4.40mm Width). PCB footprints are directly compatible.

Q: What is the significance of the TPS54356MPWPREP being obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Texas Instruments. The TPS54350MPWPREP, with active product status, is the recommended path for new designs and ongoing production support.

Q: Do both parts support the same input voltage range?

A: Yes. Both the TPS54356MPWPREP and TPS54350MPWPREP operate across 4.5V to 20V input voltage range with identical switching frequency options (250kHz, 500kHz) and synchronous rectifier topology.

Q: Are there compliance or certification differences between these parts?

A: No. Both parts maintain ROHS3 compliance, identical MSL ratings (2, 1 Year), and REACH unaffected status, supporting direct substitution from a regulatory perspective.