TPS54353PWPR Equivalent & Substitute Parts

Part Overview

The TPS54353PWPR is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for step-down voltage conversion with a fixed 1.5V 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 in Last Time Buy status, making identification of suitable alternatives essential for ongoing design support and production continuity.

Substiute Parts

TPS54353PWPR

Texas InstrumentsIn Stock: 3337TPS54353PWPR Datasheet

Current PartRFQ

TPS62933DRLR

Texas InstrumentsIn Stock: 3071TPS62933DRLR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS62933DRLR qualifies as a functional substitute based on the following alignment criteria:

Common Electrical Characteristics:

• Manufacturer: Texas Instruments (same source)
• Topology: Buck switching regulator with synchronous rectification
• Output Current Rating: 3A (matches primary part)
• Input Voltage Overlap: TPS54353PWPR operates 4.5V–20V; TPS62933DRLR operates 3.8V–30V (compatible range includes 4.5V–20V)
• Switching Frequency: TPS62933DRLR range of 200kHz–2.2MHz encompasses the TPS54353PWPR frequencies
• Compliance: Both ROHS3 compliant, EAR99 classification, HTSUS 8542.39.0001

Key Substitution Constraint: The TPS62933DRLR features adjustable output voltage (0.8V–22V) versus the fixed 1.5V output of the TPS54353PWPR. This requires external resistor network configuration to achieve the 1.5V fixed output equivalent. The substitute part's wider input voltage range (3.8V–30V) and extended operating temperature range (-40°C to 150°C TJ) provide additional design margin.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility: The TPS62933DRLR is electrically compatible as a substitute for the TPS54353PWPR within the specified input voltage range (4.5V–20V overlap). Both devices maintain ROHS3 compliance and identical EAR99 export classification, ensuring regulatory continuity.

Design Considerations:

1. Package transition from 16-PowerTSSOP to SOT-583 requires PCB layout modification and thermal management re-evaluation.
2. Output voltage configuration: The TPS62933DRLR requires external feedback resistor network to establish 1.5V fixed output, adding component count and design complexity compared to the fixed-output primary part.
3. Temperature performance: The substitute's extended operating range (-40°C to 150°C junction temperature) provides additional thermal margin for high-ambient or high-power-dissipation applications.
4. Moisture sensitivity: MSL 1 rating of the substitute eliminates the 1-year shelf-life constraint of the primary part's MSL 2 rating.

Active Product Status: The TPS62933DRLR maintains active manufacturing status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the TPS54353PWPR.

Frequently Asked Questions (FAQ)

Q: Can the TPS62933DRLR directly replace the TPS54353PWPR without circuit modifications? A: No. While both are 3A buck regulators from Texas Instruments with compatible input voltage ranges, the TPS62933DRLR has adjustable output voltage. Achieving the 1.5V fixed output requires external resistor divider configuration on the feedback pin. The package change from 16-PowerTSSOP to SOT-583 also necessitates PCB redesign.

Q: What are the key electrical parameters that determine substitution compatibility? A: Output current rating (3A match), input voltage overlap (4.5V–20V common range), topology (both buck with synchronous rectification), and switching frequency compatibility (TPS62933DRLR range encompasses TPS54353PWPR frequencies). Compliance certifications (ROHS3, EAR99) must also align.

Q: Does the package difference affect thermal performance? A: Yes. The 16-PowerTSSOP and SOT-583 packages have different thermal characteristics. Thermal modeling and PCB layout optimization are required for the SOT-583 to ensure equivalent or acceptable thermal performance in the target application.

Q: Is the TPS62933DRLR suitable for applications requiring the exact -40°C to 85°C operating range? A: Yes. The TPS62933DRLR's operating range of -40°C to 150°C (junction temperature) fully encompasses the -40°C to 85°C ambient requirement of the primary part, providing additional margin.

Q: What is the impact of the MSL rating difference? A: The TPS54353PWPR has MSL 2 (1-year shelf life), while the TPS62933DRLR has MSL 1 (unlimited shelf life). The substitute offers superior moisture handling and eliminates time-sensitive storage constraints, reducing inventory management complexity.

Q: Are there any compliance or export restrictions that differ between these parts? A: No. Both parts share identical ROHS3 compliance status, EAR99 export classification, and HTSUS code (8542.39.0001), ensuring regulatory continuity in design transitions.