TPS54357PWPR Equivalent & Substitute Parts

Part Overview

The TPS54357PWPR is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive fixed 5V output applications with 3A current capacity. This device operates across a 6.65V 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 procurement planning.

Substiute Parts

TPS54357PWPR

Texas InstrumentsIn Stock: 5363TPS54357PWPR Datasheet

Current PartRFQ

TPS62933DRLR

Texas InstrumentsIn Stock: 3071TPS62933DRLR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS54357PWPR is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive output configuration
• Output Specifications: Fixed 5V output at 3A minimum current capacity
• Input Voltage Range: Minimum 6.65V to maximum 20V compatibility
• Synchronous Rectification: Required for efficiency matching
• Thermal Performance: Operating temperature range of -40°C to 85°C or better
• Compliance: ROHS3 compliance and EAR99 classification maintained
• Packaging: Surface mount technology with compatible footprint considerations

The TPS62933DRLR qualifies as a manufacturer-recommended substitute based on functional equivalence in buck topology, positive output configuration, 3A output current capability, and synchronous rectification. While the TPS62933DRLR offers adjustable output voltage (0.8V to 22V) and extended input range (3.8V to 30V), it can be configured for fixed 5V operation through external resistor networks, making it functionally compatible for this application.

Parameter Comparison

Engineering Selection Recommendations

The TPS62933DRLR is designated as the manufacturer-recommended substitute for the TPS54357PWPR. Both devices maintain ROHS3 compliance and EAR99 export classification, ensuring regulatory continuity. The TPS62933DRLR provides extended operational temperature range (up to 150°C junction temperature versus 85°C ambient for the original part) and broader input voltage tolerance (3.8V to 30V versus 6.65V to 20V), offering enhanced design flexibility for future applications.

The primary design consideration involves package transition from 16-PowerTSSOP to SOT-583, requiring PCB layout modification. The adjustable output voltage architecture of the TPS62933DRLR necessitates external feedback resistor configuration to achieve the fixed 5V output specification, whereas the TPS54357PWPR provides factory-fixed 5V output.

Both devices support equivalent switching frequency ranges and maintain synchronous rectification for comparable efficiency performance. Inventory availability favors the TPS62933DRLR (3060 units) over the TPS54357PWPR (5270 units in Last Time Buy status), supporting long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the TPS62933DRLR directly replace the TPS54357PWPR without circuit modifications?

A: The TPS62933DRLR requires external resistor network configuration to establish fixed 5V output, whereas the TPS54357PWPR provides factory-fixed 5V. PCB layout changes are necessary due to package differences (SOT-583 versus 16-PowerTSSOP). Functional substitution is achievable with design modifications.

Q: What are the key electrical differences between these devices?

A: The TPS62933DRLR offers adjustable output voltage (0.8V to 22V) and extended input range (3.8V to 30V) compared to the fixed 5V output and 6.65V to 20V input of the TPS54357PWPR. Both maintain 3A output current and synchronous rectification. The TPS62933DRLR supports higher junction temperature operation (150°C versus 85°C ambient).

Q: Are there package compatibility concerns?

A: Yes. The TPS54357PWPR uses 16-PowerTSSOP packaging while the TPS62933DRLR uses SOT-583. These packages have different footprints and pin configurations, requiring PCB redesign for substitution.

Q: Do both devices meet the same compliance standards?

A: Both devices are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Compliance continuity is maintained across the substitution.

Q: Which device should be selected for new designs?

A: The TPS62933DRLR is recommended for new designs due to active product status, extended temperature range, broader input voltage tolerance, and superior inventory availability. The TPS54357PWPR is in Last Time Buy status and should be reserved for legacy system support only.