TPS51513RHBT Equivalent & Substitute Parts

Part Overview

The TPS51513RHBT is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments, housed in a 32-VQFN (5x5) package. This device functions as a transistor driver for single-output buck topology applications with integrated current limit, enable, on-time control, and power good features. The part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications currently utilizing this controller.

Substiute Parts

TPS51513RHBT

Texas InstrumentsIn Stock: 3417TPS51513RHBT Datasheet

Current PartRFQ

TPS56637RPAR

Texas InstrumentsIn Stock: 1000247TPS56637RPAR Datasheet

MFR RecommendedRFQ

TPS51518RUKT

Texas InstrumentsIn Stock: 2972TPS51518RUKT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS51513RHBT are identified based on the following critical parameters that define functional equivalence:

• Manufacturer: Texas Instruments (maintaining design ecosystem consistency)
• Topology: Buck step-down configuration
• Output Configuration: Positive output
• Synchronous Rectifier: Integrated synchronous rectification capability
• Supply Voltage Range: Compatibility with 3V ~ 28V input range
• Control Features: Presence of current limit, enable, and power good functions
• RoHS & Compliance: ROHS3 compliance and equivalent MSL ratings
• Mounting & Package: Surface mount QFN family packages

The substitute parts TPS51518RUKT and TPS56637RPAR meet these criteria with variations in package size, output configuration flexibility, and operating temperature ranges. Both alternatives maintain buck topology functionality, synchronous rectification, and Texas Instruments manufacturing standards.

Parameter Comparison

Engineering Selection Recommendations

TPS51518RUKT is suitable for applications requiring a controller-based architecture with 2-bit VID voltage regulation capability. This part maintains the same supply voltage range (3V ~ 28V) and operating temperature floor as the TPS51513RHBT, with an extended upper temperature limit to 105°C. The 20-WFQFN package (3x3) offers reduced footprint compared to the 32-VFQFN, making it advantageous for space-constrained designs. Active product status ensures long-term availability and supply chain stability.

TPS56637RPAR is appropriate for applications requiring adjustable output voltage regulation (0.6V to 13V) with higher output current capability (6A). This integrated regulator topology differs from the controller-only approach of the TPS51513RHBT. The 10-PowerVFQFN package provides the smallest footprint among the three options. Extended operating temperature range (-40°C to 150°C junction temperature) supports demanding thermal environments. Active product status and high inventory levels provide supply assurance.

Both substitutes carry ROHS3 compliance and equivalent MSL ratings, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can TPS51518RUKT directly replace TPS51513RHBT in existing designs?

A: Direct replacement requires PCB layout and schematic review. While both are buck controllers with identical supply voltage ranges, the TPS51518RUKT uses a smaller 20-WFQFN package versus the 32-VFQFN of the main part. Pin configuration and control feature implementation differ. Design validation is necessary.

Q: What is the primary functional difference between TPS51513RHBT and TPS56637RPAR?

A: TPS51513RHBT is a controller IC requiring external power stage components. TPS56637RPAR is an integrated buck regulator with internal power switches and adjustable output voltage. TPS56637RPAR includes integrated 6A output capability, while TPS51513RHBT is a driver for external transistor stages.

Q: Are all three parts RoHS compliant?

A: Yes. TPS51513RHBT, TPS51518RUKT, and TPS56637RPAR are all ROHS3 compliant with MSL rating 2 (1 Year), meeting standard industrial and commercial manufacturing requirements.

Q: Which substitute offers the best thermal performance?

A: TPS56637RPAR specifies the widest operating temperature range (-40°C to 150°C junction temperature), suitable for extended thermal environments. TPS51518RUKT operates to 105°C, while TPS51513RHBT is rated to 100°C ambient.

Q: What is the inventory status of these parts?

A: TPS51513RHBT is Last Time Buy with 3400 units in stock. TPS51518RUKT is Active with 2922 units available. TPS56637RPAR is Active with 1000200 units in stock, providing the highest supply assurance.

Q: Do all parts support synchronous rectification?

A: TPS51513RHBT and TPS56637RPAR explicitly support synchronous rectification. TPS51518RUKT synchronous rectifier capability is not specified in the provided data.