TPS5120QDBTREP Equivalent & Substitute Parts

Part Overview

The TPS5120QDBTREP is a Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Texas Instruments in a 30-TSSOP package. This power management IC functions as a transistor driver for step-down topology applications with dual output phases and integrated synchronous rectification. The main part is currently in Active product status with 680 units available in stock.

Identifying equivalent and substitute parts is necessary when the primary part becomes unavailable, when design requirements shift toward automotive-qualified variants, or when inventory constraints require alternative sourcing from the same manufacturer's product line.

Substiute Parts

TPS5120QDBTREP

Texas InstrumentsIn Stock: 749TPS5120QDBTREP Datasheet

Current PartRFQ

TPS5120QDBTRQ1

Texas InstrumentsIn Stock: 956TPS5120QDBTRQ1 Datasheet

Parametric EquivalentRFQ

TPS5120QDBTRQ1G4

Texas InstrumentsIn Stock: 2579TPS5120QDBTRQ1G4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS5120QDBTREP is determined by strict alignment of the following critical parameters:

• Manufacturer: Texas Instruments (same manufacturer ensures design compatibility and pin-to-pin equivalence)
• Base Product Number: TPS5120 (core functional platform)
• Package / Case: 30-TFSOP (0.173", 4.40mm Width) (identical physical footprint and pin count)
• Voltage Supply Range: 4.5V ~ 28V (identical input voltage specifications)
• Switching Frequency: 300kHz (identical operating frequency)
• Duty Cycle (Max): 83% (identical maximum duty cycle)
• Synchronous Rectifier: Yes (identical rectification method)
• Control Features: Enable, Power Good, Soft Start (identical control interface)
• Operating Temperature Range: -40°C ~ 125°C (TJ) (identical thermal specifications)
• RoHS Status: ROHS3 Compliant (identical environmental compliance)

All identified substitute parts meet these criteria. Variations in product status (Active, Obsolete, Discontinued at DiGi Electronics) and automotive qualification (AEC-Q100 grade) represent secondary differentiators that do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

TPS5120QDBTREP (Primary Part - Active Status)

Use this part number for new designs and applications where standard-grade components are acceptable. Active product status ensures long-term availability and manufacturer support. This variant is suitable for industrial and commercial applications without automotive qualification requirements.

TPS5120QDBTRQ1 (Automotive-Qualified Substitute - Obsolete Status)

This part is electrically and mechanically identical to the primary part but carries AEC-Q100 automotive qualification and automotive-grade designation. Product status is Obsolete, indicating limited future availability. Use this part only when existing inventory is available and automotive qualification is a design requirement. Inventory of 913 units is currently available.

TPS5120QDBTRQ1G4 (Automotive-Qualified Substitute - Discontinued at DiGi Electronics)

This part is electrically and mechanically identical to the primary part and carries AEC-Q100 automotive qualification with automotive-grade designation. Product status is Discontinued at DiGi Electronics, indicating it is no longer actively distributed through this channel. Highest current inventory of 2554 units is available. Use this part only when automotive qualification is required and inventory sourcing through alternative channels is feasible.

For applications requiring automotive qualification, both TPS5120QDBTRQ1 and TPS5120QDBTRQ1G4 are functionally equivalent. Selection between them should be based on inventory availability and supply chain logistics rather than technical performance.

Frequently Asked Questions (FAQ)

Q: Are TPS5120QDBTRQ1 and TPS5120QDBTRQ1G4 pin-for-pin compatible with TPS5120QDBTREP?

A: Yes. All three parts share the identical 30-TFSOP package with 0.173" width and 4.40mm dimensions. Pin count, pin assignment, and electrical interface are identical across all variants.

Q: What is the difference between the standard-grade TPS5120QDBTREP and the automotive-grade variants?

A: The automotive-grade variants (TPS5120QDBTRQ1 and TPS5120QDBTRQ1G4) carry AEC-Q100 qualification, indicating compliance with automotive industry reliability and testing standards. Electrical performance, operating temperature range, and functional specifications are identical. The grade designation reflects manufacturing process controls and qualification testing, not functional capability.

Q: Can I substitute TPS5120QDBTREP with an automotive-qualified variant in a non-automotive application?

A: Yes. Automotive-qualified parts meet or exceed the specifications of standard-grade parts. Using an automotive-qualified variant in a non-automotive application introduces no technical risk and may provide additional reliability margin.

Q: Why are some variants listed as Obsolete or Discontinued at DiGi Electronics?

A: Product status reflects manufacturer lifecycle and distributor inventory decisions. Obsolete status indicates the manufacturer has discontinued active production. Discontinued at DiGi Electronics indicates the specific distributor no longer actively stocks the part. Availability through alternative distributors or existing inventory may still exist.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating of 2?

A: MSL 2 indicates the component requires protection from moisture exposure for up to one year from the date of manufacture. Standard moisture-barrier packaging and storage conditions must be maintained. All three variants share identical MSL specifications.

Q: Are all three parts ROHS3 compliant?

A: Yes. TPS5120QDBTREP, TPS5120QDBTRQ1, and TPS5120QDBTRQ1G4 are all ROHS3 compliant, meeting European Union restrictions on hazardous substances.