TPS78628DCQ Equivalent & Substitute Parts

Part Overview

The TPS78628DCQ is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 1.5A output current at a fixed 2.8V output voltage in a compact SOT-223-6 surface mount package. The device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The active equivalent TPS78628DCQR provides identical electrical performance with current availability.

Substiute Parts

TPS78628DCQ

Texas InstrumentsIn Stock: 3485TPS78628DCQ Datasheet

Current PartRFQ

TPS78628DCQR

Texas InstrumentsIn Stock: 2892TPS78628DCQR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS78628DCQ is based on matching the following critical electrical and mechanical parameters:

• Fixed output voltage of 2.8V
• Output current capability of 1.5A minimum
• Maximum input voltage of 5.5V or greater
• Dropout voltage performance of 0.58V @ 1.5A or lower
• SOT-223-6 package compatibility
• Identical protection feature set (Over Current, Over Temperature, Reverse Polarity, UVLO)
• Operating temperature range of -40°C to 125°C or wider

The TPS78628DCQR meets all these criteria and serves as a direct functional equivalent. The primary distinction is packaging format: the original part is supplied in standard packaging, while the substitute is available in Tape & Reel format with active product status.

Parameter Comparison

Engineering Selection Recommendations

The TPS78628DCQR is the direct substitute for the obsolete TPS78628DCQ. Both parts are manufactured by Texas Instruments and share identical electrical specifications, performance characteristics, and package geometry. The TPS78628DCQR carries active product status, ensuring long-term availability and supply chain continuity.

Selection between these parts depends on procurement requirements: the TPS78628DCQR in Tape & Reel format is suitable for automated assembly and high-volume production environments. Both parts maintain ROHS3 compliance and identical protection feature sets, making them interchangeable from an electrical and regulatory standpoint.

Frequently Asked Questions (FAQ)

Q: Can the TPS78628DCQR directly replace the TPS78628DCQ in existing designs?

A: Yes. The TPS78628DCQR is electrically and mechanically identical to the TPS78628DCQ. Both devices feature the same SOT-223-6 package pinout, output voltage, current rating, and protection features. The only difference is packaging format and product status.

Q: What is the difference between standard packaging and Tape & Reel format?

A: Standard packaging typically refers to individual component packaging suitable for manual handling or small-quantity orders. Tape & Reel (TR) format supplies components wound on continuous tape within a reel, optimized for automated pick-and-place assembly equipment used in high-volume manufacturing.

Q: Why is the TPS78628DCQ listed as obsolete?

A: Product obsolescence indicates that Texas Instruments has discontinued active production and support for this specific part number. The TPS78628DCQR remains in active production and provides identical functionality, making it the recommended replacement for new designs and ongoing production.

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

A: No. Both the TPS78628DCQ and TPS78628DCQR maintain identical RoHS3 compliance status and carry the same regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: fixed output voltage of 2.8V, output current of 1.5A, maximum input voltage of 5.5V, dropout voltage of 0.58V @ 1.5A, identical protection features (Over Current, Over Temperature, Reverse Polarity, UVLO), and SOT-223-6 package compatibility.