REG103GA-2.5 Equivalent & Substitute Parts

Part Overview

The REG103GA-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output applications with 500mA current capacity in SOT-223-6 surface mount packaging. This device is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently using this regulator.

Substiute Parts

REG103GA-2.5

Texas InstrumentsIn Stock: 1200REG103GA-2.5 Datasheet

Current PartRFQ

TPS7A2625DRVR

Texas InstrumentsIn Stock: 3628TPS7A2625DRVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REG103GA-2.5 is based on the following critical parameters:

• Fixed output voltage of 2.5V
• Minimum output current rating of 500mA
• Positive output configuration
• Single regulator topology
• Surface mount technology compatibility
• Enable control feature
• Over current and over temperature protection
• ROHS3 compliance

The TPS7A2625DRVR qualifies as a manufacturer-recommended substitute based on matching these core electrical and functional specifications while offering enhanced performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The TPS7A2625DRVR is the manufacturer-recommended substitute for the REG103GA-2.5. Both devices are ROHS3 compliant and manufactured by Texas Instruments. The substitute part offers active product status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the original part.

The TPS7A2625DRVR provides enhanced specifications including higher maximum input voltage (18V vs 15V), extended operating temperature range (-40°C to 125°C vs -40°C to 85°C), and additional control features (Power Good output) and protection (UVLO). The quiescent current is significantly lower (4.5 µA vs 0.7 mA), beneficial for battery-powered applications.

Package transition from SOT-223-6 to 6-WSON (2x2) requires PCB layout modification. Both packages are surface mount technologies with comparable thermal performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2625DRVR directly replace the REG103GA-2.5 without circuit modifications?

A: The TPS7A2625DRVR matches the core electrical specifications (2.5V output, 500mA current, enable control, protection features). However, the package change from SOT-223-6 to 6-WSON (2x2) requires PCB layout redesign. Pin configuration must be verified against application schematics.

Q: What are the key differences between these parts?

A: The substitute offers active product status, lower quiescent current (4.5 µA vs 0.7 mA), higher input voltage rating (18V vs 15V), extended temperature range (-40°C to 125°C vs -40°C to 85°C), and additional features (Power Good output, UVLO protection). Voltage dropout is slightly higher (0.33V vs 0.28V @ 500mA).

Q: Is the package change from SOT-223-6 to 6-WSON (2x2) significant?

A: Yes. Both are surface mount packages, but they have different footprints and pin layouts. PCB redesign is required. The 6-WSON package is smaller and includes an exposed pad for improved thermal performance.

Q: Are both parts RoHS compliant?

A: Yes. Both the REG103GA-2.5 and TPS7A2625DRVR are ROHS3 compliant.

Q: Why is the original part marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued this product line. The TPS7A2625DRVR represents the active replacement offering equivalent functionality with enhanced performance and long-term availability.