REG103GA-5 Equivalent & Substitute Parts

Part Overview

The REG103GA-5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 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. Finding equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

REG103GA-5

Texas InstrumentsIn Stock: 2970REG103GA-5 Datasheet

Current PartRFQ

TPS7A2650DRVR

Texas InstrumentsIn Stock: 17467TPS7A2650DRVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REG103GA-5 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 5V
• Output Current: Minimum 500mA capability
• Output Configuration: Positive fixed output
• Voltage Input Range: Must accommodate maximum 15V input
• Regulatory Compliance: ROHS3 compliance required
• Functional Features: Enable control and protection against over-current and over-temperature conditions

The TPS7A2650DRVR meets these substitution criteria while offering enhanced specifications including higher input voltage tolerance (18V max), improved quiescent current performance, and additional control features (Power Good output and UVLO protection).

Parameter Comparison

Engineering Selection Recommendations

The TPS7A2650DRVR is the manufacturer-recommended substitute for the REG103GA-5. Both devices are ROHS3 compliant and manufactured by Texas Instruments, ensuring regulatory alignment and supply chain continuity.

The TPS7A2650DRVR offers active product status with extended availability, addressing the Last Time Buy constraint of the REG103GA-5. The substitute maintains identical output voltage and current specifications while providing superior quiescent current performance (4.5 µA versus 0.7 mA), extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), and additional protection features including Power Good output and UVLO (Under-Voltage Lock-Out).

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

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2650DRVR directly replace the REG103GA-5 without circuit modifications?

A: The TPS7A2650DRVR is functionally equivalent for the core 5V/500mA regulation function. However, package geometry differs (SOT-223-6 versus 6-WSON 2x2), requiring PCB footprint redesign. Pin configuration and control signal compatibility must be verified against application schematics.

Q: What are the key advantages of the TPS7A2650DRVR substitute?

A: The substitute provides active product status with extended supply availability, significantly lower quiescent current (4.5 µA versus 0.7 mA), extended operating temperature range to 125°C, and additional protection features including Power Good output and UVLO protection.

Q: Are both devices RoHS compliant?

A: Yes, both the REG103GA-5 and TPS7A2650DRVR are ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: What is the impact of the package change on thermal performance?

A: The 6-WSON (2x2) package of the TPS7A2650DRVR provides an exposed pad for improved thermal dissipation compared to the SOT-223-6 package. This enhancement supports better thermal management in high-current or elevated ambient temperature applications.

Q: Is the voltage dropout specification difference significant?

A: The TPS7A2650DRVR exhibits 0.33V dropout at 500mA versus 0.28V for the REG103GA-5, a 0.05V difference. This variance is negligible for most 5V regulation applications and remains within acceptable design margins for standard power supply designs.