REG102GA-AG4 Equivalent & Substitute Parts

Part Overview

The REG102GA-AG4 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 250mA output current in a compact SOT-223-6 package and operates across the -40°C to 85°C temperature range. The part is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

REG102GA-AG4

Texas InstrumentsIn Stock: 1255REG102GA-AG4 Datasheet

Current PartRFQ

TPS7A2501DRVR

Texas InstrumentsIn Stock: 17394TPS7A2501DRVR Datasheet

MFR RecommendedRFQ

REG102GA-A

Texas InstrumentsIn Stock: 1889REG102GA-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REG102GA-AG4 are identified based on the following electrical and mechanical compatibility criteria:

Primary Substitution Parameters:

• Output Configuration: Positive adjustable
• Number of Regulators: Single output
• Mounting Type: Surface Mount
• Manufacturer: Texas Instruments
• RoHS Compliance: ROHS3 Compliant

Electrical Compatibility Criteria:

• Output current capability equal to or greater than 250mA
• Input voltage rating compatible with 10V maximum specification
• Output voltage range encompassing or exceeding 2.5V to 5.5V
• Dropout voltage performance suitable for the application
• Protection features including Over Current and Over Temperature

Two substitute parts meet these criteria with varying performance enhancements and package options.

Parameter Comparison

Engineering Selection Recommendations

REG102GA-A (Packaging Variant)

The REG102GA-A is electrically and mechanically identical to the REG102GA-AG4, with identical electrical specifications and the same SOT-223-6 package footprint. The primary difference is packaging format (Tube versus Cut Tape). This part carries Last Time Buy status, indicating limited future availability. Selection of this substitute is appropriate for direct replacement in existing designs where SOT-223-6 package compatibility is required and output current demand does not exceed 250mA.

TPS7A2501DRVR (Performance Enhancement Substitute)

The TPS7A2501DRVR is an Active product offering enhanced electrical performance and expanded operating range. Key distinctions include:

• Higher input voltage rating (18V versus 10V maximum)
• Wider output voltage range (1.24V to 17.66V versus 2.5V to 5.5V)
• Increased output current capability (300mA versus 250mA)
• Significantly lower quiescent current (4.5 µA versus 500 µA)
• Extended operating temperature range (-40°C to 125°C versus -40°C to 85°C)
• Additional control features (Power Good output)
• Enhanced protection (Under Voltage Lockout)
• Superior moisture sensitivity rating (MSL 1 Unlimited versus MSL 2 1 Year)

This substitute requires package footprint redesign due to 6-WDFN Exposed Pad configuration versus SOT-223-6. Selection is appropriate for new designs or redesigns where the expanded electrical specifications and improved performance characteristics provide system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can REG102GA-A be used as a direct drop-in replacement for REG102GA-AG4?

A: Yes. The REG102GA-A shares identical electrical specifications and the same SOT-223-6 package footprint. No circuit modifications or PCB redesign are required. The primary consideration is packaging format availability.

Q: What are the key differences between REG102GA-AG4 and TPS7A2501DRVR?

A: The TPS7A2501DRVR offers higher input voltage rating (18V), wider output voltage range (1.24V to 17.66V), increased output current (300mA), significantly lower quiescent current (4.5 µA), extended temperature range (-40°C to 125°C), and additional control features including Power Good output and Under Voltage Lockout protection. The package footprint differs (6-WDFN Exposed Pad versus SOT-223-6), requiring PCB redesign.

Q: Is the TPS7A2501DRVR suitable for applications requiring the exact 2.5V to 5.5V output range of the REG102GA-AG4?

A: Yes. The TPS7A2501DRVR output voltage range of 1.24V to 17.66V encompasses the 2.5V to 5.5V specification. Output voltage is set through external resistor divider networks and is not constrained by the part's rated range.

Q: What is the impact of package change from SOT-223-6 to 6-WDFN when substituting with TPS7A2501DRVR?

A: Package change requires PCB footprint redesign. The 6-WDFN Exposed Pad package offers improved thermal performance through the exposed pad connection. Pin assignments and signal routing must be verified against device datasheets prior to implementation.

Q: Why is REG102GA-AG4 classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. REG102GA-A (Last Time Buy status) and TPS7A2501DRVR (Active status) represent current alternatives for ongoing production requirements.

Q: Are all three parts ROHS3 compliant?

A: Yes. REG102GA-AG4, REG102GA-A, and TPS7A2501DRVR are all ROHS3 Compliant and REACH Unaffected.

Q: What is the significance of the lower quiescent current in TPS7A2501DRVR?

A: The TPS7A2501DRVR quiescent current of 4.5 µA versus 500 µA in REG102GA-AG4 represents a 99% reduction in standby power consumption. This characteristic is significant for battery-powered or low-power applications where standby current directly impacts system power budget.