REG103GA-2.5G4 Equivalent & Substitute Parts

Part Overview

The REG103GA-2.5G4 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This Surface Mount device delivers 500mA output current with a fixed 2.5V output and operates across an input voltage range up to 15V. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	REG103GA-2.5G4
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	2.5V
Output Current	500mA
Input Voltage (Max)	15V
Voltage Dropout (Max)	0.28V @ 500mA
Package / Case	SOT-223-6
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 85°C
Product Status	Discontinued at DiGi Electronics
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the REG103GA-2.5G4 is determined by strict equivalence across the following critical parameters:

Output voltage: 2.5V fixed
Output current capability: 500mA minimum
Input voltage rating: 15V maximum
Voltage dropout: 0.28V @ 500mA maximum
Package type: SOT-223-6
Mounting configuration: Surface Mount
Operating temperature range: -40°C to 85°C
Regulatory compliance: ROHS3 Compliant

The REG103GA-2.5 is identified as the manufacturer-recommended substitute, maintaining identical electrical specifications and physical packaging while offering improved availability status.

Parameter Comparison

Parameter	REG103GA-2.5G4	REG103GA-2.5
Manufacturer	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	2.5V	2.5V
Output Current	500mA	500mA
Input Voltage (Max)	15V	15V
Voltage Dropout (Max)	0.28V @ 500mA	0.28V @ 500mA
Quiescent Current (Iq)	0.7 mA	0.7 mA
PSRR	65dB (120Hz)	65dB (120Hz)
Package / Case	SOT-223-6	SOT-223-6
Operating Temperature	-40°C to 85°C	-40°C to 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Last Time Buy

Engineering Selection Recommendations

The REG103GA-2.5 is the direct equivalent for REG103GA-2.5G4 applications. Both parts are ROHS3 compliant and maintain identical electrical and thermal specifications. The primary distinction is product status: REG103GA-2.5G4 is discontinued, while REG103GA-2.5 carries Last Time Buy status, indicating limited remaining availability. For new designs or ongoing production requiring 2.5V fixed output at 500mA in SOT-223-6 packaging, REG103GA-2.5 provides the specified performance envelope with current procurement viability.

Frequently Asked Questions (FAQ)

Q: Can REG103GA-2.5 directly replace REG103GA-2.5G4 in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including output voltage, current rating, dropout voltage, package type, and operating temperature range. No circuit modifications are required.

Q: What is the difference between REG103GA-2.5G4 and REG103GA-2.5?

A: The parts are functionally equivalent. The primary difference is product lifecycle status: REG103GA-2.5G4 is discontinued, while REG103GA-2.5 is in Last Time Buy status. The suffix designation may reflect manufacturing date codes or packaging lot variations, but electrical performance is identical.

Q: Are both parts available in the same package?

A: Yes. Both REG103GA-2.5G4 and REG103GA-2.5 are supplied in SOT-223-6 Surface Mount packaging with identical pinout and footprint compatibility.

Q: What compliance certifications apply to these parts?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What is the maximum input voltage for these regulators?

A: The maximum input voltage rating is 15V for both parts. Design input voltage must not exceed this specification to prevent device damage.

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