REG102GA-3.3 Equivalent & Substitute Parts

Part Overview

The REG102GA-3.3 is a linear voltage regulator IC from Texas Instruments designed to deliver a fixed 3.3V output at 250mA in a SOT-223-6 surface mount package. This device features integrated over-current and over-temperature protection with an enable control function. The part is currently in Last Time Buy status, indicating end-of-life transition. Identifying qualified substitute components ensures design continuity and supply chain reliability for applications requiring 3.3V regulation in compact form factors.

Key Parameters

Parameter	REG102GA-3.3
Manufacturer	Texas Instruments
Output Voltage (Fixed)	3.3V
Output Current	250mA
Input Voltage (Max)	10V
Dropout Voltage (Max)	0.27V @ 250mA
Quiescent Current	500 µA
Operating Temperature Range	-40°C ~ 85°C
Package Type	SOT-223-6
Control Features	Enable
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the REG102GA-3.3 is determined by the following critical parameters:

Fixed output voltage of 3.3V
Minimum output current capability of 250mA or greater
Surface mount technology with compatible pinout and thermal characteristics
Integrated protection features (over-current and over-temperature)
ROHS3 compliance and equivalent regulatory status

The TPS7A2533DRVR qualifies as a direct substitute based on these criteria. It maintains the 3.3V fixed output specification, exceeds the current requirement at 300mA, and provides enhanced performance characteristics while maintaining regulatory compliance.

Parameter Comparison

Parameter	REG102GA-3.3	TPS7A2533DRVR	Notes
Manufacturer	Texas Instruments	Texas Instruments	Same manufacturer
Output Voltage (Fixed)	3.3V	3.3V	Identical specification
Output Current	250mA	300mA	Substitute exceeds requirement
Input Voltage (Max)	10V	18V	Substitute supports wider input range
Dropout Voltage (Max)	0.27V @ 250mA	0.21V @ 300mA	Substitute offers improved performance
Quiescent Current	500 µA	4.5 µA	Substitute significantly lower
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 125°C	Substitute supports extended range
Package Type	SOT-223-6	6-WSON (2x2)	Different package; PCB layout modification required
Control Features	Enable	Enable, Power Good	Substitute includes additional Power Good output
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Equivalent protection
Product Status	Last Time Buy	Active	Substitute actively manufactured
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent compliance
MSL Rating	2 (1 Year)	1 (Unlimited)	Substitute offers superior moisture handling

Engineering Selection Recommendations

The TPS7A2533DRVR is qualified as a functional substitute for the REG102GA-3.3 based on electrical performance and regulatory compliance. Both devices are manufactured by Texas Instruments and maintain ROHS3 compliance with equivalent protection architectures.

The substitute provides measurable improvements: higher output current capability (300mA vs 250mA), lower dropout voltage (0.21V vs 0.27V), significantly reduced quiescent current (4.5 µA vs 500 µA), and extended operating temperature range (-40°C to 125°C vs -40°C to 85°C). The TPS7A2533DRVR is in active production status, ensuring long-term availability.

Design consideration: The TPS7A2533DRVR uses a 6-WSON (2x2) package instead of SOT-223-6, requiring PCB layout modification. The substitute includes a Power Good output feature not present in the original part. Thermal management characteristics differ due to package geometry; verify thermal performance for your specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2533DRVR directly replace the REG102GA-3.3 without PCB modifications?

A: No. The TPS7A2533DRVR uses a 6-WSON (2x2) package while the REG102GA-3.3 uses SOT-223-6. PCB layout changes are required, including pad pattern redesign and potential trace routing adjustments. Pin functionality differs; verify pinout compatibility before implementation.

Q: What are the key electrical advantages of the TPS7A2533DRVR?

A: The substitute offers three primary improvements: 20% higher output current (300mA vs 250mA), 22% lower dropout voltage (0.21V vs 0.27V at rated current), and 99% lower quiescent current (4.5 µA vs 500 µA). These characteristics reduce power dissipation and improve efficiency in battery-powered applications.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the REG102GA-3.3 and TPS7A2533DRVR are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Regulatory documentation is equivalent for both devices.

Q: What is the significance of the Last Time Buy status for the REG102GA-3.3?

A: Last Time Buy indicates the manufacturer will discontinue production. Existing inventory will be depleted without replenishment. Transitioning to the TPS7A2533DRVR ensures continued supply availability and design sustainability.

Q: Does the Power Good output on the TPS7A2533DRVR require implementation in my design?

A: No. The Power Good output is an optional feature. If your application does not require voltage monitoring, this output can remain unconnected without affecting regulator operation.

Q: How do the thermal characteristics compare between these packages?

A: The 6-WSON (2x2) package of the TPS7A2533DRVR provides superior thermal performance compared to SOT-223-6 due to larger exposed pad area. Verify thermal simulation for your specific power dissipation profile to confirm adequate heat dissipation in your application environment.

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