TPS79228DBVR Equivalent & Substitute Parts

Part Overview

The TPS79228DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.8V output at 100mA in SOT-23-5 surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production with limited availability. Finding equivalent and substitute parts is necessary to ensure design continuity and long-term supply chain reliability for applications requiring 2.8V regulation with 100mA output capacity.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.8V
Output Current	100mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.11V @ 100mA
Quiescent Current	250 µA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, UVLO

Substitute Part Grouping Explanation

Substitution for the TPS79228DBVR is determined by the following critical parameters:

Output Voltage: Must be fixed at 2.8V
Output Current Capability: Minimum 100mA (higher ratings acceptable for same-footprint designs)
Input Voltage Range: Maximum input voltage of 5.5V or higher
Package Compatibility: SOT-23-5 or TSOT-23-5 (both SC-74A/SOT-753 footprints)
Dropout Voltage: Lower values preferred for efficiency; higher values acceptable if application permits
Operating Temperature Range: -40°C minimum and 85°C minimum upper limit
Control Features: Enable pin required
Protection: Over Current and Over Temperature protection mandatory

Substitute parts are grouped into three categories based on output current capability and packaging variant:

Category 1 - Direct Parametric Equivalent (100mA, Same Packaging)

TPS79228DBVT: Identical electrical specifications, Tape & Reel packaging variant

Category 2 - Higher Current Capability (150mA-300mA, SOT-23-5)

TPS7A2028PDBVR: 300mA output, improved quiescent current (15 µA vs 250 µA), extended temperature range
MIC5255-2.8YM5-TR: 150mA output, SOT-23-5 package
MIC5255-2.8YD5-TR: 150mA output, TSOT-23-5 package
RT9193-28GB: 300mA output, lower quiescent current (130 µA)
RT9193-28GJ5: 300mA output, TSOT-23-5 package

Category 3 - Higher Current Capability (150mA-500mA, TSOT-23-5)

MIC5301-2.8YD5-TR: 150mA output, superior dropout voltage (0.1V @ 150mA)
MIC5305-2.8YD5-TR: 150mA output, highest PSRR (85dB ~ 65dB)
MIC5319-2.8YD5-TR: 500mA output, highest current capability
MIC5323-2.8YD5-TR: 300mA output, high PSRR (80dB ~ 65dB)

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Operating Temp	Product Status
TPS79228DBVR	Texas Instruments	100mA	5.5V	0.11V @ 100mA	250 µA	SOT-23-5	-40°C ~ 85°C	Last Time Buy
TPS79228DBVT	Texas Instruments	100mA	5.5V	0.11V @ 100mA	250 µA	SOT-23-5	-40°C ~ 85°C	Last Time Buy
TPS7A2028PDBVR	Texas Instruments	300mA	6V	0.14V @ 300mA	15 µA	SOT-23-5	-40°C ~ 125°C	Active
MIC5255-2.8YM5-TR	Microchip Technology	150mA	6V	0.25V @ 150mA	150 µA	SOT-23-5	-40°C ~ 125°C	Active
MIC5255-2.8YD5-TR	Microchip Technology	150mA	6V	0.25V @ 150mA	150 µA	TSOT-23-5	-40°C ~ 125°C	Active
MIC5301-2.8YD5-TR	Microchip Technology	150mA	5.5V	0.1V @ 150mA	120 µA	TSOT-23-5	-40°C ~ 125°C	Active
MIC5305-2.8YD5-TR	Microchip Technology	150mA	5.5V	Not specified	150 µA	TSOT-23-5	-40°C ~ 125°C	Active
MIC5319-2.8YD5-TR	Microchip Technology	500mA	5.5V	0.4V @ 500mA	150 µA	TSOT-23-5	-40°C ~ 125°C	Active
MIC5323-2.8YD5-TR	Microchip Technology	300mA	5.5V	0.22V @ 300mA	150 µA	TSOT-23-5	-40°C ~ 125°C	Active
RT9193-28GB	Richtek USA Inc.	300mA	5.5V	0.3V @ 300mA	130 µA	SOT-23-5	-40°C ~ 125°C	Active
RT9193-28GJ5	Richtek USA Inc.	300mA	5.5V	0.3V @ 300mA	130 µA	TSOT-23-5	-40°C ~ 125°C	Active

Engineering Selection Recommendations

For Direct Replacement (100mA Applications)

TPS79228DBVT is the parametric equivalent with identical electrical performance. Both TPS79228DBVR and TPS79228DBVT share Last Time Buy status; however, TPS79228DBVT offers higher inventory availability (36,300 pcs vs 3,841 pcs). Both devices maintain ROHS3 compliance and MSL-1 moisture sensitivity rating.

For Active Production Designs (Recommended)

TPS7A2028PDBVR from Texas Instruments is the manufacturer-recommended upgrade path. This device is Active status with significantly improved quiescent current (15 µA vs 250 µA), extended operating temperature range (-40°C ~ 125°C), and higher output current capability (300mA). The SOT-23-5 package maintains footprint compatibility. Input voltage rating increases to 6V, providing additional design margin.

For Microchip Technology Alternatives

MIC5255-2.8YM5-TR and MIC5255-2.8YD5-TR offer 150mA output in SOT-23-5 and TSOT-23-5 packages respectively. Both are Active status with extended temperature range. The primary trade-off is higher dropout voltage (0.25V @ 150mA vs 0.11V @ 100mA on original).

MIC5301-2.8YD5-TR provides superior dropout voltage performance (0.1V @ 150mA) and lower quiescent current (120 µA) in TSOT-23-5 package, suitable for battery-powered applications requiring efficiency optimization.

MIC5323-2.8YD5-TR delivers 300mA output with high PSRR (80dB ~ 65dB) in TSOT-23-5 package, appropriate for noise-sensitive applications.

For Richtek Technology Alternatives

RT9193-28GB and RT9193-28GJ5 provide 300mA output with Active status and extended temperature range. RT9193-28GB uses standard SOT-23-5 package; RT9193-28GJ5 uses TSOT-23-5. Quiescent current is 130 µA, representing improvement over original 250 µA. Moisture sensitivity level is MSL-3 (168 hours), requiring controlled storage conditions compared to original MSL-1.

All substitute parts maintain ROHS3 compliance and EAR99 export classification matching the original device.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher output current rating in place of the TPS79228DBVR?

A: Yes. Higher current-rated devices (150mA, 300mA, 500mA) are backward compatible for applications requiring 100mA or less. The regulator will operate within its specified performance envelope at lower load currents. Verify that the package footprint (SOT-23-5 vs TSOT-23-5) matches your PCB design.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: Both packages use the same SC-74A footprint and pin configuration. TSOT-23-5 is a thinner variant. Verify your PCB assembly equipment and solder reflow profile compatibility before switching between these package types. Consult component datasheets for exact dimensional specifications.

Q: Why is the TPS79228DBVR marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production. Existing inventory is available for purchase, but no future production is planned. Designers should transition to active alternatives such as TPS7A2028PDBVR or equivalent parts from other manufacturers to ensure long-term supply availability.

Q: Is TPS7A2028PDBVR a direct drop-in replacement?

A: TPS7A2028PDBVR is functionally compatible with identical package and pin configuration. Electrical performance is superior (lower quiescent current, extended temperature range, higher output current). No design changes are required for substitution. Verify input voltage source does not exceed 6V maximum rating.

Q: Which substitute part offers the best efficiency for battery-powered applications?

A: MIC5301-2.8YD5-TR combines the lowest quiescent current among Microchip options (120 µA) with superior dropout voltage (0.1V @ 150mA). TPS7A2028PDBVR offers the lowest quiescent current overall (15 µA) among all substitutes, making it optimal for ultra-low-power designs.

Q: Can I use MIC5319-2.8YD5-TR (500mA) in a 100mA application?

A: Yes. The MIC5319-2.8YD5-TR will operate correctly at 100mA output. The higher current rating does not affect performance at lower load levels. However, the higher dropout voltage (0.4V @ 500mA) may impact efficiency in your specific application. Evaluate thermal performance and input voltage margin for your design.

Q: What is the impact of switching from SOT-23-5 to TSOT-23-5 packaging?

A: TSOT-23-5 is a thinner package variant with identical electrical performance and pin configuration. PCB footprint remains the same (SC-74A). Verify your assembly process supports thinner component heights and adjust solder reflow profiles if necessary. Consult your contract manufacturer for compatibility confirmation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance matching the original TPS79228DBVR. All devices are EAR99 classified for export purposes.

Q: What is the difference in moisture sensitivity between MSL-1 and MSL-3?

A: MSL-1 (Unlimited) allows indefinite storage without moisture bake-out. MSL-3 (168 hours) requires moisture bake-out if the component has been exposed to ambient humidity for more than 168 hours. RT9193 series devices carry MSL-3 rating. Implement appropriate moisture control procedures during storage and assembly if selecting these parts.

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