TPS73028DBVT Equivalent & Substitute Parts

Part Overview

The TPS73028DBVT is a linear voltage regulator IC from Texas Instruments, delivering a fixed 2.8V output at 200mA in a SOT-23-5 surface mount package. This device is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 2.8V regulation with 200mA output capacity.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.8V
Output Current	200mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.21V @ 200mA
Quiescent Current	250 µA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, UVLO
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

Fixed output voltage of 2.8V
Input voltage maximum of 5.5V or greater
Operating temperature range of -40°C to 125°C
Surface mount package (SOT-23-5 or TSOT-23-5)
Output current capability equal to or exceeding 200mA

Substitution Categories:

Parametric Equivalents — Parts with identical or superior electrical specifications and the same package footprint. These are direct replacements with no design modifications required.

Manufacturer Recommended Substitutes — Parts with higher output current capability or improved performance characteristics. These provide enhanced functionality while maintaining voltage and package compatibility.

Cross-Manufacturer Alternatives — Parts from different manufacturers meeting the same electrical and mechanical requirements, offering supply chain diversification.

Parameter Comparison

Part Number	Manufacturer	Output Current	Dropout Voltage	Quiescent Current	Package	Product Status
TPS73028DBVT	Texas Instruments	200mA	0.21V @ 200mA	250 µA	SOT-23-5	Last Time Buy
TPS73028DBVR	Texas Instruments	200mA	0.21V @ 200mA	250 µA	SOT-23-5	Last Time Buy
TPS79328QDBVRQ1	Texas Instruments	200mA	0.2V @ 200mA	220 µA	SOT-23-5	Active
TLV74328PDBVR	Texas Instruments	300mA	0.29V @ 300mA	60 µA	SOT-23-5	Active
MIC5301-2.8YD5-TR	Microchip Technology	150mA	0.1V @ 150mA	120 µA	TSOT-23-5	Active
MIC5305-2.8YD5-TR	Microchip Technology	150mA	Not Specified	150 µA	TSOT-23-5	Active
MIC5319-2.8YD5-TR	Microchip Technology	500mA	0.4V @ 500mA	150 µA	TSOT-23-5	Active
MIC5323-2.8YD5-TR	Microchip Technology	300mA	0.22V @ 300mA	150 µA	TSOT-23-5	Active
RT9193-28GB	Richtek USA Inc.	300mA	0.3V @ 300mA	130 µA	SOT-23-5	Active
RT9193-28GJ5	Richtek USA Inc.	300mA	0.3V @ 300mA	130 µA	TSOT-23-5	Active

Engineering Selection Recommendations

Direct Replacement (No Design Changes Required):

TPS73028DBVR is a parametric equivalent with identical electrical specifications and Last Time Buy status. This part maintains the same output current, dropout voltage, and quiescent current as the TPS73028DBVT, differing only in packaging format (Tape & Reel vs. Tape & Reel variant).

TPS79328QDBVRQ1 is an active product from Texas Instruments with superior performance characteristics. It delivers equivalent 200mA output current with lower dropout voltage (0.2V vs. 0.21V) and reduced quiescent current (220 µA vs. 250 µA). This part carries AEC-Q100 automotive qualification and is recommended for new designs requiring long-term availability.

Enhanced Capability Substitutes (Higher Output Current):

TLV74328PDBVR provides 300mA output capacity while maintaining 2.8V fixed output and SOT-23-5 package compatibility. This part is active and suitable for applications requiring additional current headroom. Quiescent current is significantly reduced to 60 µA.

RT9193-28GB and RT9193-28GJ5 deliver 300mA output current from Richtek USA Inc. Both maintain 2.8V output and -40°C to 125°C operating range. RT9193-28GB uses standard SOT-23-5 packaging; RT9193-28GJ5 uses TSOT-23-5 thin packaging. Both are active products.

Cross-Manufacturer Alternatives (Microchip Technology):

MIC5319-2.8YD5-TR provides the highest output current at 500mA in TSOT-23-5 packaging, suitable for applications requiring significant current capacity while maintaining 2.8V regulation.

MIC5323-2.8YD5-TR delivers 300mA output current in TSOT-23-5 packaging with improved PSRR performance (80dB ~ 65dB across 1kHz ~ 10kHz).

MIC5301-2.8YD5-TR and MIC5305-2.8YD5-TR provide 150mA output current. These parts are suitable only if application current requirements do not exceed 150mA, as they fall below the TPS73028DBVT specification.

Compliance and Certification:

All listed substitutes maintain ROHS3 compliance and REACH unaffected status. TPS79328QDBVRQ1 includes AEC-Q100 automotive qualification for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can TPS73028DBVR be used as a direct replacement for TPS73028DBVT?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 200mA output current, 0.21V dropout voltage at 200mA, 250 µA quiescent current, and SOT-23-5 packaging. The difference is packaging format (Tape & Reel variant). No design changes are required.

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

A: TSOT-23-5 is a thin variant of SOT-23-5 with reduced height. Both packages are mechanically and electrically compatible for PCB footprint purposes. Verify board assembly equipment compatibility with thin package specifications before design implementation.

Q: Can I use MIC5301-2.8YD5-TR or MIC5305-2.8YD5-TR as substitutes?

A: These parts are not suitable direct replacements. Both deliver only 150mA output current, which is below the TPS73028DBVT specification of 200mA. Use these parts only if your application current requirement does not exceed 150mA.

Q: Why is TPS79328QDBVRQ1 recommended for new designs?

A: TPS79328QDBVRQ1 is an active product with superior performance: lower dropout voltage (0.2V vs. 0.21V), reduced quiescent current (220 µA vs. 250 µA), and AEC-Q100 automotive qualification. It ensures long-term supply availability and improved efficiency compared to Last Time Buy alternatives.

Q: Can I use higher output current parts like TLV74328PDBVR or RT9193-28GB?

A: Yes. Parts with output current ratings equal to or exceeding 200mA are compatible substitutes. Higher current capability provides design margin and does not negatively impact applications designed for 200mA. Verify that quiescent current and dropout voltage specifications meet your power budget requirements.

Q: Are Microchip Technology MIC53xx series parts suitable alternatives?

A: Yes, provided output current requirements are met. MIC5319-2.8YD5-TR (500mA) and MIC5323-2.8YD5-TR (300mA) are suitable for 200mA applications. Both use TSOT-23-5 packaging and are active products. MIC5301 and MIC5305 (150mA) are not suitable for 200mA applications.

Q: What is the significance of Last Time Buy status?

A: Last Time Buy indicates the manufacturer will discontinue production. TPS73028DBVT and TPS73028DBVR are end-of-life parts. For new designs or long-term production, select active alternatives such as TPS79328QDBVRQ1, TLV74328PDBVR, or Microchip Technology equivalents.

Q: Do all substitute parts maintain the same protection features?

A: Protection features vary. TPS73028DBVT includes Over Current, Over Temperature, Reverse Polarity, and UVLO protection. TLV74328PDBVR includes Current Limit, Thermal Shutdown, and UVLO. Microchip MIC53xx series include Over Current and Over Temperature protection. Verify protection feature requirements for your application before selection.

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