TPS79225DBVR Linear Voltage Regulator 2.5V 100mA Equivalent & Substitute Parts

Part Overview

The TPS79225DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output at 100mA in a SOT-23-5 surface mount package. This device features integrated protection including over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) functions. The part is classified as Last Time Buy, indicating end-of-life status. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 2.5V regulated output in compact form factors.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	100mA
Input Voltage (Max)	5.5V
Quiescent Current (Iq)	250 µA
Package Type	SOT-23-5 (SC-74A)
Mounting Type	Surface Mount
Operating Temperature	-40°C to 85°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, UVLO
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TPS79225DBVR is determined by the following critical parameters: fixed 2.5V output voltage, SOT-23-5 package compatibility, surface mount capability, and positive output configuration. Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications (100mA output current, 250 µA quiescent current, 5.5V maximum input) and differ only in packaging format (Cut Tape vs. Tape & Reel) or product status.

Functional Substitutes provide higher output current capability (150mA to 300mA) while maintaining 2.5V fixed output, SOT-23-5 package form factor, and compatible protection features. These parts accommodate applications requiring higher current delivery within the same physical footprint and are suitable when the original 100mA specification is not a hard constraint.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Iq (µA)	Package	Temp Range	Product Status
TPS79225DBVR	Texas Instruments	100mA	5.5V	250	SOT-23-5	-40°C to 85°C	Last Time Buy
TPS79225DBVT	Texas Instruments	100mA	5.5V	250	SOT-23-5	-40°C to 85°C	Last Time Buy
TPS7A2025PDBVR	Texas Instruments	300mA	6V	15	SOT-23-5	-40°C to 125°C	Active
MIC5255-2.5YD5-TR	Microchip Technology	150mA	6V	150	TSOT-23-5	-40°C to 125°C	Active
MIC5255-2.5YM5-TR	Microchip Technology	150mA	6V	150	SOT-23-5	-40°C to 125°C	Active
MIC5301-2.5YD5-TR	Microchip Technology	150mA	5.5V	120	TSOT-23-5	-40°C to 125°C	Active
LDK130M25R	STMicroelectronics	300mA	5.5V	60	SOT-23-5	-40°C to 125°C	Active
RT9193-25GB	Richtek USA Inc.	300mA	5.5V	130	SOT-23-5	-40°C to 125°C	Active
RT9193-25GJ5	Richtek USA Inc.	300mA	5.5V	130	TSOT-23-5	-40°C to 125°C	Active
S-1137A25-M5T1U	ABLIC Inc.	300mA	5.5V	1	SOT-23-5	-40°C to 85°C	Obsolete

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalent): TPS79225DBVT is the direct parametric equivalent, differing only in packaging format (Tape & Reel vs. Cut Tape). Both parts maintain identical electrical performance and Last Time Buy status.

For Active Supply Chain Continuity: TPS7A2025PDBVR from Texas Instruments is recommended as the primary substitute. This part is Active status, offers higher output current (300mA), improved quiescent current (15 µA vs. 250 µA), extended temperature range (-40°C to 125°C), and maintains Texas Instruments manufacturing consistency. Input voltage tolerance increases to 6V.

For Extended Temperature Applications: LDK130M25R (STMicroelectronics) and MIC5255-2.5YM5-TR (Microchip Technology) both support -40°C to 125°C operating range with Active product status. LDK130M25R offers automotive-grade qualification (AEC-Q100) and lower quiescent current (60 µA). MIC5255-2.5YM5-TR provides standard industrial-grade performance with 150mA output current.

For Ultra-Low Quiescent Current: S-1137A25-M5T1U features exceptionally low quiescent current (1 µA) but carries Obsolete product status and should not be selected for new designs.

Avoid: S-1137A25-M5T1U (Obsolete status) and RT9193-25GB/RT9193-25GJ5 (MSL-3 moisture sensitivity vs. MSL-1 for original part) for applications requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can TPS7A2025PDBVR directly replace TPS79225DBVR in existing designs?

A: Yes, with design verification. Both parts deliver 2.5V fixed output in SOT-23-5 packages with identical pinout. The TPS7A2025PDBVR provides higher output current (300mA vs. 100mA), lower quiescent current (15 µA vs. 250 µA), and extended temperature range. Input voltage tolerance increases from 5.5V to 6V. Verify that the application does not depend on the original 250 µA quiescent current specification or the -40°C to 85°C temperature limit.

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 assembly. TSOT-23-5 is preferred for space-constrained applications. Verify PCB footprint compatibility before substitution.

Q: Are Microchip MIC5255 and MIC5301 parts interchangeable?

A: Both deliver 2.5V output at 150mA in SOT-23-5 packages. MIC5301-2.5YD5-TR features lower dropout voltage (0.1V @ 150mA vs. 0.25V) and lower quiescent current (120 µA vs. 150 µA), making it suitable for lower-input-voltage applications. MIC5255 variants support higher input voltage (6V vs. 5.5V). Select based on specific dropout and input voltage requirements.

Q: Why is LDK130M25R qualified as automotive-grade?

A: LDK130M25R carries AEC-Q100 automotive qualification, indicating compliance with automotive reliability and environmental stress testing standards. This qualification is relevant only for automotive applications. For non-automotive use, this qualification provides no functional advantage.

Q: Can I use a 300mA-rated part in place of a 100mA-rated part?

A: Yes, provided the application circuit does not depend on the original 100mA current limit specification. Higher-rated parts are backward-compatible for lower-current applications. Verify that protection thresholds and thermal performance remain acceptable for your specific load profile.

Q: What does Last Time Buy status mean for TPS79225DBVR?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part. Existing inventory may be available, but no new production is planned. For new designs or long-term production, select an Active-status substitute such as TPS7A2025PDBVR or LDK130M25R.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original TPS79225DBVR compliance status.

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