TPS70939DBVR Equivalent & Substitute Parts

Part Overview

The TPS70939DBVR is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive output of 3.9V at 150mA in a compact SOT-23-5 surface mount package. The device is designed for applications requiring low-dropout regulation with integrated protection features including over-current, over-temperature, reverse-current, and under-voltage lockout (UVLO) protection. The part is currently in active production status with 5515 units available in inventory. Substitute parts are identified when packaging format differs while all critical electrical parameters remain identical, enabling flexible procurement and supply chain optimization.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.9V
Output Current	150mA
Input Voltage (Max)	30V
Dropout Voltage (Max)	1.4V @ 150mA
Quiescent Current	2.05 µA
Operating Temperature Range	-40°C to 125°C
Package Type	SOT-23-5 (SC-74A, SOT-753)
Protection Features	Over Current, Over Temperature, Reverse Current, UVLO
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TPS70939DBVR is determined by equivalence across the following critical parameters:

Output voltage specification (3.9V fixed)
Output current capability (150mA)
Maximum input voltage rating (30V)
Dropout voltage performance (1.4V @ 150mA)
Quiescent current characteristics (2.05 µA)
Operating temperature range (-40°C to 125°C)
Package footprint (SOT-23-5)
Protection feature set (Over Current, Over Temperature, Reverse Current, UVLO)
Regulatory compliance (ROHS3, REACH Unaffected)

The TPS70939DBVT qualifies as a parametric equivalent substitute. The sole difference between these parts is the packaging format: the main part (TPS70939DBVR) is supplied in Cut Tape (CT) & Digi-Reel® format, while the substitute (TPS70939DBVT) is supplied in Tape & Reel (TR) format. All electrical characteristics, performance specifications, and functional capabilities are identical.

Parameter Comparison

Parameter	TPS70939DBVR	TPS70939DBVT
Manufacturer	Texas Instruments	Texas Instruments
Category	Power Management (PMIC)	Power Management (PMIC)
Output Voltage (Fixed)	3.9V	3.9V
Output Current	150mA	150mA
Input Voltage (Max)	30V	30V
Dropout Voltage (Max)	1.4V @ 150mA	1.4V @ 150mA
Quiescent Current	2.05 µA	2.05 µA
Supply Current (Max)	350 µA	350 µA
PSRR	80dB ~ 52dB (10Hz ~ 1kHz)	80dB ~ 52dB (10Hz ~ 1kHz)
Control Features	Enable	Enable
Protection Features	Over Current, Over Temperature, Reverse Current, UVLO	Over Current, Over Temperature, Reverse Current, UVLO
Operating Temperature	-40°C to 125°C	-40°C to 125°C
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both the TPS70939DBVR and TPS70939DBVT are active production parts from Texas Instruments with identical electrical specifications and performance characteristics. Selection between these parts should be based on procurement requirements and supply chain logistics:

The TPS70939DBVR in Cut Tape & Digi-Reel® format is suitable for applications requiring smaller order quantities or mixed component procurement.

The TPS70939DBVT in Tape & Reel format is optimized for high-volume manufacturing environments and automated assembly processes.

Both parts maintain full ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across global markets. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can TPS70939DBVT be used as a direct replacement for TPS70939DBVR?

A: Yes. Both parts are electrically and functionally identical. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Direct substitution is valid for any application where the TPS70939DBVR is specified, provided the receiving equipment can accommodate the alternative packaging format.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) & Digi-Reel® format provides individual component strips suitable for manual assembly or small-batch operations. Tape & Reel (TR) format supplies components on continuous reels optimized for automated pick-and-place assembly systems in high-volume manufacturing.

Q: Are there any electrical performance differences between these substitute parts?

A: No. Both parts deliver identical output voltage (3.9V), output current (150mA), dropout voltage (1.4V @ 150mA), quiescent current (2.05 µA), and all other electrical specifications. Performance is equivalent across the full operating temperature range (-40°C to 125°C).

Q: Do both parts support the same protection features?

A: Yes. Both the TPS70939DBVR and TPS70939DBVT include identical protection: over-current, over-temperature, reverse-current, and under-voltage lockout (UVLO).

Q: What is the MSL rating and does it affect substitution?

A: Both parts have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints. This rating is identical for both variants and does not impact substitution decisions.

Q: Are both parts RoHS compliant?

A: Yes. Both the TPS70939DBVR and TPS70939DBVT are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for global distribution.

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