TPS7A0331PDBVR Equivalent & Substitute Parts

Part Overview

The TPS7A0331PDBVR is a linear voltage regulator IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 3.1V at 200mA in a surface-mount SOT-23-5 package. The regulator features integrated protection mechanisms including over-current, over-temperature, and under-voltage lockout (UVLO) protection, with an enable control feature for power management applications.

The TPS7A0331PDBVR maintains active product status with 2503 units currently in stock. Substitute parts are identified based on electrical parameter compatibility, mechanical packaging equivalence, and compliance certifications. Alternative models are necessary when addressing supply chain constraints, inventory availability, or specific performance requirements within the defined electrical operating envelope.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	3.1V	V
Output Current	200	mA
Input Voltage (Maximum)	6	V
Dropout Voltage @ 200mA	0.36	V
Quiescent Current	300	nA
PSRR @ 1kHz	55	dB
Operating Temperature Range	-40 to 125	°C
Package Type	SOT-23-5 (SC-74A)	—
Mounting Type	Surface Mount	—
Protection Features	Over Current, Over Temperature, UVLO	—

Substitute Part Grouping Explanation

Substitute parts for the TPS7A0331PDBVR are identified as parametric equivalents within the TPS7A series from Texas Instruments. Substitution eligibility is determined by the following critical parameters:

Output Specifications: Fixed positive output voltage of 3.1V and output current rating of 200mA must remain constant across all substitute parts.

Package and Mounting: All substitute parts must utilize the SOT-23-5 (SC-74A) surface-mount package to ensure mechanical and electrical compatibility with existing PCB designs.

Protection and Control Features: Over-current, over-temperature, and under-voltage lockout protection, along with enable control functionality, must be present in substitute devices.

Operating Temperature Range: The -40°C to 125°C junction temperature range must be maintained.

Compliance Standards: RoHS3 compliance, MSL Level 1, and REACH unaffected status are required for substitute parts.

Input Voltage Tolerance: Substitute parts operate within a reduced maximum input voltage specification (5.5V versus 6V in the main part), which represents a more conservative operating envelope and does not restrict substitution in applications designed for the original part.

Performance Characteristics: Variations in dropout voltage and quiescent current between the main part and substitutes reflect design improvements in the TPS7A0531 series but do not prevent functional equivalence.

Parameter Comparison

Parameter	TPS7A0331PDBVR	TPS7A0531PDBVR	TPS7A0531PDBVT	Unit
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	—
Output Voltage (Fixed)	3.1	3.1	3.1	V
Output Current	200	200	200	mA
Input Voltage (Maximum)	6	5.5	5.5	V
Dropout Voltage @ 200mA	0.36	0.308	0.308	V
Quiescent Current	300	3	3	nA
PSRR	55 @ 1kHz	40 @ 1kHz–1MHz	40 @ 1kHz–1MHz	dB
Operating Temperature	-40 to 125	-40 to 125	-40 to 125	°C
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	—
Mounting Type	Surface Mount	Surface Mount	Surface Mount	—
Protection Features	Over Current, Over Temperature, UVLO	Over Current, Over Temperature, UVLO	Over Current, Over Temperature, UVLO	—
Control Features	Enable	Enable	Enable	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	—
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	—
Product Status	Active	Active	Active	—

Engineering Selection Recommendations

All three parts—TPS7A0331PDBVR, TPS7A0531PDBVR, and TPS7A0531PDBVT—maintain active product status with full RoHS3 compliance and REACH unaffected certification. These regulatory and compliance attributes ensure long-term availability and suitability for regulated applications.

The TPS7A0531 series (both PDBVR and PDBVT variants) represents an improved design iteration within the TPS7A family, offering reduced dropout voltage (0.308V versus 0.36V) and significantly lower quiescent current (3 µA versus 300 nA). These performance enhancements result in improved power efficiency and thermal characteristics, particularly in battery-powered or low-power applications.

The primary distinction between TPS7A0531PDBVR and TPS7A0531PDBVT lies in packaging tape configuration and reel specifications, not electrical performance. Both variants are electrically identical and mechanically compatible with the same PCB footprint.

Selection between the main part and substitutes should be based on application requirements for input voltage tolerance (6V maximum for TPS7A0331PDBVR versus 5.5V for TPS7A0531 variants) and power efficiency priorities. Applications operating at input voltages exceeding 5.5V require the TPS7A0331PDBVR. Applications prioritizing minimal quiescent current consumption and reduced thermal dissipation benefit from TPS7A0531 selection.

Frequently Asked Questions (FAQ)

Q: Can TPS7A0531PDBVR be used as a direct replacement for TPS7A0331PDBVR?

A: Yes, within applications where the input voltage does not exceed 5.5V. The TPS7A0531PDBVR is electrically and mechanically compatible, with identical output voltage, current rating, package type, and protection features. The reduced maximum input voltage specification (5.5V versus 6V) represents the primary constraint for direct substitution.

Q: What is the difference between TPS7A0531PDBVR and TPS7A0531PDBVT?

A: Both parts are electrically identical with identical electrical specifications. The difference is in packaging tape configuration and reel specifications. Selection between these variants depends on manufacturing equipment compatibility and tape reel handling requirements. Both are suitable for the same PCB applications.

Q: Does the lower quiescent current of TPS7A0531 affect circuit functionality?

A: No. The quiescent current specification (300 nA for TPS7A0331PDBVR versus 3 µA for TPS7A0531 variants) describes the regulator's internal current consumption when delivering output current. Lower quiescent current improves overall system power efficiency and reduces thermal dissipation but does not alter the regulator's functional output characteristics or protection behavior.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts utilize the identical SOT-23-5 (SC-74A) surface-mount package with the same pinout, footprint, and mechanical dimensions. PCB designs require no modification when substituting between these parts.

Q: What compliance certifications apply to all substitute parts?

A: All parts maintain RoHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and REACH unaffected status. These certifications ensure regulatory compliance for industrial, consumer, and automotive applications within the specified operating temperature range.

Q: Is the reduced PSRR specification of TPS7A0531 a limitation?

A: The PSRR (Power Supply Rejection Ratio) specification differs between parts: TPS7A0331PDBVR specifies 55 dB at 1 kHz, while TPS7A0531 variants specify 40 dB across 1 kHz to 1 MHz. The TPS7A0531 specification covers a broader frequency range. Selection depends on application requirements for noise rejection at specific frequencies. Both values are within typical performance ranges for linear regulators in this class.

Q: Can these parts be used interchangeably in existing production?

A: Substitution is permissible when input voltage specifications align with application requirements. Verify that the application's maximum input voltage does not exceed 5.5V when using TPS7A0531 variants. No circuit redesign is required; parts are pin-compatible and functionally equivalent within their specified operating envelopes.

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