TPS73101MDBVREP Equivalent & Substitute Parts

Part Overview

The TPS73101MDBVREP is an active linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This positive adjustable regulator delivers 150mA output current in a compact SOT-23-5 surface mount package. The device is currently in active production status with 3100 units in stock. Alternative parts may be required due to inventory constraints, application-specific current requirements, or supply chain considerations.

Substiute Parts

TPS73101MDBVREP

Texas InstrumentsIn Stock: 3143TPS73101MDBVREP Datasheet

Current PartRFQ

RT9043GB

Richtek USA Inc.In Stock: 55314RT9043GB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS73101MDBVREP is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the SOT-23-5 package (SC-74A, SOT-753) to ensure mechanical and electrical pin compatibility on the PCB.

Output Configuration: The substitute must maintain positive adjustable output configuration with a single regulator output.

Voltage Range Compatibility: Input maximum voltage must be 5.5V or greater. Output voltage range must encompass the required application voltage (minimum 1.2V, maximum 5.5V or lower depending on application needs).

Current Rating: The substitute's output current rating must meet or exceed the application's maximum current demand. The TPS73101MDBVREP provides 150mA; substitutes with higher current ratings are acceptable if other parameters align.

Regulatory Compliance: Both parts must maintain ROHS3 compliance and active product status to ensure long-term availability and regulatory alignment.

The RT9043GB qualifies as a substitute based on these criteria: identical package, matching output configuration, compatible voltage ranges, higher current capability (400mA), and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

TPS73101MDBVREP is the primary choice when:

• Extended operating temperature range (-55°C to 125°C) is required
• Lower dropout voltage (0.1V @ 150mA) is critical for low-input-voltage applications
• Output current demand does not exceed 150mA
• Texas Instruments supply chain preference exists

RT9043GB is an acceptable substitute when:

• Output current requirement exceeds 150mA but does not exceed 400mA
• Operating temperature range of -40°C to 85°C is acceptable
• Higher dropout voltage (0.35V @ 400mA) does not impact circuit performance
• Richtek supply chain availability is preferred or TPS73101MDBVREP inventory is unavailable
• Maximum output voltage of 5V (versus 5.5V) meets application requirements

Both parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment and long-term component availability.

Frequently Asked Questions (FAQ)

Q: Can RT9043GB replace TPS73101MDBVREP in all applications?

A: RT9043GB is mechanically and electrically compatible in SOT-23-5 package applications requiring positive adjustable regulation. However, verify that your application tolerates the higher dropout voltage (0.35V versus 0.1V) and the reduced maximum output voltage (5V versus 5.5V). If your circuit operates at the upper voltage limits or requires minimal dropout, TPS73101MDBVREP is the appropriate choice.

Q: What is the impact of different dropout voltages?

A: Dropout voltage determines the minimum input-to-output voltage differential required for proper regulation. TPS73101MDBVREP requires 0.1V headroom at 150mA, while RT9043GB requires 0.35V headroom at 400mA. In low-input-voltage applications, the lower dropout of TPS73101MDBVREP may be necessary to maintain regulation.

Q: Are the packages physically identical?

A: Yes. Both parts use the SC-74A / SOT-753 package designation, which is the SOT-23-5 footprint. PCB layout and component placement are directly compatible without modification.

Q: What are the temperature operating range differences?

A: TPS73101MDBVREP operates from -55°C to 125°C, while RT9043GB operates from -40°C to 85°C. If your application requires operation below -40°C or above 85°C, TPS73101MDBVREP is required.

Q: Can I use RT9043GB if my circuit only needs 150mA?

A: Yes. RT9043GB's 400mA rating exceeds the 150mA requirement and will function correctly. The higher current capability does not negatively impact lower-current applications.