TPS73615MDBVREP Equivalent & Substitute Parts

Part Overview

The TPS73615MDBVREP is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed output applications. This SOT-23-5 surface mount device delivers 400mA at a fixed 1.5V output with a maximum dropout voltage of 0.2V at full load. The part is actively produced and widely stocked, with 3796 units available in inventory. Alternative equivalent parts may be required due to supply constraints, design optimization for specific quiescent current requirements, or output current capacity adjustments in system redesigns.

Substiute Parts

TPS73615MDBVREP

Texas InstrumentsIn Stock: 3878TPS73615MDBVREP Datasheet

Current PartRFQ

RT9020-18GB

Richtek USA Inc.In Stock: 3244RT9020-18GB Datasheet

MFR RecommendedRFQ

RT9193-15GB

Richtek USA Inc.In Stock: 103462RT9193-15GB Datasheet

MFR RecommendedRFQ

RT9193-18GB

Richtek USA Inc.In Stock: 105364RT9193-18GB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS73615MDBVREP is determined by the following critical parameters:

Primary Substitution Criteria:

• Output voltage matching: 1.5V fixed output
• Package compatibility: SOT-23-5 form factor
• Output current capacity: minimum 400mA
• Input voltage range: maximum 5.5V
• Surface mount mounting type
• Positive output configuration

Secondary Compatibility Factors:

• Operating temperature range (minimum -40°C, maximum 125°C acceptable)
• Protection features (Over Current and Over Temperature required)
• RoHS3 compliance
• Active product status

The substitute parts identified are grouped by output voltage specification. RT9193-15GB matches the 1.5V output requirement with reduced current capacity (300mA), suitable for applications with lower current demands. RT9020-18GB and RT9193-18GB provide 1.8V output variants, applicable only when the system design permits higher output voltage tolerance.

Parameter Comparison

Engineering Selection Recommendations

RT9193-15GB (1.5V Output, 300mA): This part provides exact voltage matching with the TPS73615MDBVREP and maintains the full operating temperature range (-40°C ~ 125°C). Selection is appropriate for applications where output current requirements do not exceed 300mA. The reduced quiescent current (130 µA versus 550 µA) offers improved power efficiency in battery-powered or low-power standby applications. All regulatory compliance requirements (ROHS3, REACH Unaffected) are met.

RT9020-18GB (1.8V Output, 500mA): This part is suitable only when the system design accommodates a 0.3V higher output voltage. The increased output current capacity (500mA) exceeds the TPS73615MDBVREP specification. The narrower operating temperature range (-40°C ~ 85°C) restricts use in applications requiring extended low-temperature operation below -40°C. Quiescent current is significantly lower (50 µA), beneficial for efficiency-critical designs.

RT9193-18GB (1.8V Output, 300mA): This variant combines the 1.8V output voltage with 300mA current capacity. Like RT9020-18GB, it requires system tolerance for higher output voltage. The full temperature range support (-40°C ~ 125°C) matches the original part. Selection is limited to applications where voltage tolerance and current requirements align with these specifications.

Frequently Asked Questions (FAQ)

Q: Can RT9193-15GB directly replace TPS73615MDBVREP in all applications?

A: RT9193-15GB provides direct voltage and package compatibility. However, the output current capacity is reduced from 400mA to 300mA. Replacement is valid only if the application's maximum load current does not exceed 300mA. Verify actual circuit current draw before substitution.

Q: What is the impact of using RT9020-18GB or RT9193-18GB instead of the original 1.5V part?

A: These 1.8V variants introduce a 0.3V voltage increase at the regulator output. Downstream circuits must tolerate this higher voltage. Many digital and analog components accept 1.8V as a valid supply voltage, but verification against component datasheets is necessary. These parts are not interchangeable without circuit-level evaluation.

Q: Why does RT9020-18GB have significantly lower quiescent current than the TPS73615MDBVREP?

A: Quiescent current differences reflect different internal circuit designs and process technologies between manufacturers. RT9020-18GB's 50 µA quiescent current versus TPS73615MDBVREP's 550 µA represents a design optimization for low-power applications. This difference becomes significant in battery-powered systems or applications with extended idle periods.

Q: Are all substitute parts available in the same packaging format?

A: Yes, all listed substitute parts use the SOT-23-5 package (SC-74A, SOT-753). PCB footprints and land patterns are identical, allowing direct physical replacement without layout modifications. Packaging format (Cut Tape & Digi-Reel versus Tape & Reel) affects procurement and handling but not electrical or mechanical compatibility.

Q: Do the substitute parts maintain the same protection features as the original?

A: RT9193-15GB, RT9020-18GB, and RT9193-18GB all include Over Current and Over Temperature protection. The TPS73615MDBVREP includes an additional Reverse Polarity protection feature. If reverse polarity protection is critical to the application, this difference must be addressed through external circuit design.

Q: What is the temperature range limitation for RT9020-18GB?

A: RT9020-18GB operates from -40°C to 85°C, which is narrower than the TPS73615MDBVREP range of -55°C to 125°C. This part is unsuitable for applications requiring operation below -40°C or above 85°C. RT9193-15GB and RT9193-18GB support the full -40°C to 125°C range.