TPS79318DBVT Linear Voltage Regulator 1.8V 200mA Equivalent & Substitute Parts

Part Overview

The TPS79318DBVT is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 200mA in SOT-23-5 surface mount packaging. This device is classified as Last Time Buy, indicating limited availability of the original part number. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements.

Substiute Parts

TPS79318DBVT

Texas InstrumentsIn Stock: 2529TPS79318DBVT Datasheet

Current PartRFQ

TPS79318DBVR

Texas InstrumentsIn Stock: 35175TPS79318DBVR Datasheet

Parametric EquivalentRFQ

MIC5265-1.8YD5-TR

Microchip TechnologyIn Stock: 2643MIC5265-1.8YD5-TR Datasheet

MFR RecommendedRFQ

MIC5305-1.8YD5-TR

Microchip TechnologyIn Stock: 3714MIC5305-1.8YD5-TR Datasheet

MFR RecommendedRFQ

RT9193-18GB

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

MFR RecommendedRFQ

S-1137C18-M5T1U

ABLIC Inc.In Stock: 991S-1137C18-M5T1U Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS79318DBVT are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

• Fixed output voltage of 1.8V
• SOT-23-5 package (SC-74A, SOT-753, or TSOT-23-5 variants)
• Surface mount technology
• Positive output configuration
• Enable control feature
• Operating temperature range overlap with -40°C minimum
• RoHS3 compliance

Current Output Capacity Considerations: Substitute parts are classified by output current rating relative to the 200mA specification. Parts with equal or greater current capacity provide direct substitution. Parts with lower current capacity (150mA) are listed as alternatives where application current requirements do not exceed the substitute part's rating.

Packaging Variants: Substitutes include variations in tape & reel (TR), cut tape (CT), and Digi-Reel® packaging formats, which are mechanically and electrically equivalent but differ in supply format.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitute: TPS79318DBVR

The TPS79318DBVR is the direct parametric equivalent to the TPS79318DBVT. Both parts are manufactured by Texas Instruments with identical electrical specifications, output current rating of 200mA, and operating temperature range of -40°C to 150°C. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). This part is in Active product status with significantly higher inventory availability (35,100 units), ensuring supply continuity. RoHS3 compliance and identical protection features make this the optimal choice for direct replacement.

Alternative Substitutes for Current-Reduced Applications:

MIC5305-1.8YD5-TR and MIC5265-1.8YD5-TR from Microchip Technology are suitable where application current requirements do not exceed 150mA. Both maintain 1.8V output, SOT-23-5 package compatibility, and -40°C minimum operating temperature. MIC5265-1.8YD5-TR offers exceptionally low quiescent current (2 µA) for power-sensitive applications. Both are in Active status with RoHS3 compliance.

Higher Current Capacity Alternatives:

RT9193-18GB from Richtek USA Inc. provides 300mA output current capacity in SOT-23-5 package with 1.8V fixed output. This part is suitable for applications requiring higher current headroom. Operating temperature range is -40°C to 125°C. Active product status and RoHS3 compliance are confirmed.

Not Recommended:

S-1137C18-M5T1U from ABLIC Inc. is classified as Obsolete and should not be selected for new designs or long-term production. Operating temperature range is limited to -40°C to 85°C, which is narrower than the original part.

Frequently Asked Questions (FAQ)

Q: Can TPS79318DBVR directly replace TPS79318DBVT without circuit modification?

A: Yes. Both parts are parametrically identical with 1.8V output, 200mA current rating, identical quiescent current (220 µA), and matching protection features. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). No circuit changes are required.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: Both are physically compatible 5-pin surface mount packages with identical pin configurations and footprints. TSOT-23-5 denotes a thin variant. Parts in either package can be used interchangeably on the same PCB layout.

Q: Can I use MIC5305-1.8YD5-TR or MIC5265-1.8YD5-TR if my application only requires 150mA?

A: Yes, if your application current requirement does not exceed 150mA. Both Microchip parts are rated for 150mA output current and maintain 1.8V fixed output with identical input voltage range (5.5V max). Verify that your circuit current draw remains below 150mA under all operating conditions.

Q: Why is the operating temperature range different for some substitutes?

A: The original TPS79318DBVT operates to 150°C, while most substitutes are rated to 125°C. If your application requires operation above 125°C, only TPS79318DBVR maintains the full -40°C to 150°C range. For applications operating at or below 125°C, all listed substitutes are suitable.

Q: Is S-1137C18-M5T1U a viable substitute?

A: No. This part is classified as Obsolete and has a limited operating temperature range (-40°C to 85°C). It should not be selected for new designs or ongoing production.

Q: What is the advantage of RT9193-18GB over the original part?

A: RT9193-18GB provides 300mA output current capacity compared to the original 200mA rating. This allows for higher current applications or provides additional design margin. It maintains 1.8V output, SOT-23-5 package, and -40°C to 125°C operating range. All parts are RoHS3 compliant.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the compliance status of the original TPS79318DBVT.