TPS79118DBVR Equivalent & Substitute Parts

Part Overview

The TPS79118DBVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 100mA in SOT-23-5 surface mount packaging. This device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 1.8V regulation in compact form factors.

Substiute Parts

TPS79118DBVR

Texas InstrumentsIn Stock: 7108TPS79118DBVR Datasheet

Current PartRFQ

TPS7A2018PDBVR

Texas InstrumentsIn Stock: 17373TPS7A2018PDBVR Datasheet

MFR RecommendedRFQ

TPS79118DBVT

Texas InstrumentsIn Stock: 3846TPS79118DBVT Datasheet

Parametric EquivalentRFQ

LDK130M18R

STMicroelectronicsIn Stock: 24516LDK130M18R 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

Substitution eligibility is determined by the following critical parameters:

• Output voltage matching at 1.8V fixed
• Package compatibility in SOT-23-5 form factor
• Output current capability equal to or greater than 100mA
• Input voltage maximum rating of 5.5V or higher
• Surface mount mounting type
• Enable control feature availability
• RoHS3 compliance

Substitute parts are grouped into two categories:

Category 1: Direct Parametric Equivalents — Parts with identical electrical specifications and packaging, differing only in packaging format (Cut Tape vs. Tape & Reel).

Category 2: Functional Substitutes — Parts with enhanced specifications (higher output current, lower quiescent current, improved temperature range) that maintain full backward compatibility while offering performance improvements or extended availability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): TPS79118DBVT is the parametric equivalent, differing only in packaging format (Tape & Reel vs. Cut Tape). Both parts are Last Time Buy status from Texas Instruments. Selection between these two depends on procurement and assembly requirements.

For Active Product Substitution (Enhanced Performance): TPS7A2018PDBVR, LDK130M18R, RT9193-18GB, and S-1137C18-M5T1U all provide 300mA output current capability, exceeding the 100mA requirement of the original part. These substitutes maintain 1.8V fixed output and SOT-23-5 packaging.

TPS7A2018PDBVR is recommended as the primary active substitute from Texas Instruments. It offers Active product status, extended operating temperature range (-40°C ~ 125°C), significantly reduced quiescent current (15 µA vs. 250 µA), and improved input voltage rating (6V vs. 5.5V). RoHS3 compliance is maintained.

LDK130M18R provides automotive-grade qualification (AEC-Q100) and is suitable for applications requiring automotive reliability standards. Extended temperature range and Active status support long-term availability.

RT9193-18GB offers the highest inventory availability and Active status with competitive quiescent current performance (130 µA).

S-1137C18-M5T1U carries Obsolete status and should be avoided for new designs despite its ultra-low quiescent current (1 µA) specification.

Frequently Asked Questions (FAQ)

Q: Can TPS7A2018PDBVR directly replace TPS79118DBVR in existing designs? A: Yes. Both devices provide 1.8V fixed output in SOT-23-5 packaging with identical pinout and control features. The higher output current capability (300mA vs. 100mA) and lower quiescent current of the TPS7A2018PDBVR make it a superior substitute. No circuit modifications are required.

Q: What is the difference between TPS79118DBVR and TPS79118DBVT? A: These parts are electrically identical. The difference is packaging format: DBVR is supplied in Cut Tape with Digi-Reel, while DBVT is supplied in Tape & Reel. Both are Last Time Buy status. Selection depends on assembly equipment compatibility and procurement preferences.

Q: Why is the LDK130M18R qualified for automotive applications? A: LDK130M18R carries AEC-Q100 automotive qualification, indicating it meets automotive reliability and quality standards. This qualification is relevant only if your application requires automotive-grade components.

Q: Is S-1137C18-M5T1U suitable for new designs? A: No. S-1137C18-M5T1U is classified as Obsolete. While it meets the electrical requirements, obsolete status indicates discontinued manufacturing and limited future availability. Active alternatives should be prioritized for new designs.

Q: What are the key differences in quiescent current among substitutes? A: Quiescent current varies significantly: TPS7A2018PDBVR (15 µA), LDK130M18R (60 µA), RT9193-18GB (130 µA), S-1137C18-M5T1U (1 µA), and TPS79118DBVR (250 µA). Lower quiescent current reduces standby power consumption. Selection depends on application power budget requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance, consistent with the original TPS79118DBVR specification.

Q: What is the maximum input voltage for each substitute? A: TPS7A2018PDBVR supports 6V maximum input, while TPS79118DBVR, LDK130M18R, RT9193-18GB, and S-1137C18-M5T1U all support 5.5V maximum input. Verify your input voltage range against the selected substitute.

Q: Can I use these substitutes in applications requiring -40°C ~ 125°C operating range? A: TPS7A2018PDBVR, LDK130M18R, and RT9193-18GB support -40°C ~ 125°C. TPS79118DBVR, TPS79118DBVT, and S-1137C18-M5T1U are limited to -40°C ~ 85°C. Verify your application temperature requirements before selection.