TPS79118DBVREP Linear Voltage Regulator 1.8V 100mA

Part Overview

The TPS79118DBVREP is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 100mA in a SOT-23-5 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device integrates protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) protection, with an enable control feature for flexible power management applications.

Substiute Parts

TPS79118DBVREP

Texas InstrumentsIn Stock: 1071TPS79118DBVREP Datasheet

Current PartRFQ

TPS79118DBVR

Texas InstrumentsIn Stock: 7108TPS79118DBVR Datasheet

MFR RecommendedRFQ

TPS79118DBVT

Texas InstrumentsIn Stock: 3846TPS79118DBVT Datasheet

MFR RecommendedRFQ

TPS79118DBVRQ1

Texas InstrumentsIn Stock: 4047TPS79118DBVRQ1 Datasheet

Parametric EquivalentRFQ

RT9193-18GB

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TPS79118DBVREP is determined by the following critical parameters: fixed 1.8V output voltage, SOT-23-5 package compatibility, positive output configuration, enable control feature, and protection feature set (over-current, over-temperature, reverse polarity, UVLO). The substitute parts are grouped into two categories based on output current capability and product status:

Category 1: Direct Equivalents (100mA Output) Parts TPS79118DBVR, TPS79118DBVT, and TPS79118DBVRQ1 maintain identical output current (100mA), voltage regulation (1.8V fixed), package format (SOT-23-5), and protection features. These differ only in packaging format (Cut Tape, Tape & Reel, or automotive-qualified) and product status (Last Time Buy or Automotive AEC-Q100 qualified).

Category 2: Parametric Equivalent (300mA Output) Part RT9193-18GB from Richtek USA Inc. provides the same 1.8V fixed output and SOT-23-5 package but with higher output current capability (300mA versus 100mA). This part is suitable for applications requiring greater current delivery while maintaining the same voltage regulation and package footprint.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using TPS79118DBVREP with 100mA output current requirements, TPS79118DBVR or TPS79118DBVT provide direct functional equivalence with identical electrical specifications. Both parts maintain Last Time Buy status from Texas Instruments, ensuring continued availability during transition periods. TPS79118DBVR is supplied in Cut Tape and Digi-Reel packaging, while TPS79118DBVT is supplied in Tape & Reel format.

For automotive applications or designs requiring extended temperature operation to 125°C with AEC-Q100 qualification, TPS79118DBVRQ1 is the appropriate selection. This part maintains identical output current and voltage specifications while providing automotive-grade reliability certification.

RT9193-18GB from Richtek USA Inc. is an active product suitable for applications where higher output current (300mA) is beneficial within the same SOT-23-5 package footprint. This part offers lower quiescent current (130 µA versus 250 µA) and active product status, providing long-term availability assurance. PSRR performance differs slightly (70dB ~ 50dB at 100Hz ~ 10kHz versus 80dB ~ 45dB at 100Hz ~ 100kHz), which may impact noise-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can TPS79118DBVR directly replace TPS79118DBVREP in existing designs? A: Yes. TPS79118DBVR provides identical electrical specifications including 1.8V fixed output, 100mA output current, 5.5V maximum input voltage, and SOT-23-5 package compatibility. The primary difference is packaging format (Cut Tape & Digi-Reel versus the original format) and product status (Last Time Buy). No circuit modifications are required.

Q: What is the difference between TPS79118DBVR and TPS79118DBVT? A: Both parts are electrically identical with 1.8V output and 100mA current rating. The difference is packaging: TPS79118DBVR is supplied in Cut Tape and Digi-Reel format, while TPS79118DBVT is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: When should TPS79118DBVRQ1 be selected instead of TPS79118DBVR? A: TPS79118DBVRQ1 should be selected for automotive applications requiring AEC-Q100 qualification or designs operating across the full -40°C to 125°C temperature range. TPS79118DBVR is rated to -40°C to 85°C maximum.

Q: Is RT9193-18GB a suitable replacement for 100mA applications? A: RT9193-18GB is functionally compatible with identical 1.8V output and SOT-23-5 package. However, it is rated for 300mA output current, which exceeds the 100mA requirement of the original design. This part is suitable if higher current capability is acceptable. The lower quiescent current (130 µA) may provide power efficiency benefits. PSRR performance differs slightly and should be evaluated for noise-sensitive applications.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed (TPS79118DBVR, TPS79118DBVT, TPS79118DBVRQ1, and RT9193-18GB) are ROHS3 compliant.

Q: What is the inventory status of these substitute parts? A: TPS79118DBVR has 7,080 units in stock, TPS79118DBVT has 3,822 units, TPS79118DBVRQ1 has 4,000 units, and RT9193-18GB has 105,300 units in stock. RT9193-18GB, being an active product, offers the highest inventory availability.