TPS73218DBVRG4 Equivalent & Substitute Parts

Part Overview

The TPS73218DBVRG4 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 1.8V output at 250mA in a SOT-23-5 surface mount package. This part is classified as discontinued at DiGi Electronics, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity. The device provides positive fixed output regulation with integrated protection features including over-current, over-temperature, short-circuit, and reverse-polarity protection.

Substiute Parts

TPS73218DBVRG4

Texas InstrumentsIn Stock: 10699TPS73218DBVRG4 Datasheet

Current PartRFQ

TPS73218DBVR

Texas InstrumentsIn Stock: 20225TPS73218DBVR Datasheet

MFR RecommendedRFQ

TPS73218DBVT

Texas InstrumentsIn Stock: 7060TPS73218DBVT Datasheet

Parametric EquivalentRFQ

RT9193-18GB

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS73218DBVRG4 is determined by the following critical parameters: fixed output voltage of 1.8V, output current capability of at least 250mA, maximum input voltage of 5.5V, SOT-23-5 package compatibility, and surface mount mounting type. Parts meeting these core electrical and mechanical specifications are classified as direct substitutes.

The substitute parts identified fall into two categories:

Texas Instruments TPS732xx Series (Packaging Variants): TPS73218DBVR and TPS73218DBVT are identical electrical equivalents differing only in packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Both maintain the same electrical performance and protection feature set.

Cross-Manufacturer Equivalent: RT9193-18GB from Richtek USA Inc. provides equivalent output voltage and package configuration with enhanced current output capability (300mA versus 250mA) and superior PSRR performance (70dB ~ 50dB versus 58dB ~ 37dB).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TPS73218DBVR is the preferred substitute. It is an active product from Texas Instruments with identical electrical specifications and protection features to the discontinued TPS73218DBVRG4. The only difference is packaging format (Cut Tape & Digi-Reel versus the original Digi-Reel format), which does not affect electrical performance or PCB integration. This part maintains full design compatibility and is currently in active production with substantial inventory availability.

Secondary Recommendation: TPS73218DBVT provides parametric equivalence with identical electrical performance but is classified as Last Time Buy, indicating limited future availability. This option is suitable only for applications where immediate procurement is possible and long-term supply is not critical.

Alternative Recommendation: RT9193-18GB from Richtek USA Inc. is an active cross-manufacturer equivalent suitable for applications where the enhanced specifications are beneficial or where Texas Instruments parts face supply constraints. This device offers higher output current capability (300mA), significantly lower quiescent current (130 µA versus 550 µA), and superior PSRR performance. All parts maintain ROHS3 compliance and identical operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can TPS73218DBVR be used as a direct replacement for TPS73218DBVRG4?

A: Yes. TPS73218DBVR is electrically identical to TPS73218DBVRG4 with matching output voltage, current rating, input voltage range, dropout voltage, quiescent current, PSRR, protection features, and operating temperature range. The only difference is packaging format (Cut Tape & Digi-Reel versus Digi-Reel), which does not affect circuit performance or PCB layout.

Q: What is the difference between TPS73218DBVR and TPS73218DBVT?

A: Both parts are electrically identical with the same output voltage, current rating, and performance specifications. The difference is packaging format: TPS73218DBVR is supplied in Cut Tape & Digi-Reel format, while TPS73218DBVT is supplied in Tape & Reel format. TPS73218DBVR is currently active, while TPS73218DBVT is Last Time Buy status.

Q: Is RT9193-18GB compatible with designs using TPS73218DBVRG4?

A: RT9193-18GB is mechanically and electrically compatible for the same output voltage (1.8V) and package (SOT-23-5). However, it differs in quiescent current (130 µA versus 550 µA) and PSRR performance (70dB ~ 50dB versus 58dB ~ 37dB). Designs with tight power budget or noise-sensitive applications may benefit from these enhanced specifications. Verify that the higher current capability (300mA versus 250mA) does not introduce thermal or layout changes.

Q: Why is TPS73218DBVRG4 discontinued?

A: Product discontinuation is determined by manufacturer lifecycle decisions. TPS73218DBVR remains in active production as the current equivalent, providing continuity for the TPS732xx series.

Q: Are all substitute parts RoHS compliant?

A: Yes. TPS73218DBVR, TPS73218DBVT, and RT9193-18GB are all ROHS3 compliant, matching the compliance status of the original TPS73218DBVRG4.

Q: What is the MSL (Moisture Sensitivity Level) difference between TPS73218DBVRG4 and RT9193-18GB?

A: TPS73218DBVRG4 has MSL 1 (Unlimited), while RT9193-18GB has MSL 3 (168 Hours). This indicates RT9193-18GB requires moisture control during storage and handling. Verify storage and handling procedures align with MSL 3 requirements for your manufacturing environment.