TPS73218DBVT Equivalent & Substitute Parts

Part Overview

The TPS73218DBVT 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 device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring 1.8V regulation with comparable electrical performance and package compatibility.

Substiute Parts

TPS73218DBVT

Texas InstrumentsIn Stock: 7060TPS73218DBVT Datasheet

Current PartRFQ

TPS73218DBVR

Texas InstrumentsIn Stock: 20225TPS73218DBVR 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

MIC5319-1.8YD5-TR

Microchip TechnologyIn Stock: 1793MIC5319-1.8YD5-TR Datasheet

MFR RecommendedRFQ

RT9193-18GB

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Electrical Compatibility Requirements:

• Fixed output voltage of 1.8V
• Input voltage maximum of 5.5V or greater
• Operating temperature range of -40°C to 125°C
• Surface mount package (SOT-23-5 or TSOT-23-5)
• Enable control feature
• Over temperature protection as minimum

Substitution Categories:

Category 1: Direct Parametric Equivalent TPS73218DBVR matches all electrical specifications and differs only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). This part is functionally identical with Active product status.

Category 2: Functional Equivalents with Output Current Variance MIC5265-1.8YD5-TR, MIC5305-1.8YD5-TR, and RT9193-18GB provide 1.8V fixed output regulation with SOT-23-5 package compatibility. These parts differ in output current ratings (150mA, 150mA, and 300mA respectively) and quiescent current specifications, suitable for applications where the TPS73218DBVT's 250mA output is not fully utilized.

Category 3: Higher Output Current Alternative MIC5319-1.8YD5-TR delivers 500mA output current, exceeding the TPS73218DBVT specification. This part is applicable for designs requiring higher current capacity while maintaining 1.8V output and SOT-23-5 package form factor.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended for New Designs): TPS73218DBVR is the primary substitute. It maintains identical electrical specifications and Active product status, ensuring long-term availability and supply chain stability. The packaging difference (Cut Tape & Digi-Reel® versus Tape & Reel) does not affect electrical performance or PCB assembly compatibility.

For Current-Constrained Applications: MIC5265-1.8YD5-TR, MIC5305-1.8YD5-TR, and RT9193-18GB are suitable when application current requirements are 150mA or less. These alternatives offer Active product status and ROHS3 compliance. RT9193-18GB provides 300mA capacity, bridging the gap between lower-current Microchip options and the original 250mA specification.

For Higher Current Requirements: MIC5319-1.8YD5-TR accommodates designs requiring up to 500mA output current while maintaining 1.8V regulation and SOT-23-5 package compatibility. This part is appropriate for applications where future current scaling is anticipated.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and operate across the -40°C to 125°C temperature range. All parts include Enable control and over temperature protection as specified for the original device.

Frequently Asked Questions (FAQ)

Q: Can TPS73218DBVR be used as a direct replacement for TPS73218DBVT? A: Yes. TPS73218DBVR is electrically identical to TPS73218DBVT with matching output voltage, current rating, dropout voltage, and quiescent current specifications. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect circuit performance or PCB assembly.

Q: What is the key difference between the Microchip MIC5265, MIC5305, and MIC5319 options? A: All three Microchip parts deliver 1.8V output in TSOT-23-5 packages. MIC5265 and MIC5305 are rated for 150mA output current, while MIC5319 supports 500mA. Quiescent current varies: MIC5265 at 2 µA, MIC5305 at 150 µA, and MIC5319 at 150 µA. Selection depends on application current requirements and power consumption priorities.

Q: Is RT9193-18GB compatible with the TPS73218DBVT footprint? A: Yes. RT9193-18GB uses the SOT-23-5 package (SC-74A), matching the TPS73218DBVT pinout and PCB footprint. The 300mA output current rating exceeds the original 250mA specification, providing design margin for current-sensitive applications.

Q: What are the package differences between SOT-23-5 and TSOT-23-5? A: Both packages are physically compatible with identical pinouts and footprints. TSOT-23-5 denotes a thin variant with reduced height. This difference does not affect electrical performance or assembly compatibility on standard PCBs.

Q: Why do some substitute parts have unspecified dropout voltage? A: Dropout voltage specifications are provided by manufacturers based on characterization data. Unspecified values indicate the manufacturer did not publish this parameter in the datasheet. For critical applications, refer to the complete datasheet or contact the manufacturer for this specification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the original TPS73218DBVT.