TPS73218MDBVREP Equivalent & Substitute Parts

Part Overview

The TPS73218MDBVREP is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) device. It delivers a fixed 1.8V output at 250mA with a maximum dropout voltage of 0.15V, housed in a SOT-23-5 surface mount package. The device is Active in product status and widely used in applications requiring low-noise, low-dropout regulation for 1.8V rail distribution. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

TPS73218MDBVREP

Texas InstrumentsIn Stock: 841TPS73218MDBVREP Datasheet

Current PartRFQ

RT9193-18GB

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS73218MDBVREP is determined by the following critical parameters:

• Output Voltage Match: Fixed 1.8V output is mandatory
• Package Compatibility: SOT-23-5 (SC-74A) surface mount package required
• Output Current Capability: Minimum 250mA to meet or exceed the original specification
• Input Voltage Range: Maximum input voltage of 5.5V or greater
• Control Features: Enable function required
• Protection Features: Over Current and Over Temperature protection required
• Compliance: ROHS3 compliance and Active product status

The RT9193-18GB meets all substitution criteria with equivalent output voltage, identical package type, higher output current capability (300mA), matching input voltage rating, and required protection features.

Parameter Comparison

Engineering Selection Recommendations

Both the TPS73218MDBVREP and RT9193-18GB are Active products with ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for current applications. The RT9193-18GB provides higher output current capability (300mA versus 250mA), lower quiescent current (130 µA versus 550 µA), and superior PSRR performance (70dB ~ 50dB versus 58dB ~ 37dB). The TPS73218MDBVREP offers extended operating temperature range (-55°C to 125°C versus -40°C to 125°C) and additional protection features including Short Circuit and Reverse Polarity protection. Selection between these parts depends on application-specific requirements for temperature range, quiescent current efficiency, and noise performance.

Frequently Asked Questions (FAQ)

Q: Can the RT9193-18GB directly replace the TPS73218MDBVREP in existing designs?

A: Yes, provided the application does not require the extended -55°C lower temperature limit or the additional Short Circuit and Reverse Polarity protection features. Both devices share identical output voltage (1.8V), input voltage rating (5.5V max), package type (SOT-23-5), and control/protection architecture.

Q: What are the key differences between these two regulators?

A: The RT9193-18GB offers higher output current (300mA versus 250mA), significantly lower quiescent current (130 µA versus 550 µA), and better PSRR performance. The TPS73218MDBVREP provides wider operating temperature range and additional protection against short circuit and reverse polarity conditions.

Q: Are both parts available in the same package?

A: Yes. Both the TPS73218MDBVREP and RT9193-18GB use the SOT-23-5 (SC-74A) surface mount package, ensuring mechanical and electrical pin compatibility.

Q: Which part should be selected for low-power applications?

A: The RT9193-18GB is preferred for applications prioritizing low quiescent current consumption, with 130 µA versus 550 µA for the TPS73218MDBVREP.

Q: Are there temperature range limitations when substituting?

A: The RT9193-18GB operates from -40°C to 125°C, while the TPS73218MDBVREP operates from -55°C to 125°C. Applications requiring operation below -40°C must use the TPS73218MDBVREP.

Q: Do both parts meet current compliance standards?

A: Yes. Both devices are ROHS3 compliant, REACH Unaffected, and carry Active product status, meeting current regulatory and supply chain requirements.