TPS73533DRVR Equivalent & Substitute Parts

Part Overview

The TPS73533DRVR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications. This Surface Mount device delivers 500mA output current in a compact 6-WSON (2x2) package with integrated protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring regulated 3.3V power distribution. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

TPS73533DRVR

Texas InstrumentsIn Stock: 16278TPS73533DRVR Datasheet

Current PartRFQ

TPS73533DRVT

Texas InstrumentsIn Stock: 1965TPS73533DRVT Datasheet

Parametric EquivalentRFQ

LD39050PU33R

STMicroelectronicsIn Stock: 8613LD39050PU33R Datasheet

MFR RecommendedRFQ

RT2517AGQV

Richtek USA Inc.In Stock: 20307RT2517AGQV Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS73533DRVR are classified based on strict electrical and mechanical compatibility within the following criteria:

Parametric Equivalent Classification: Parts matching all critical electrical specifications including fixed 3.3V output, 500mA output current, 6.5V maximum input voltage, and equivalent dropout performance. Package form factor may differ while maintaining Surface Mount compatibility.

Manufacturer Recommended Classification: Parts approved by manufacturers as functional alternatives, accommodating minor variations in quiescent current, PSRR performance, and protection feature sets, provided output voltage and current ratings remain within specification.

The following parameters determine substitution eligibility:

• Output voltage configuration (Fixed 3.3V)
• Output current rating (500mA minimum)
• Maximum input voltage (≤6.5V)
• Voltage dropout performance (≤0.5V @ rated current)
• Surface Mount package type
• Operating temperature range (-40°C ~ 125°C minimum)
• RoHS3 compliance status

Parameter Comparison

Engineering Selection Recommendations

TPS73533DRVT (Parametric Equivalent): Direct functional equivalent from Texas Instruments with identical electrical specifications and package configuration. Suitable for one-to-one replacement in existing designs. Both parts maintain Active product status and ROHS3 compliance. Selection between TPS73533DRVR and TPS73533DRVT depends on packaging format (Cut Tape vs. Digi-Reel) and inventory availability.

LD39050PU33R (Manufacturer Recommended): STMicroelectronics alternative offering improved voltage dropout performance (0.4V vs. 0.5V) and lower quiescent current (50 µA vs. 65 µA). Package footprint differs (6-DFN 3x3 vs. 6-WSON 2x2), requiring PCB layout modification. Maximum input voltage is reduced to 5.5V. Includes Power Good output feature. Suitable for applications where lower power consumption and improved dropout performance justify layout redesign. Active product status and ROHS3 compliance maintained.

RT2517AGQV (Manufacturer Recommended): Richtek adjustable output regulator providing higher output current capability (1A vs. 500mA) and superior dropout performance (0.3V @ 1A). Output voltage is adjustable (1.2V ~ 5.7V) rather than fixed, requiring external resistor network for 3.3V configuration. Package footprint differs (8-AL-DFN 3x3). Quiescent current is significantly higher (400 µA). Operating temperature range limited to -40°C ~ 85°C. MSL rating is 3 (168 Hours) vs. 1 (Unlimited). Selection appropriate for designs requiring adjustable output or higher current delivery with tolerance for increased component count and power consumption.

Frequently Asked Questions (FAQ)

Q: Can TPS73533DRVT be used as a direct replacement for TPS73533DRVR?

A: Yes. TPS73533DRVT is a parametric equivalent with identical electrical specifications, output voltage, current rating, and package type. The difference is packaging format (Cut Tape vs. Digi-Reel). No circuit modifications are required.

Q: What are the key differences between TPS73533DRVR and LD39050PU33R?

A: Both deliver 3.3V fixed output at 500mA with -40°C ~ 125°C operating range. LD39050PU33R offers lower dropout voltage (0.4V vs. 0.5V) and quiescent current (50 µA vs. 65 µA). However, maximum input voltage is 5.5V (vs. 6.5V), and package footprint is 6-DFN (3x3) instead of 6-WSON (2x2), requiring PCB redesign. LD39050PU33R includes Power Good output; TPS73533DRVR includes Reverse Polarity protection.

Q: Is RT2517AGQV suitable for direct replacement?

A: RT2517AGQV is not a direct replacement. It is an adjustable output regulator requiring external resistor configuration to set 3.3V output. Higher output current (1A) and superior dropout (0.3V @ 1A) are available, but quiescent current is significantly higher (400 µA). Operating temperature range is limited to -40°C ~ 85°C. MSL rating is 3 (168 Hours). Selection requires circuit redesign and is appropriate only when higher current capability or adjustable output is required.

Q: What packaging considerations apply when substituting these parts?

A: TPS73533DRVR uses 6-WSON (2x2) package. TPS73533DRVT uses identical package. LD39050PU33R uses 6-DFN (3x3), and RT2517AGQV uses 8-AL-DFN (3x3). Footprint differences require PCB layout modification for LD39050PU33R and RT2517AGQV. Verify PCB design rules and thermal management requirements for each package type.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TPS73533DRVR, TPS73533DRVT, LD39050PU33R, and RT2517AGQV are all ROHS3 compliant. MSL ratings differ: TPS73533DRVR, TPS73533DRVT, and LD39050PU33R are MSL 1 (Unlimited); RT2517AGQV is MSL 3 (168 Hours).

Q: Which substitute part offers the best performance for low-power applications?

A: LD39050PU33R provides the lowest quiescent current (50 µA) and best dropout performance (0.4V @ 500mA), making it optimal for battery-powered or low-power designs. However, PCB layout modification is required due to different package footprint.