TPS73133MDBVREP Equivalent & Substitute Parts

Part Overview

The TPS73133MDBVREP is a linear voltage regulator IC manufactured by Texas Instruments, delivering a fixed 3.3V output at 150mA in a SOT-23-5 surface mount package. This device is classified as a positive fixed output regulator with integrated protection features including over-current, over-temperature, short-circuit, and reverse-polarity protection. The part maintains active product status and is widely used in low-power applications requiring stable 3.3V regulation from input sources up to 5.5V.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or when specific performance characteristics better align with application needs while maintaining functional compatibility.

Substiute Parts

TPS73133MDBVREP

Texas InstrumentsIn Stock: 3761TPS73133MDBVREP Datasheet

Current PartRFQ

MAX8868EUK33+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4054MAX8868EUK33+T Datasheet

MFR RecommendedRFQ

MAX8878EUK33+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1486MAX8878EUK33+T Datasheet

MFR RecommendedRFQ

MIC5265-3.3YD5-TR

Microchip TechnologyIn Stock: 9997MIC5265-3.3YD5-TR Datasheet

MFR RecommendedRFQ

MIC5301-3.3YD5-TR

Microchip TechnologyIn Stock: 6645MIC5301-3.3YD5-TR Datasheet

MFR RecommendedRFQ

MIC5305-3.3YD5-TR

Microchip TechnologyIn Stock: 10525MIC5305-3.3YD5-TR Datasheet

MFR RecommendedRFQ

RT9193-30GB

Richtek USA Inc.In Stock: 20143RT9193-30GB Datasheet

MFR RecommendedRFQ

RT9193-33GB

Richtek USA Inc.In Stock: 95233RT9193-33GB Datasheet

MFR RecommendedRFQ

SP6205EM5-L-3-3/TR

MaxLinear, Inc.In Stock: 49017SP6205EM5-L-3-3/TR Datasheet

MFR RecommendedRFQ

TC2185-3.3VCTTR

Microchip TechnologyIn Stock: 19341TC2185-3.3VCTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS73133MDBVREP are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Fixed output voltage of 3.3V
• Output current capability of 150mA or greater
• Maximum input voltage of 5.5V or higher
• SOT-23-5 package compatibility
• Surface mount mounting type
• Active product status
• ROHS3 compliance

Grouping Logic:

Group 1 – Direct Equivalents (150mA Output, 3.3V, 5.5V Input Max): TC2185-3.3VCTTR, MAX8868EUK33+T, MAX8878EUK33+T, and MIC5265-3.3YD5-TR maintain the same output current specification and input voltage rating as the TPS73133MDBVREP, ensuring pin-compatible and functionally equivalent operation.

Group 2 – Enhanced Performance Equivalents (150mA Output, 3.3V, Improved Specifications): MIC5301-3.3YD5-TR and MIC5305-3.3YD5-TR provide 150mA output at 3.3V with superior PSRR characteristics and alternative protection feature sets, suitable for applications requiring lower quiescent current or enhanced noise rejection.

Group 3 – Higher Current Capability (300mA–500mA Output, 3.3V): RT9193-33GB and SP6205EM5-L-3-3/TR deliver increased output current (300mA and 500mA respectively) while maintaining 3.3V fixed output and 5.5V maximum input voltage, applicable when design requirements exceed 150mA capacity within the same voltage envelope.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Electrical Specifications):

TC2185-3.3VCTTR and MIC5301-3.3YD5-TR are the primary candidates for direct substitution. Both maintain 150mA output current, 3.3V fixed output, and SOT-23-5 package compatibility. TC2185-3.3VCTTR offers extended input voltage tolerance (6V maximum) and lower quiescent current (80 µA), while MIC5301-3.3YD5-TR provides superior PSRR performance (75dB ~ 50dB across 1kHz ~ 20kHz) and matches the TPS73133MDBVREP's 0.1V dropout specification at rated current.

For Applications Requiring Extended Temperature Range:

The TPS73133MDBVREP operates from -55°C to 125°C. Substitutes operating only to -40°C (MAX8868EUK33+T, MAX8878EUK33+T, RT9193-33GB, SP6205EM5-L-3-3/TR) are suitable only when the lower temperature limit of -40°C satisfies application requirements.

For Higher Output Current Capacity:

RT9193-33GB (300mA) and SP6205EM5-L-3-3/TR (500mA) provide increased current delivery while maintaining 3.3V output and 5.5V input maximum. These are applicable when load current exceeds 150mA within the same voltage regulation envelope.

For Low Quiescent Current Applications:

MIC5265-3.3YD5-TR delivers exceptionally low quiescent current (2 µA), beneficial for battery-powered or ultra-low-power standby applications, though with higher dropout voltage (0.5V @ 150mA).

Compliance Verification:

All substitute parts maintain ROHS3 compliance (SP6205EM5-L-3-3/TR carries RoHS Compliant designation) and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can MAX8868EUK33+T and MAX8878EUK33+T be used interchangeably with TPS73133MDBVREP?

A: Both Maxim parts are functionally equivalent in output voltage (3.3V) and current (150mA) with SOT-23-5 packaging. However, their operating temperature range is limited to -40°C ~ 85°C compared to the TPS73133MDBVREP's -55°C ~ 125°C. Substitution is valid only when application temperature requirements fall within -40°C to 85°C. Input voltage tolerance is higher (6.5V maximum versus 5.5V), providing additional design margin.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages?

A: TSOT-23-5 (Thin SOT-23-5) is a thinner variant of the standard SOT-23-5 package. Both are mechanically and electrically compatible for PCB mounting and soldering. The primary difference is package height, which may be relevant for space-constrained applications. Microchip Technology parts (MIC5265, MIC5301, MIC5305) use TSOT-23-5, while Texas Instruments (TPS73133MDBVREP) and Maxim parts use standard SOT-23-5.

Q: Is MIC5265-3.3YD5-TR suitable as a direct replacement despite its 0.5V dropout voltage?

A: MIC5265-3.3YD5-TR is functionally compatible but exhibits higher dropout voltage (0.5V @ 150mA) compared to TPS73133MDBVREP (0.1V @ 150mA). This increased dropout requires higher input voltage headroom and generates more heat under load. Substitution is appropriate only when input voltage margin and thermal dissipation accommodate the higher dropout specification. The part's ultra-low quiescent current (2 µA) makes it advantageous for low-power applications where dropout voltage is not a limiting factor.

Q: Can RT9193-33GB replace TPS73133MDBVREP in all applications?

A: RT9193-33GB provides 300mA output current versus the TPS73133MDBVREP's 150mA, making it suitable for higher-load applications. Both maintain 3.3V output, 5.5V input maximum, and SOT-23-5 packaging. However, RT9193-33GB has higher dropout voltage (0.3V @ 300mA) and operates only to -40°C minimum temperature. Substitution is valid when load current does not exceed 300mA and application temperature range is -40°C to 125°C.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Fixed output voltage of 3.3V, (2) Output current capability equal to or exceeding 150mA, (3) Maximum input voltage of 5.5V or higher, (4) SOT-23-5 or TSOT-23-5 package compatibility, (5) Surface mount mounting type, and (6) Active product status with appropriate compliance certifications. Deviations in any parameter require application-specific evaluation.

Q: Why does SP6205EM5-L-3-3/TR have higher output current (500mA) in the same package?

A: Higher current capability in the same package results from improved die design, thermal management, and internal circuit optimization by MaxLinear. The 500mA rating reflects the device's maximum safe operating current within thermal and electrical limits. Actual current delivery depends on input voltage, load resistance, and thermal conditions. This part is suitable when application load exceeds 150mA within the same voltage regulation envelope.