TPS76133DBVT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The TPS76133DBVT is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed 3.3V output at 100mA in a SOT-23-5 surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited availability. Finding equivalent and substitute parts is necessary to ensure design continuity and long-term supply chain reliability for applications requiring 3.3V regulation in compact form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	TPS76133DBVT
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	100mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.28V @ 100mA
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the TPS76133DBVT are categorized based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Output voltage configuration: 3.3V fixed output
Output current capability: 100mA or greater
Package type: SOT-23-5 (SC-74A, SOT-753)
Input voltage rating: 16V maximum or greater
Surface mount technology
Operating temperature range: -40°C to 125°C minimum

Substitution Categories:

Direct Parametric Equivalents meet all primary criteria with identical or superior electrical specifications and active product status.

Functional Alternatives provide 3.3V output in SOT-23-5 packaging but with variations in output current, dropout voltage, or quiescent current that may require application-level verification.

Output Voltage Variants are 5V regulators in identical packaging that serve different voltage domains and are not direct substitutes but are listed for reference.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Product Status	Packaging Type
TPS76133DBVT	Texas Instruments	3.3V	100mA	16V	0.28V @ 100mA	115 µA	SOT-23-5	Last Time Buy	Tape & Reel (TR)
TPS76133DBVR	Texas Instruments	3.3V	100mA	16V	0.28V @ 100mA	115 µA	SOT-23-5	Active	Cut Tape (CT) & Digi-Reel®
ADP3309ARTZ-3.3-R7	Analog Devices Inc.	3.3V	100mA	12V	0.25V @ 100mA	300 µA	SOT-23-5	Active	Cut Tape (CT) & Digi-Reel®
MIC5225-3.3YM5-TR	Microchip Technology	3.3V	150mA	16V	0.45V @ 150mA	Not specified	SOT-23-5	Active	Cut Tape (CT) & Digi-Reel®
MIC5203-3.3YM5-TR	Microchip Technology	3.3V	80mA	16V	0.6V @ 80mA	750 µA	SOT-23-5	Active	Tape & Reel (TR)
LD2981CM50TR	STMicroelectronics	5V	100mA	16V	0.375V @ 100mA	150 µA	SOT-23-5	Active	Tape & Reel (TR)
LD2981ABM50TR	STMicroelectronics	5V	100mA	16V	0.375V @ 100mA	150 µA	SOT-23-5	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Recommended Primary Substitute: TPS76133DBVR

The TPS76133DBVR is the direct parametric equivalent to the TPS76133DBVT, manufactured by Texas Instruments with identical electrical specifications. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). This part maintains Active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry identical certifications (REACH Unaffected, EAR99, HTSUS 8542.39.0001).

Secondary Substitute: ADP3309ARTZ-3.3-R7

The ADP3309ARTZ-3.3-R7 from Analog Devices Inc. provides 3.3V output at 100mA in SOT-23-5 packaging with Active product status. This part features lower dropout voltage (0.25V versus 0.28V) and operates within a 12V maximum input specification. The quiescent current is higher at 300 µA compared to 115 µA. This device includes Error Flag and Shutdown control features not present in the TPS76133DBVT. Operating temperature range is -20°C to 80°C, which is narrower than the original part's -40°C to 125°C range.

Alternative for Higher Current Applications: MIC5225-3.3YM5-TR

The MIC5225-3.3YM5-TR from Microchip Technology provides 3.3V output at 150mA, offering 50% higher current capability than the original part. This device is suitable for applications requiring increased output current within the same package footprint. Dropout voltage is 0.45V at 150mA. This part is Active and ROHS3 compliant.

Not Recommended for Direct Substitution: MIC5203-3.3YM5-TR

The MIC5203-3.3YM5-TR provides 3.3V output but at only 80mA, below the original 100mA specification. Dropout voltage is significantly higher at 0.6V, and quiescent current is elevated at 750 µA. This part is suitable only for current-limited applications.

Not Recommended for Direct Substitution: LD2981 Series (LD2981CM50TR, LD2981ABM50TR)

The LD2981 series provides 5V output, not 3.3V, and therefore cannot serve as direct substitutes for 3.3V applications. These parts are listed for reference only in voltage domain conversion scenarios.

Frequently Asked Questions (FAQ)

Q: Can I use TPS76133DBVR as a direct replacement for TPS76133DBVT?

A: Yes. The TPS76133DBVR is a direct parametric equivalent with identical electrical specifications. The difference is packaging format: TPS76133DBVR is supplied in Cut Tape & Digi-Reel® format while TPS76133DBVT is Tape & Reel. Both are SOT-23-5 surface mount packages with identical pinouts and performance characteristics.

Q: What is the difference between the packaging formats (Tape & Reel vs. Cut Tape & Digi-Reel®)?

A: Tape & Reel (TR) supplies components on continuous carrier tape in reel format, typically for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® provides components on cut tape segments or alternative reel formats. Both formats contain identical components; the difference is in delivery and handling method. Verify your assembly equipment compatibility before selecting packaging format.

Q: Can I use MIC5225-3.3YM5-TR if my application only requires 100mA?

A: Yes. The MIC5225-3.3YM5-TR is rated for 150mA output current, which exceeds the 100mA requirement. Using a higher-rated device in a lower-current application does not create functional issues. However, verify that the higher dropout voltage (0.45V versus 0.28V) does not impact your input voltage headroom or thermal budget.

Q: Why is the ADP3309ARTZ-3.3-R7 not recommended as a primary substitute despite having lower dropout voltage?

A: While the ADP3309ARTZ-3.3-R7 offers superior dropout voltage (0.25V), it has a narrower operating temperature range (-20°C to 80°C versus -40°C to 125°C) and higher quiescent current (300 µA versus 115 µA). The reduced temperature range may not meet applications requiring full industrial temperature operation. Select this part only if your application operates within the -20°C to 80°C window and quiescent current is not a constraint.

Q: Are the LD2981 series parts suitable substitutes?

A: No. The LD2981 series provides 5V output, not 3.3V. These parts operate in a different voltage domain and cannot replace the TPS76133DBVT in 3.3V applications. They are listed for reference only if your design requires 5V regulation in the same package footprint.

Q: What compliance certifications should I verify when selecting a substitute?

A: All listed substitute parts are ROHS3 compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Verify HTSUS codes match your procurement requirements. All parts listed carry identical or equivalent compliance status to the original TPS76133DBVT.

Q: Can I use MIC5203-3.3YM5-TR if my application draws less than 80mA?

A: The MIC5203-3.3YM5-TR is rated for 80mA maximum output, which is below the original 100mA specification. Use this part only if your application current requirement is confirmed to be 80mA or less. The significantly higher dropout voltage (0.6V) and quiescent current (750 µA) may also impact power efficiency and thermal performance.

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