TPS79633DCQRG4 Equivalent & Substitute Parts

Part Overview

The TPS79633DCQRG4 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 1A current capacity in SOT-223-6 surface mount packaging. This device is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this specific power management function.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	1A
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.33V @ 1A
Quiescent Current	385 µA
Package / Case	SOT-223-6
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the TPS79633DCQRG4 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Output voltage configuration: Positive fixed 3.3V
Output current capacity: 1A
Maximum input voltage: 5.5V
Dropout voltage: 0.33V @ 1A
Package type: SOT-223-6 surface mount
Protection features: Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Control features: Enable function
Operating temperature range: -40°C ~ 125°C
RoHS compliance: ROHS3 Compliant

Parts meeting these parameters are classified as either MFR Recommended substitutes (active product status with standard packaging) or Parametric Equivalents (active product status with additional qualifications such as automotive grade).

Parameter Comparison

Parameter	TPS79633DCQRG4 (Main)	TPS79633DCQR (MFR Recommended)	TPS79633QDCQRQ1 (Parametric Equivalent)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Last Time Buy	Active	Active
Output Voltage	3.3V	3.3V	3.3V
Output Current	1A	1A	1A
Input Voltage (Max)	5.5V	5.5V	5.5V
Dropout Voltage (Max)	0.33V @ 1A	0.33V @ 1A	0.33V @ 1A
Quiescent Current	385 µA	385 µA	385 µA
PSRR	59dB ~ 42dB (100Hz ~ 100kHz)	59dB ~ 42dB (100Hz ~ 100kHz)	59dB ~ 42dB (100Hz ~ 100kHz)
Package / Case	SOT-223-6	SOT-223-6	SOT-223-6
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®
Grade	Standard	Standard	Automotive
Qualification	-	-	AEC-Q100
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	3 (168 Hours)

Engineering Selection Recommendations

The TPS79633DCQRG4 is designated Last Time Buy status. For ongoing production and new designs, the TPS79633DCQR is the primary substitute, offering identical electrical specifications and active product status with standard industrial grade qualification.

The TPS79633QDCQRQ1 is a parametric equivalent with automotive grade qualification and AEC-Q100 certification. This variant is suitable for applications requiring automotive-grade components and extended reliability assurance. The increased moisture sensitivity level (MSL 3 vs MSL 2) requires consideration of storage and handling procedures.

Both substitute parts maintain full electrical and functional compatibility with the original TPS79633DCQRG4 within the specified operating parameters. Selection between substitutes depends on application requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can TPS79633DCQR directly replace TPS79633DCQRG4 in existing designs?

A: Yes. The TPS79633DCQR provides identical electrical performance, output voltage, current capacity, protection features, and operating temperature range. The primary difference is product status (Active vs Last Time Buy) and packaging format (Cut Tape & Digi-Reel® vs Tape & Reel). No circuit modifications are required.

Q: What is the difference between TPS79633DCQR and TPS79633QDCQRQ1?

A: Both parts are parametric equivalents with identical electrical specifications. The TPS79633QDCQRQ1 includes automotive grade qualification and AEC-Q100 certification, making it suitable for automotive applications. The moisture sensitivity level differs (MSL 2 vs MSL 3), affecting storage and handling requirements.

Q: Are there packaging compatibility considerations?

A: All three parts use SOT-223-6 surface mount packaging with identical pinout and footprint. Packaging format differences (Tape & Reel vs Cut Tape & Digi-Reel®) affect supply and handling but do not impact PCB assembly or electrical performance.

Q: Which substitute should be selected for new designs?

A: For standard industrial applications, TPS79633DCQR is the recommended choice due to active product status and standard industrial grade. For automotive applications, TPS79633QDCQRQ1 is appropriate due to AEC-Q100 qualification.

Q: Are all parts RoHS compliant?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

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