TPS73033DBVRG4 Equivalent & Substitute Parts

Part Overview

The TPS73033DBVRG4 is a linear voltage regulator IC from Texas Instruments designed to deliver a fixed 3.3V output at 200mA in a compact SOT-23-5 surface mount package. This device is classified as discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and production continuity. The regulator incorporates protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) functionality, operating across the industrial temperature range of -40°C to 125°C.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	200mA
Input Voltage (Max)	5.5V
Voltage Dropout (Max)	0.21V @ 200mA
Quiescent Current	250 µA
PSRR	68dB (100Hz)
Package	SOT-23-5
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, UVLO

Substitute Part Grouping Explanation

Substitute parts for the TPS73033DBVRG4 are categorized based on strict electrical and mechanical compatibility criteria:

Parametric Equivalents (Texas Instruments TPS73033 and TPS79333 Series): These parts maintain identical output voltage (3.3V), output current capability (200mA), input voltage rating (5.5V maximum), package format (SOT-23-5), and operating temperature range (-40°C to 125°C). Differences in product status (active vs. discontinued) and packaging format (Cut Tape & Digi-Reel vs. other configurations) do not affect functional substitution.

Manufacturer Recommended Alternatives (Microchip and Richtek): These parts share the same output voltage (3.3V), package type (SOT-23-5 or TSOT-23-5), operating temperature range, and control/protection feature sets. However, they differ in output current capability (150mA to 300mA) and voltage dropout characteristics. Selection depends on specific application current requirements.

Key Substitution Criteria:

Fixed output voltage: 3.3V
Package compatibility: SOT-23-5 or TSOT-23-5
Operating temperature range: -40°C to 125°C
Control features: Enable function present
Protection features: Over-temperature and UVLO protection minimum

Parameter Comparison

Part Number	Manufacturer	Output Current	Voltage Dropout (Max)	Quiescent Current	PSRR	Package	Product Status
TPS73033DBVRG4	Texas Instruments	200mA	0.21V @ 200mA	250 µA	68dB (100Hz)	SOT-23-5	Discontinued
TPS73033DBVR	Texas Instruments	200mA	0.21V @ 200mA	250 µA	68dB (100Hz)	SOT-23-5	Active
TPS73033DBVT	Texas Instruments	200mA	0.21V @ 200mA	250 µA	68dB (100Hz)	SOT-23-5	Active
TPS79333DBVREP	Texas Instruments	200mA	0.18V @ 200mA	220 µA	70dB ~ 43dB (100Hz ~ 100kHz)	SOT-23-5	Active
TPS79333DBVRG4Q1	Texas Instruments	200mA	0.18V @ 200mA	220 µA	70dB ~ 43dB (100Hz ~ 100kHz)	SOT-23-5	Active
TPS79333DBVRQ1	Texas Instruments	200mA	0.18V @ 200mA	220 µA	70dB ~ 43dB (100Hz ~ 100kHz)	SOT-23-5	Active
MIC5255-3.3YD5-TR	Microchip Technology	150mA	0.25V @ 150mA	150 µA	60dB ~ 50dB (10Hz ~ 10kHz)	TSOT-23-5	Active
MIC5265-3.3YD5-TR	Microchip Technology	150mA	0.5V @ 150mA	2 µA	64dB ~ 62dB (1kHz ~ 100Hz)	TSOT-23-5	Active
MIC5301-3.3YD5-TR	Microchip Technology	150mA	0.1V @ 150mA	120 µA	75dB ~ 50dB (1kHz ~ 20kHz)	TSOT-23-5	Active
MIC5323-3.3YD5-TR	Microchip Technology	300mA	0.17V @ 300mA	150 µA	80dB ~ 65dB (1kHz ~ 10kHz)	TSOT-23-5	Active
RT9193-33GB	Richtek USA Inc.	300mA	0.3V @ 300mA	130 µA	70dB ~ 50dB (100Hz ~ 10kHz)	SOT-23-5	Active

Engineering Selection Recommendations

Direct Replacements (Highest Compatibility): TPS73033DBVR and TPS73033DBVT are direct parametric equivalents to the TPS73033DBVRG4, differing only in product status (active) and packaging format. Both maintain identical electrical specifications and are suitable for direct substitution in existing designs.

Enhanced Performance Alternatives: The TPS79333 series (TPS79333DBVREP, TPS79333DBVRG4Q1, TPS79333DBVRQ1) offers improved performance characteristics including lower voltage dropout (0.18V vs. 0.21V) and reduced quiescent current (220 µA vs. 250 µA). TPS79333DBVRG4Q1 and TPS79333DBVRQ1 carry AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components.

Current-Limited Alternatives: Microchip MIC5255-3.3YD5-TR, MIC5265-3.3YD5-TR, and MIC5301-3.3YD5-TR are rated for 150mA output current, suitable only for applications requiring less than 150mA. MIC5323-3.3YD5-TR and RT9193-33GB support 300mA output current, providing headroom for higher-current applications.

Compliance Considerations: All listed parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL) is 1 (unlimited) for Texas Instruments parts and Microchip parts, except RT9193-33GB which specifies MSL 3 (168 hours).

Frequently Asked Questions (FAQ)

Q: Can I use TPS73033DBVR or TPS73033DBVT as direct replacements for TPS73033DBVRG4? A: Yes. Both parts are parametric equivalents with identical electrical specifications, output voltage, current rating, and package format. The primary difference is product status (active vs. discontinued) and packaging configuration.

Q: What is the difference between TPS73033 and TPS79333 series? A: Both series deliver 3.3V at 200mA in SOT-23-5 packages. TPS79333 offers superior performance with lower dropout voltage (0.18V vs. 0.21V) and lower quiescent current (220 µA vs. 250 µA). TPS79333DBVRG4Q1 and TPS79333DBVRQ1 include AEC-Q100 automotive qualification.

Q: Can I substitute a 150mA-rated part for the 200mA TPS73033DBVRG4? A: Only if your application draws less than 150mA. Microchip MIC5255, MIC5265, and MIC5301 series are rated for 150mA maximum output. Exceeding this rating will trigger over-current protection or cause voltage regulation failure.

Q: Are Microchip MIC5323 and Richtek RT9193 suitable replacements? A: Yes, for applications requiring equal or greater current capacity. MIC5323-3.3YD5-TR and RT9193-33GB both support 300mA output, exceeding the original 200mA specification. Verify that your PCB layout and thermal management accommodate the selected part.

Q: What is the difference between SOT-23-5 and TSOT-23-5 packages? A: TSOT-23-5 is a thin variant of SOT-23-5 with reduced height. Both packages are mechanically and electrically compatible for most applications. Verify PCB footprint compatibility before substitution.

Q: Do all substitute parts support the Enable control feature? A: Yes. All listed substitute parts include Enable control functionality, maintaining feature parity with the TPS73033DBVRG4.

Q: Which substitute offers the lowest voltage dropout? A: MIC5301-3.3YD5-TR provides the lowest dropout at 0.1V @ 150mA, followed by MIC5323-3.3YD5-TR at 0.17V @ 300mA. TPS79333 series offers 0.18V @ 200mA.

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