TPS79133DBVRG4 Equivalent & Substitute Parts

Part Overview

The TPS79133DBVRG4 is a linear voltage regulator IC from Texas Instruments, configured as a positive fixed 3.3V output with 100mA current capacity in SOT-23-5 surface mount packaging. This device is classified as Last Time Buy, indicating end-of-life status. The regulator includes integrated protection features for over-current, over-temperature, reverse polarity, and under-voltage lockout conditions, with a maximum input voltage of 5.5V and dropout voltage of 0.9V at full load.

Due to Last Time Buy status, identifying functionally equivalent and manufacturer-recommended substitute parts is essential for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	100mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.9V @ 100mA
Quiescent Current	250 µA
Package	SOT-23-5
Operating Temperature Range	-40°C to 85°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, UVLO

Substitute Part Grouping Explanation

Substitute parts for the TPS79133DBVRG4 are categorized based on the following substitution criteria:

Parametric Equivalents maintain identical electrical specifications: 3.3V fixed output, 100mA current capacity, 5.5V maximum input, 0.9V dropout voltage, and SOT-23-5 packaging. These parts are direct functional replacements with no design modifications required.

Manufacturer-Recommended Substitutes provide enhanced performance characteristics while maintaining 3.3V output and SOT-23-5 packaging compatibility. These parts offer higher output current capacity (150mA to 300mA), lower dropout voltages, improved quiescent current performance, and extended operating temperature ranges (-40°C to 125°C). These upgrades provide superior performance margins without requiring circuit redesign.

Key Substitution Parameters:

Output voltage: 3.3V (fixed, non-negotiable)
Package type: SOT-23-5 or TSOT-23-5 (pin-compatible)
Output configuration: Positive fixed output
Control features: Enable function required
RoHS3 compliance and MSL 1 rating maintained across all substitutes

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Operating Temp Range	Package	Product Status
TPS79133DBVRG4	Texas Instruments	100mA	5.5V	0.9V @ 100mA	250 µA	-40°C to 85°C	SOT-23-5	Last Time Buy
TPS79133DBVR	Texas Instruments	100mA	5.5V	0.9V @ 100mA	250 µA	-40°C to 85°C	SOT-23-5	Last Time Buy
TPS79133DBVT	Texas Instruments	100mA	5.5V	0.9V @ 100mA	250 µA	-40°C to 85°C	SOT-23-5	Last Time Buy
TPS7A2033PDBVR	Texas Instruments	300mA	6V	0.14V @ 300mA	15 µA	-40°C to 125°C	SOT-23-5	Active
LDK130M33R	STMicroelectronics	300mA	5.5V	0.4V @ 300mA	60 µA	-40°C to 125°C	SOT-23-5	Active
MIC5255-3.3YD5-TR	Microchip Technology	150mA	6V	0.25V @ 150mA	150 µA	-40°C to 125°C	TSOT-23-5	Active
MIC5255-3.3YM5-TR	Microchip Technology	150mA	6V	0.25V @ 150mA	150 µA	-40°C to 125°C	SOT-23-5	Active
MIC5301-3.3YD5-TR	Microchip Technology	150mA	5.5V	0.1V @ 150mA	120 µA	-40°C to 125°C	TSOT-23-5	Active
MIC5305-3.3YD5-TR	Microchip Technology	150mA	5.5V	0.85V @ 150mA	150 µA	-40°C to 125°C	TSOT-23-5	Active
MIC5323-3.3YD5-TR	Microchip Technology	300mA	5.5V	0.17V @ 300mA	150 µA	-40°C to 125°C	TSOT-23-5	Active
RT9193-33GB	Richtek USA Inc.	300mA	5.5V	0.3V @ 300mA	130 µA	-40°C to 125°C	SOT-23-5	Active

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents): TPS79133DBVR and TPS79133DBVT are parametric equivalents with identical electrical specifications and Last Time Buy status. These parts are suitable for immediate substitution without circuit modification. Both maintain the same 100mA output current, 0.9V dropout voltage, and -40°C to 85°C operating range.

For Enhanced Performance (Manufacturer-Recommended Active Alternatives): TPS7A2033PDBVR (Texas Instruments) is the manufacturer-recommended substitute, offering Active product status with 300mA output capacity, significantly reduced quiescent current (15 µA vs. 250 µA), and extended temperature range to 125°C. This part is suitable for new designs and provides superior performance margins.

LDK130M33R (STMicroelectronics) provides Active status with automotive-grade qualification (AEC-Q100), 300mA capacity, and 0.4V dropout voltage. This part is appropriate for applications requiring automotive-grade components.

RT9193-33GB (Richtek USA Inc.) offers Active status with 300mA capacity, 0.3V dropout voltage, and high inventory availability (95,200 units). This part provides cost-effective performance enhancement.

For Microchip Technology Alternatives: MIC5323-3.3YD5-TR provides 300mA capacity with 0.17V dropout voltage and Active status. MIC5301-3.3YD5-TR and MIC5305-3.3YD5-TR offer 150mA capacity with Active status and extended temperature range. These parts are available in TSOT-23-5 (thin) or SOT-23-5 packaging variants.

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and 3.3V fixed output configuration. Selection should prioritize Active product status parts for long-term supply chain security.

Frequently Asked Questions (FAQ)

Q: Can TPS79133DBVR or TPS79133DBVT be used as direct replacements for TPS79133DBVRG4? A: Yes. Both parts are parametric equivalents with identical electrical specifications: 100mA output current, 3.3V fixed output, 5.5V maximum input, 0.9V dropout voltage, and SOT-23-5 packaging. No circuit modifications are required. Both parts share Last Time Buy status.

Q: What is the primary advantage of TPS7A2033PDBVR over the original TPS79133DBVRG4? A: TPS7A2033PDBVR offers Active product status (vs. Last Time Buy), 300mA output capacity (vs. 100mA), significantly lower quiescent current (15 µA vs. 250 µA), reduced dropout voltage (0.14V vs. 0.9V), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). These improvements provide superior performance margins and long-term supply availability.

Q: Are TSOT-23-5 packages pin-compatible with SOT-23-5? A: TSOT-23-5 (thin variant) and SOT-23-5 packages are pin-compatible and can be used interchangeably in the same PCB footprint. The primary difference is package thickness. Verify PCB assembly equipment compatibility with thin package specifications if using TSOT-23-5 variants.

Q: Which substitute part offers the lowest dropout voltage? A: TPS7A2033PDBVR provides the lowest dropout voltage at 0.14V @ 300mA, followed by MIC5323-3.3YD5-TR at 0.17V @ 300mA. Lower dropout voltage reduces power dissipation and improves efficiency in battery-powered applications.

Q: Can I use a 300mA-rated substitute in place of the 100mA TPS79133DBVRG4? A: Yes. Higher current-rated regulators are backward-compatible with lower current requirements. The 300mA-rated parts (TPS7A2033PDBVR, LDK130M33R, MIC5323-3.3YD5-TR, RT9193-33GB) can supply 100mA loads without modification. This approach provides performance headroom and future design flexibility.

Q: What is the significance of Last Time Buy status? A: Last Time Buy indicates the manufacturer will discontinue production. Existing inventory is available but will not be replenished. For long-term supply chain security, migration to Active product status alternatives is recommended.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original TPS79133DBVRG4 specifications.

Q: Which substitute offers the best quiescent current performance? A: TPS7A2033PDBVR provides the lowest quiescent current at 15 µA, making it optimal for battery-powered or low-power standby applications. This represents a 94% reduction compared to the original 250 µA specification.

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