TPS79133MDBVTEP Equivalent & Substitute Parts

Part Overview

The TPS79133MDBVTEP is a linear voltage regulator IC from Texas Instruments, delivering a fixed 3.3V output at 100mA in a SOT-23-5 surface mount package. This device is classified as Active and provides essential power management functionality for low-power applications requiring stable regulated voltage with integrated protection features including over-current, over-temperature, reverse polarity, and under-voltage lockout protection.

Substitute parts are necessary when the original part is unavailable, when higher output current capacity is required, or when alternative manufacturers' components offer improved electrical characteristics such as lower dropout voltage or reduced quiescent current while maintaining functional compatibility.

Key Parameters

Parameter	TPS79133MDBVTEP
Manufacturer	Texas Instruments
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 (SC-74A)
Operating Temperature	-55°C ~ 125°C
Product Status	Active
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TPS79133MDBVTEP is determined by the following critical parameters:

Fixed output voltage of 3.3V
Surface mount SOT-23-5 package compatibility
Positive output configuration
Enable control feature
Over-current and over-temperature protection
RoHS3 compliance
Active or recently active product status

Substitute parts must maintain the 3.3V fixed output voltage and operate within the same package footprint (SOT-23-5). Output current capacity may exceed the original 100mA specification, as higher-rated devices remain functionally compatible. Input voltage maximum of 5.5V or greater ensures compatibility with standard supply rails. Dropout voltage, quiescent current, and PSRR characteristics may vary but do not prevent substitution when other parameters align.

Parameter Comparison

Parameter	TPS79133MDBVTEP	MIC5255-3.3YD5-TR	MIC5301-3.3YD5-TR	MIC5305-3.3YD5-TR	RT9193-33GB	S-1137A33-M5T1U	TC2015-3.3VCTTR
Manufacturer	Texas Instruments	Microchip Technology	Microchip Technology	Microchip Technology	Richtek USA Inc.	ABLIC Inc.	Microchip Technology
Output Voltage	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V	3.3V
Output Current	100mA	150mA	150mA	150mA	300mA	300mA	100mA
Input Voltage (Max)	5.5V	6V	5.5V	5.5V	5.5V	5.5V	6V
Dropout Voltage (Max)	0.9V @ 100mA	0.25V @ 150mA	0.1V @ 150mA	0.85V @ 150mA	0.3V @ 300mA	0.31V @ 300mA	0.14V @ 100mA
Quiescent Current	250 µA	150 µA	120 µA	150 µA	130 µA	1 µA	80 µA
Package	SOT-23-5	TSOT-23-5	TSOT-23-5	TSOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Active	Active	Active	Active	Active	Obsolete	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and are suitable for applications requiring a 3.3V fixed output linear regulator in SOT-23-5 packaging.

For applications requiring the original 100mA output current specification, TC2015-3.3VCTTR from Microchip Technology is the direct equivalent, offering improved dropout voltage performance (0.14V @ 100mA versus 0.9V) and lower quiescent current (80 µA versus 250 µA) while maintaining Active product status.

For applications where higher output current capacity is beneficial, MIC5301-3.3YD5-TR, MIC5305-3.3YD5-TR, and MIC5255-3.3YD5-TR provide 150mA output, and RT9193-33GB provides 300mA output. All three Microchip MIC series devices are Active and offer superior dropout voltage characteristics.

S-1137A33-M5T1U from ABLIC Inc. is classified as Obsolete and should be avoided for new designs despite its exceptional quiescent current specification of 1 µA. This part also has a reduced operating temperature maximum of 85°C compared to the original specification of 125°C.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher output current rating than the original TPS79133MDBVTEP?

A: Yes. A substitute part rated for 150mA or 300mA output current is functionally compatible with applications designed for 100mA, provided all other electrical parameters (output voltage, input voltage range, package, and protection features) align with the original specification.

Q: Are TSOT-23-5 and SOT-23-5 packages interchangeable?

A: TSOT-23-5 (thin SOT-23-5) and standard SOT-23-5 packages share identical pin configurations and footprints. Both are compatible with the same PCB layout and can be used interchangeably in most applications.

Q: What is the significance of dropout voltage differences between the original and substitute parts?

A: Dropout voltage determines the minimum input-to-output voltage differential required for proper regulation. Lower dropout voltage allows operation with lower input supply voltages or provides better regulation stability. The original TPS79133MDBVTEP has a dropout voltage of 0.9V @ 100mA, while substitutes such as TC2015-3.3VCTTR (0.14V @ 100mA) and MIC5301-3.3YD5-TR (0.1V @ 150mA) offer significantly improved performance in this parameter.

Q: Why is S-1137A33-M5T1U listed as Obsolete?

A: S-1137A33-M5T1U is classified as Obsolete by ABLIC Inc., indicating it is no longer in active production. While inventory may be available, new designs should not rely on this part due to uncertain long-term availability and the reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C for the original).

Q: Which substitute offers the best quiescent current performance?

A: S-1137A33-M5T1U provides the lowest quiescent current at 1 µA. However, due to its Obsolete status and limited temperature range, TC2015-3.3VCTTR (80 µA) is the recommended choice for low-power applications requiring Active product status.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original TPS79133MDBVTEP.

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