TPS78928DBVR Equivalent & Substitute Parts

Part Overview

The TPS78928DBVR is a linear voltage regulator IC from Texas Instruments, delivering a fixed 2.8V output at 100mA in an SOT-23-5 surface mount package. This device is classified as Active product status and is currently in stock with 11,000 units available. The regulator features integrated protection against overcurrent, overtemperature, and reverse polarity conditions, making it suitable for low-power applications requiring stable voltage regulation.

Substitute parts are necessary when the primary part reaches end-of-life status, inventory constraints occur, or when design requirements demand alternative electrical characteristics such as higher output current capability or different dropout voltage specifications.

Key Parameters

Parameter	TPS78928DBVR
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.8V
Output Current	100mA
Input Voltage (Max)	10V
Dropout Voltage (Max)	0.13V @ 100mA
Quiescent Current	28 µA
PSRR	85dB (1kHz)
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the TPS78928DBVR are classified based on the following electrical and mechanical parameters that determine functional equivalence:

Primary Substitution Criteria:

Fixed output voltage of 2.8V
Output current capability of 100mA or greater
SOT-23-5 package compatibility
Operating temperature range of -40°C to 125°C
Surface mount mounting type
ROHS3 compliance

Texas Instruments Direct Equivalents (TPS78928 and TPS76928 Series): These parts share identical output voltage, current rating, and package specifications. Differences exist in dropout voltage performance and PSRR characteristics. The TPS78928DBVT and TPS78928DBVR variants differ only in packaging format (Tape & Reel versus Cut Tape). The TPS76928 series variants offer alternative dropout voltage and PSRR profiles while maintaining core electrical compatibility.

Automotive-Grade Variant: The TPS76928QDBVRG4Q1 is qualified to AEC-Q100 automotive standards and is suitable for applications requiring automotive-grade components.

Cross-Manufacturer Alternatives: The MIC5219-2.8YM5-TR from Microchip Technology provides higher output current capability (500mA) in the same package, suitable for applications requiring increased current headroom. The TC1015-2.8VCT713 from Microchip Technology maintains the 100mA output current specification but operates with a maximum input voltage of 6V, requiring design verification for input voltage compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	PSRR	Packaging	Product Status
TPS78928DBVR	Texas Instruments	2.8V	100mA	10V	0.13V @ 100mA	28 µA	85dB (1kHz)	Tape & Reel	Active
TPS78928DBVT	Texas Instruments	2.8V	100mA	10V	0.13V @ 100mA	28 µA	85dB (1kHz)	Tape & Reel	Active
TPS76928DBVR	Texas Instruments	2.8V	100mA	10V	0.25V @ 100mA	28 µA	60dB (1kHz)	Cut Tape	Last Time Buy
TPS76928DBVT	Texas Instruments	2.8V	100mA	10V	0.25V @ 100mA	28 µA	60dB (1kHz)	Tape & Reel	Active
TPS76928QDBVRG4Q1	Texas Instruments	2.8V	100mA	10V	0.25V @ 100mA	28 µA	60dB (1kHz)	Tape & Reel	Active
MIC5219-2.8YM5-TR	Microchip Technology	2.8V	500mA	12V	0.6V @ 500mA	8 µA	75dB (120Hz)	Cut Tape & Digi-Reel	Active
TC1015-2.8VCT713	Microchip Technology	2.8V	100mA	6V	0.25V @ 100mA	80 µA	64dB (1kHz)	Tape & Reel	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): The TPS78928DBVT is the primary direct substitute, offering identical electrical specifications to the TPS78928DBVR with Active product status and full availability. Both variants maintain 0.13V maximum dropout voltage and 85dB PSRR performance.

For Cost-Optimized Substitution: The TPS76928DBVT provides functional equivalence with acceptable trade-offs in dropout voltage (0.25V versus 0.13V) and PSRR (60dB versus 85dB). This part is Active and maintains full inventory availability. The TPS76928DBVR variant is available in Cut Tape packaging but carries Last Time Buy status, indicating limited future availability.

For Automotive Applications: The TPS76928QDBVRG4Q1 is qualified to AEC-Q100 automotive standards and is suitable for automotive-grade designs. This part maintains the same electrical specifications as the TPS76928 series while providing automotive qualification.

For Higher Current Requirements: The MIC5219-2.8YM5-TR from Microchip Technology provides 500mA output current capability in the same SOT-23-5 package. This part is suitable when application requirements exceed the 100mA specification of the primary part. Note that maximum input voltage is 12V and dropout voltage is 0.6V at full current.

For Input Voltage-Constrained Applications: The TC1015-2.8VCT713 from Microchip Technology is suitable for applications with maximum input voltage of 6V. This part maintains 100mA output current but exhibits higher quiescent current (80 µA) and lower PSRR (64dB) compared to the primary part.

Frequently Asked Questions (FAQ)

Q: Can TPS76928 series parts directly replace TPS78928 series parts? A: Yes, with electrical performance trade-offs. The TPS76928 variants maintain identical output voltage, current rating, and package specifications. However, dropout voltage increases from 0.13V to 0.25V, and PSRR decreases from 85dB to 60dB. These differences are acceptable in applications where lower dropout voltage and higher noise rejection are not critical requirements.

Q: What is the difference between TPS78928DBVR and TPS78928DBVT? A: Both parts are electrically identical. The difference is packaging format: DBVR is supplied in Tape & Reel format, while DBVT is also supplied in Tape & Reel format. Both are Active products with full availability.

Q: Is the MIC5219-2.8YM5-TR a true substitute or an upgrade? A: The MIC5219-2.8YM5-TR is a higher-capability alternative rather than a direct substitute. It provides 500mA output current versus 100mA, making it suitable for applications requiring increased current capacity. However, it exhibits higher dropout voltage (0.6V at 500mA) and lower PSRR (75dB at 120Hz). Design verification is required to confirm compatibility with input voltage and noise performance requirements.

Q: Can I use TC1015-2.8VCT713 if my input voltage exceeds 6V? A: No. The TC1015-2.8VCT713 has a maximum input voltage rating of 6V. Using this part with input voltages above 6V violates the device specification and may result in device failure or degraded performance.

Q: What is the significance of AEC-Q100 qualification on the TPS76928QDBVRG4Q1? A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This part is suitable for automotive applications where component qualification to automotive standards is required. Non-automotive variants do not carry this qualification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed in this reference maintain ROHS3 compliance status, meeting environmental and regulatory requirements for lead-free manufacturing.

Q: What packaging formats are available for these parts? A: All parts use the SOT-23-5 (SC-74A) surface mount package. Packaging format variations include Tape & Reel (TR) and Cut Tape (CT) options, which affect supply and handling but do not impact electrical performance or pin compatibility.

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