LM2931ACDR2G Equivalent & Substitute Parts

Part Overview

The LM2931ACDR2G is an active linear voltage regulator IC from onsemi, classified as a Power Management (PMIC) component. This positive adjustable regulator delivers 100mA output current in an 8-SOIC surface mount package. The device is currently in active production status with 30,200 units in stock. Alternative part numbers become necessary when addressing specific packaging requirements, automotive qualification needs, or supply chain constraints while maintaining identical electrical performance and mechanical compatibility.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	26V
Voltage - Output (Min/Fixed)	2.7V
Voltage - Output (Max)	29.5V
Voltage Dropout (Max)	0.6V @ 100mA
Current - Output	100mA
Current - Quiescent (Iq)	1 mA
Operating Temperature	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM2931ACDR2G is determined by strict equivalence across the following critical parameters: output configuration (positive), output type (adjustable), number of regulators (1), voltage specifications (input max 26V, output min 2.7V, output max 29.5V), current ratings (100mA output, 1mA quiescent), dropout voltage (0.6V @ 100mA), operating temperature range (-40°C ~ 125°C), and package form factor (8-SOIC). Substitute parts must maintain identical electrical performance within these specifications and use the same surface mount 8-SOIC package.

The substitute parts are grouped into two categories:

Parametric Equivalents (onsemi NCV2931 series): NCV2931ACDR2G and NCV2931CDR2G maintain 100% electrical equivalence with the LM2931ACDR2G while differing only in packaging format (Tape & Reel versus Cut Tape) and automotive qualification status (AEC-Q100). These parts share the identical base product number lineage and are direct functional replacements.

Similar Part (Texas Instruments LM2931CM/NOPB): This part maintains the same functional category and package form factor but operates under different electrical specifications, including reduced maximum input voltage range, different output voltage limits, improved dropout voltage, and extended quiescent current specifications. This part is suitable only when its specific electrical characteristics align with application requirements.

Parameter Comparison

Parameter	LM2931ACDR2G (Main)	NCV2931ACDR2G	NCV2931CDR2G	LM2931CM/NOPB
Manufacturer	onsemi	onsemi	onsemi	Texas Instruments
Output Configuration	Positive	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable	Adjustable
Voltage - Input (Max)	26V	26V	26V	26V
Voltage - Output (Min/Fixed)	2.7V	2.7V	2.7V	3V
Voltage - Output (Max)	29.5V	29.5V	29.5V	24V
Voltage Dropout (Max)	0.6V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	0.3V @ 100mA
Current - Output	100mA	100mA	100mA	100mA
Current - Quiescent (Iq)	1 mA	1 mA	1 mA	1 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT)	Bulk
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Qualification	Not specified	AEC-Q100	AEC-Q100	Not specified

Engineering Selection Recommendations

For direct functional replacement with identical electrical specifications: Select NCV2931ACDR2G or NCV2931CDR2G. Both parts maintain 100% electrical equivalence to the LM2931ACDR2G across all critical parameters. The NCV2931ACDR2G is supplied in Tape & Reel format with AEC-Q100 automotive qualification, suitable for high-volume production and automotive applications. The NCV2931CDR2G is supplied in Cut Tape format with identical automotive qualification, appropriate for lower-volume or mixed-component orders.

For applications requiring automotive qualification: Both NCV2931 variants carry AEC-Q100 qualification, making them suitable for automotive-grade designs. The LM2931ACDR2G does not specify automotive qualification status.

For applications with extended temperature operation: The LM2931ACDR2G and both NCV2931 variants support -40°C ~ 125°C operating range. The LM2931CM/NOPB from Texas Instruments operates only to 85°C maximum and is not suitable for extended temperature applications.

For applications with output voltage range constraints: The LM2931CM/NOPB specifies a minimum output voltage of 3V (versus 2.7V for onsemi parts) and maximum output voltage of 24V (versus 29.5V for onsemi parts). This part is suitable only when application requirements fall within these narrower limits.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and active production status.

Frequently Asked Questions (FAQ)

Q: Can NCV2931ACDR2G replace LM2931ACDR2G in my design?

A: Yes. The NCV2931ACDR2G maintains identical electrical specifications across all critical parameters: positive adjustable output, 100mA current rating, 26V maximum input voltage, 2.7V to 29.5V output voltage range, 0.6V dropout voltage, and -40°C to 125°C operating temperature. The only differences are packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and automotive qualification status (AEC-Q100 certified). Both parts use the same 8-SOIC package form factor and are pin-compatible.

Q: What is the difference between NCV2931ACDR2G and NCV2931CDR2G?

A: Both parts are electrically identical and carry AEC-Q100 automotive qualification. The difference is packaging format: NCV2931ACDR2G is supplied in Tape & Reel (TR) format, while NCV2931CDR2G is supplied in Cut Tape (CT) format. Select based on your procurement and assembly requirements. Tape & Reel is standard for high-volume automated assembly; Cut Tape is suitable for lower volumes or mixed-component orders.

Q: Can I use LM2931CM/NOPB from Texas Instruments as a substitute?

A: LM2931CM/NOPB is not a direct substitute. While it maintains the same 100mA output current and 8-SOIC package, it operates under different electrical specifications: minimum output voltage of 3V (not 2.7V), maximum output voltage of 24V (not 29.5V), improved dropout voltage of 0.3V, and maximum operating temperature of 85°C (not 125°C). Use this part only if your application requirements fall within these narrower specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. The LM2931ACDR2G, NCV2931ACDR2G, NCV2931CDR2G, and LM2931CM/NOPB are all ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity).

Q: Which substitute part should I select for automotive applications?

A: Both NCV2931ACDR2G and NCV2931CDR2G carry AEC-Q100 automotive qualification. Select NCV2931ACDR2G for high-volume production (Tape & Reel format) or NCV2931CDR2G for lower volumes (Cut Tape format). The LM2931ACDR2G does not specify automotive qualification.

Q: Do all parts use the same pinout?

A: Yes. All parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pin configuration, ensuring direct mechanical and electrical compatibility on the PCB.

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