LM2931ACDR2 Equivalent & Substitute Parts

Part Overview

The LM2931ACDR2 is a linear voltage regulator IC featuring positive adjustable output configuration with 100mA current capacity in an 8-SOIC surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The LM2931ACDR2 provides adjustable output voltage regulation from 2.7V to 29.5V with maximum input voltage of 26V and integrated over-current and over-temperature protection.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Current - Output	100mA
Voltage - Input (Max)	26V
Voltage - Output (Min/Fixed)	2.7V
Voltage - Output (Max)	29.5V
Voltage Dropout (Max)	0.6V @ 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
Protection Features	Over Current, Over Temperature

Substitute Part Grouping Explanation

Substitution for the LM2931ACDR2 is determined by strict equivalence across the following critical parameters:

Output Configuration: Positive
Output Type: Adjustable
Current - Output: 100mA
Voltage - Input (Max): 26V
Voltage - Output range: 2.7V to 29.5V
Voltage Dropout (Max): 0.6V @ 100mA
Operating Temperature: -40°C ~ 125°C
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Protection Features: Over Current, Over Temperature

All substitute parts listed maintain identical electrical specifications and package configuration. Differences exist only in product status (active vs. obsolete), packaging format (Cut Tape, Digi-Reel, Tape & Reel), RoHS compliance status, and automotive qualification where applicable.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output (mA)	Vin (Max)	Vout Min/Max	Dropout (Max)	Package	Packaging Format	RoHS Status	Automotive Grade
LM2931ACDR2	onsemi	Obsolete	100	26V	2.7V / 29.5V	0.6V @ 100mA	8-SOIC	Standard	Non-compliant	No
LM2931ACDR2G	onsemi	Active	100	26V	2.7V / 29.5V	0.6V @ 100mA	8-SOIC	Cut Tape & Digi-Reel	ROHS3 Compliant	No
LM2931CDR2G	onsemi	Active	100	26V	2.7V / 29.5V	0.6V @ 100mA	8-SOIC	Cut Tape & Digi-Reel	ROHS3 Compliant	No
NCV2931ACDR2G	onsemi	Active	100	26V	2.7V / 29.5V	0.6V @ 100mA	8-SOIC	Tape & Reel	ROHS3 Compliant	Yes (AEC-Q100)
NCV2931CDR2G	onsemi	Active	100	26V	2.7V / 29.5V	0.6V @ 100mA	8-SOIC	Cut Tape	ROHS3 Compliant	Yes (AEC-Q100)

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete LM2931ACDR2:

LM2931ACDR2G and LM2931CDR2G provide active product status with ROHS3 compliance and identical electrical performance. These parts are suitable for standard industrial and commercial applications. LM2931ACDR2G offers availability in Cut Tape and Digi-Reel packaging formats, while LM2931CDR2G is available in Cut Tape format.

NCV2931ACDR2G and NCV2931CDR2G are automotive-grade alternatives qualified to AEC-Q100 standard with ROHS3 compliance. These parts are required for automotive applications and provide the same electrical specifications as the industrial-grade LM2931 variants. NCV2931ACDR2G is supplied in Tape & Reel format, while NCV2931CDR2G is available in Cut Tape format.

Selection between LM2931 and NCV2931 base part numbers depends on application requirements: industrial applications use LM2931 variants, while automotive applications mandate NCV2931 variants. Packaging format selection (Cut Tape, Digi-Reel, or Tape & Reel) is determined by production volume and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2931ACDR2 be replaced with LM2931ACDR2G?

A: Yes. LM2931ACDR2G is a direct electrical equivalent with identical output current, voltage specifications, dropout characteristics, and package configuration. The primary difference is product status (active vs. obsolete) and ROHS3 compliance. LM2931ACDR2G is the recommended replacement for new designs.

Q: What is the difference between LM2931 and NCV2931 part numbers?

A: NCV2931 variants are automotive-grade parts qualified to AEC-Q100 standard, suitable for automotive applications. LM2931 variants are industrial-grade parts for standard commercial and industrial use. Electrical specifications are identical; selection depends on application requirements.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package configuration, ensuring identical footprint and pin compatibility on PCB layouts designed for the LM2931ACDR2.

Q: What does the packaging format difference mean?

A: Packaging format refers to delivery method: Cut Tape (CT) is suitable for lower-volume manual assembly, Digi-Reel is a tape format for automated pick-and-place equipment, and Tape & Reel (TR) is standard for high-volume automated production. All formats contain identical components; selection is based on production volume and assembly process.

Q: Is RoHS compliance important for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other regions. If your application requires EU market distribution or compliance with RoHS directives, select ROHS3 compliant variants (LM2931ACDR2G, LM2931CDR2G, NCV2931ACDR2G, or NCV2931CDR2G). The original LM2931ACDR2 is RoHS non-compliant.

Q: Can I use NCV2931 parts in non-automotive applications?

A: Yes. NCV2931 automotive-grade parts meet or exceed industrial-grade specifications and can be used in non-automotive applications. However, automotive-

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