LM2931AM-5.0 Equivalent & Substitute Parts

Part Overview

The LM2931AM-5.0 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 5V positive output at 100mA with a maximum input voltage of 26V and operates across the temperature range of -40°C to 85°C. The device integrates protection features including over-temperature, reverse polarity, and short-circuit protection. Currently in Last Time Buy status with 2985 pieces in stock, this part requires identification of equivalent alternatives for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Voltage - Input (Max)	26V
Current - Output	100mA
Voltage Dropout (Max)	0.3V @ 100mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LM2931AM-5.0 is determined by the following critical parameters:

Output voltage specification (5V fixed)
Maximum output current capability (100mA)
Input voltage rating (26V maximum)
Package type (8-SOIC surface mount)
Operating temperature range compatibility
Protection feature set (over-temperature, reverse polarity, short-circuit)
RoHS and regulatory compliance status

Substitute parts must maintain identical output voltage and current ratings, support the same maximum input voltage, and use the same 8-SOIC package. Variations in dropout voltage, quiescent current, and PSRR are acceptable provided the part meets the core electrical specifications. Temperature range extensions and enhanced protection features represent functional improvements and do not preclude substitution.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage @ 100mA	Operating Temperature	Package	Product Status	RoHS Status
LM2931AM-5.0	Texas Instruments	5V	100mA	26V	0.3V	-40°C ~ 85°C	8-SOIC	Last Time Buy	ROHS3 Compliant
LM2931AM-5.0/NOPB	Texas Instruments	5V	100mA	26V	0.3V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
LM2931M-5.0/NOPB	Texas Instruments	5V	100mA	26V	0.3V	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
LM2931M-5.0	National Semiconductor	5V	100mA	26V	0.6V	-40°C ~ 85°C	8-SOIC	Active	RoHS non-compliant
LM2931AD-5.0G	onsemi	5V	100mA	26V	0.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant
LM2931AD-5.0R2G	onsemi	5V	100mA	26V	0.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant
LM2931AD50R	STMicroelectronics	5V	100mA	26V	0.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant
LM2931D-5.0R2G	onsemi	5V	100mA	26V	0.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant
NCV2931AD-5.0R2G	onsemi	5V	100mA	26V	0.6V	-40°C ~ 125°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the LM2931AM-5.0, the following selection criteria apply based on product status and compliance:

Primary Substitutes (Active Status, ROHS3 Compliant, Texas Instruments): LM2931AM-5.0/NOPB and LM2931M-5.0/NOPB maintain full electrical equivalence with the original part, identical dropout voltage performance, and active product status. Both are ROHS3 compliant and available in higher inventory quantities.

Secondary Substitutes (Active Status, ROHS3 Compliant, Extended Temperature Range): LM2931AD-5.0G, LM2931AD-5.0R2G, LM2931D-5.0R2G, and NCV2931AD-5.0R2G from onsemi, and LM2931AD50R from STMicroelectronics provide extended operating temperature to -40°C ~ 125°C. These parts accept 0.6V dropout voltage and are suitable for applications requiring wider temperature operation. NCV2931AD-5.0R2G includes automotive-grade qualification (AEC-Q100).

Legacy Substitute (Active Status, RoHS Non-Compliant): LM2931M-5.0 from National Semiconductor is electrically equivalent but does not meet ROHS3 compliance requirements and should be avoided for new designs subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can I substitute LM2931AM-5.0 with LM2931AM-5.0/NOPB? A: Yes. Both parts are from Texas Instruments with identical electrical specifications, 5V fixed output, 100mA current rating, 0.3V dropout voltage, and 8-SOIC packaging. The /NOPB designation indicates lead-free plating and does not affect functional compatibility.

Q: What is the difference between LM2931M-5.0/NOPB and LM2931AD-5.0R2G? A: Both deliver 5V at 100mA in 8-SOIC packages. LM2931M-5.0/NOPB (Texas Instruments) has 0.3V dropout voltage and -40°C ~ 85°C operating range. LM2931AD-5.0R2G (onsemi) has 0.6V dropout voltage but extends to -40°C ~ 125°C. Selection depends on thermal requirements and acceptable dropout voltage for your application.

Q: Is NCV2931AD-5.0R2G suitable for automotive applications? A: Yes. NCV2931AD-5.0R2G is qualified to AEC-Q100 automotive standards and carries automotive-grade designation. It maintains 5V output, 100mA current, and 8-SOIC packaging with extended temperature range to 125°C.

Q: Why does LM2931M-5.0 show RoHS non-compliant status? A: LM2931M-5.0 from National Semiconductor predates ROHS3 compliance requirements. For new designs and procurement subject to RoHS regulations, use ROHS3-compliant alternatives such as LM2931AM-5.0/NOPB or onsemi variants.

Q: Can I use parts with 0.6V dropout voltage instead of 0.3V? A: Yes, provided your circuit design accommodates the additional voltage drop. Parts with 0.6V dropout (onsemi and STMicroelectronics variants) are direct functional substitutes. Verify that your input voltage headroom and load regulation requirements are met with the higher dropout specification.

Q: What packaging options are available for LM2931 5V regulators? A: All listed substitutes use 8-SOIC (0.154", 3.90mm Width) surface-mount packaging. Packaging variants include Tube, Cut Tape & Digi-Reel, and Tape & Reel configurations, which affect handling and procurement but do not change electrical performance or PCB footprint compatibility.

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