LM2931M-5.0 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM2931M-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 100mA current capacity in an 8-SOIC surface mount package. This part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning. The device provides regulated 5V output from input voltages up to 26V with integrated protection features including over-temperature, reverse polarity, and short-circuit protection.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	26V
Voltage Dropout (Max)	0.3V @ 100mA
Quiescent Current	1 mA
Package	8-SOIC (0.154", 3.90mm Width)
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LM2931M-5.0 is determined by the following critical parameters:

Output voltage specification: 5V fixed
Output current capability: 100mA minimum
Package type: 8-SOIC surface mount
Input voltage rating: 26V maximum
Mounting compatibility: Surface mount technology
Regulatory compliance: ROHS3 Compliant

Substitute parts are grouped into three categories based on manufacturer and packaging configuration while maintaining identical electrical output specifications and package footprint compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Voltage Dropout @ 100mA	Quiescent Current	PSRR (120Hz)	Operating Temp Range	Packaging	Product Status
LM2931M-5.0	Texas Instruments	5V	100mA	0.3V	1 mA	55dB	-40°C ~ 85°C	Tube	Last Time Buy
LM2931M-5.0/NOPB	Texas Instruments	5V	100mA	0.3V	1 mA	55dB	-40°C ~ 85°C	Tube	Active
LM2931AM-5.0/NOPB	Texas Instruments	5V	100mA	0.3V	15 mA	80dB	-40°C ~ 85°C	Tube	Active
LM2931AD-5.0G	onsemi	5V	100mA	0.6V	1 mA	90dB	-40°C ~ 125°C	Tube	Active
LM2931AD-5.0R2G	onsemi	5V	100mA	0.6V	1 mA	90dB	-40°C ~ 125°C	Cut Tape & Digi-Reel	Active
LM2931AD50R	STMicroelectronics	5V	100mA	0.6V	1 mA	75dB	-40°C ~ 125°C	Cut Tape & Digi-Reel	Active
LM2931D-5.0R2G	onsemi	5V	100mA	0.6V	1 mA	90dB	-40°C ~ 125°C	Cut Tape & Digi-Reel	Active
NCV2931AD-5.0R2G	onsemi	5V	100mA	0.6V	1 mA	90dB	-40°C ~ 125°C	Tape & Reel	Active

Engineering Selection Recommendations

Direct Replacement (Texas Instruments): LM2931M-5.0/NOPB is the active production equivalent from Texas Instruments with identical electrical specifications and packaging. This part maintains the same 0.3V dropout voltage and 55dB PSRR performance as the original LM2931M-5.0.

Enhanced Performance Alternative (Texas Instruments): LM2931AM-5.0/NOPB offers improved PSRR performance (80dB vs 55dB) while maintaining the same 5V output and 100mA current rating. Higher quiescent current (15mA vs 1mA) and supply current (30mA vs 15mA) should be evaluated for power-sensitive applications.

Cross-Manufacturer Substitutes (onsemi): LM2931AD-5.0G, LM2931AD-5.0R2G, and LM2931D-5.0R2G provide extended operating temperature range (-40°C to 125°C vs -40°C to 85°C), improved PSRR (90dB), and active product status. Voltage dropout increases to 0.6V at 100mA. Available in tube and cut tape packaging configurations.

Cross-Manufacturer Substitute (STMicroelectronics): LM2931AD50R maintains core specifications with 0.6V dropout and 75dB PSRR. Extended temperature range to 125°C and active status support long-term availability.

Automotive Grade Option: NCV2931AD-5.0R2G from onsemi is AEC-Q100 qualified for automotive applications with identical electrical performance to other onsemi variants. Supplied in tape and reel packaging with 111,100 units in stock.

All substitute parts maintain ROHS3 compliance, 8-SOIC package footprint compatibility, and surface mount mounting type. Selection should prioritize product status (all substitutes are Active), required operating temperature range, and packaging format for procurement logistics.

Frequently Asked Questions (FAQ)

Q: Can LM2931M-5.0 be replaced with LM2931AM-5.0/NOPB?

A: Yes. Both are Texas Instruments products with identical 5V output, 100mA current, and 8-SOIC packaging. The AM variant offers superior PSRR (80dB vs 55dB) but has higher quiescent current (15mA vs 1mA). Verify power budget requirements before substitution.

Q: What is the difference between onsemi LM2931AD and STMicroelectronics LM2931AD50R?

A: Both provide 5V/100mA output in 8-SOIC packages with extended temperature range to 125°C. onsemi variants offer 90dB PSRR while STMicroelectronics offers 75dB PSRR. Voltage dropout is 0.6V for both. Selection depends on PSRR performance requirements and supplier availability.

Q: Is NCV2931AD-5.0R2G suitable for non-automotive applications?

A: Yes. NCV2931AD-5.0R2G is AEC-Q100 qualified but functionally equivalent to standard LM2931AD-5.0R2G. It provides identical 5V/100mA output, 90dB PSRR, and 8-SOIC packaging. Automotive qualification does not restrict use in non-automotive designs.

Q: What packaging options are available for substitutes?

A: Tube packaging: LM2931M-5.0/NOPB, LM2931AM-5.0/NOPB, LM2931AD-5.0G. Cut Tape & Digi-Reel: LM2931AD-5.0R2G, LM2931AD50R, LM2931D-5.0R2G. Tape & Reel: NCV2931AD-5.0R2G. Select based on procurement volume and assembly line requirements.

Q: Does the 0.6V dropout voltage of onsemi and STMicroelectronics parts affect circuit design?

A: The increase from 0.3V to 0.6V dropout voltage requires 0.3V additional input voltage headroom. For applications with tight input voltage margins, verify that maximum input voltage (26V) and minimum required output voltage (5V) accommodate the higher dropout specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and are suitable for applications requiring RoHS certification.

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