LM2941CSX Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM2941CSX is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 1A output current with a maximum input voltage of 26V and adjustable output voltage range from 5V to 20V. The device features integrated protection for over-temperature, reverse polarity, and short-circuit conditions, with an enable control feature for power management applications.

The LM2941CSX is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	26V
Voltage - Output (Min/Fixed)	5V
Voltage - Output (Max)	20V
Current - Output	1A
Voltage Dropout (Max)	1V @ 1A
Control Features	Enable
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature	0°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LM2941CSX are identified based on strict alignment with the following critical parameters:

Output configuration (positive)
Output type (adjustable)
Package compatibility (TO-263 family)
Maximum input voltage (26V)
Output current capability (1A or greater)
Enable control feature
Surface mount technology

The LM2941CSX/NOPB is a parametric equivalent from Texas Instruments with identical electrical specifications and package format. The MIC29372WU from Microchip Technology is a manufacturer-recommended substitute that meets the core functional requirements while offering enhanced performance characteristics in specific areas.

Parameter Comparison

Parameter	LM2941CSX	LM2941CSX/NOPB	MIC29372WU
Manufacturer	Texas Instruments	Texas Instruments	Microchip Technology
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Voltage - Input (Max)	26V	26V	26V
Voltage - Output (Min/Fixed)	5V	5V	1.24V
Voltage - Output (Max)	20V	20V	26V
Current - Output	1A	1A	750mA
Voltage Dropout (Max)	1V @ 1A	1V @ 1A	0.75V @ 750mA
Control Features	Enable	Enable	Enable
Protection Features	Over Temperature, Reverse Polarity, Short Circuit	Over Temperature, Reverse Polarity, Short Circuit	Over Current, Over Temperature
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The LM2941CSX/NOPB is the direct parametric equivalent and primary substitute. It maintains identical electrical specifications and package format while offering active product status and ROHS3 compliance, addressing obsolescence concerns for the original LM2941CSX.

The MIC29372WU from Microchip Technology is a manufacturer-recommended alternative suitable for applications where the design specifications permit the following variations: adjustable output voltage range of 1.24V to 26V (versus 5V to 20V), output current of 750mA (versus 1A), and extended operating temperature range of -40°C to 125°C (versus 0°C to 125°C). The MIC29372WU provides improved dropout voltage performance at 0.75V and includes over-current protection. Both substitute parts are ROHS3 compliant and maintain active product status, ensuring long-term supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the LM2941CSX/NOPB be used as a direct replacement for the LM2941CSX?

A: Yes. The LM2941CSX/NOPB is a parametric equivalent with identical electrical specifications, output current rating, voltage ranges, and package format. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What are the key differences between the LM2941CSX and MIC29372WU?

A: The MIC29372WU has a lower output current rating (750mA versus 1A) and a wider adjustable output voltage range (1.24V to 26V versus 5V to 20V). The MIC29372WU offers superior dropout voltage performance (0.75V versus 1V) and an extended operating temperature range (-40°C to 125°C). Both devices use the same TO-263 package and support enable control.

Q: Is the MIC29372WU suitable for applications requiring 1A output current?

A: No. The MIC29372WU is rated for 750mA maximum output current. Applications requiring sustained 1A output should use the LM2941CSX/NOPB or equivalent 1A-rated regulators.

Q: Are all substitute parts compatible with the TO-263 package footprint?

A: Yes. The LM2941CSX/NOPB and MIC29372WU both use the TO-263-6 D2PAK (5 Leads + Tab) package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What compliance certifications apply to the substitute parts?

A: Both the LM2941CSX/NOPB and MIC29372WU are ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification and HTSUS code 8542.39.0001.

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