LM2941LDX Equivalent & Substitute Parts

Part Overview

The LM2941LDX is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 1A output current in an 8-WSON (4x4) surface mount package and supports input voltages up to 26V with adjustable output ranging from 5V to 20V. The LM2941LDX is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	8-WDFN Exposed Pad
Supplier Device Package	8-WSON (4x4)
Output Configuration	Positive
Output Type	Adjustable
Voltage - Input (Max)	26V
Voltage - Output (Min/Fixed)	5V
Voltage - Output (Max)	20V
Current - Output	1A
Voltage Dropout (Max)	1V @ 1A
Current - Quiescent (Iq)	10 mA
Current - Supply (Max)	15 mA
Control Features	Enable
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the LM2941LDX is determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish valid substitutes:

Critical Parameters for Substitution:

Output configuration (Positive)
Output type (Adjustable)
Voltage specifications (Input Max: 26V, Output Min: 5V, Output Max: 20V)
Current rating (1A output)
Voltage dropout (1V @ 1A)
Package type (8-WSON 4x4)
Protection features (Over Temperature, Reverse Polarity, Short Circuit)
Control features (Enable)
Operating temperature range (-40°C ~ 125°C)

All substitute parts listed maintain these specifications without deviation. Differences in product status, RoHS compliance, and moisture sensitivity level do not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	LM2941LDX	LM2941LDX/NOPB	LM2941LD	LM2941LD/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	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)	5V	5V	5V	5V
Voltage - Output (Max)	20V	20V	20V	20V
Current - Output	1A	1A	1A	1A
Voltage Dropout (Max)	1V @ 1A	1V @ 1A	1V @ 1A	1V @ 1A
Current - Quiescent (Iq)	10 mA	10 mA	10 mA	10 mA
Current - Supply (Max)	15 mA	15 mA	15 mA	15 mA
Control Features	Enable	Enable	Enable	Enable
Protection Features	Over Temperature, Reverse Polarity, Short Circuit	Over Temperature, Reverse Polarity, Short Circuit	Over Temperature, Reverse Polarity, Short Circuit	Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-WDFN Exposed Pad	8-WDFN Exposed Pad	8-WDFN Exposed Pad	8-WDFN Exposed Pad
Supplier Device Package	8-WSON (4x4)	8-WSON (4x4)	8-WSON (4x4)	8-WSON (4x4)
Product Status	Obsolete	Active	Last Time Buy	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

LM2941LDX/NOPB is the primary direct substitute. This part maintains full electrical and mechanical equivalence while offering active product status and ROHS3 compliance. The /NOPB designation indicates lead-free processing, aligning with modern manufacturing standards. Moisture sensitivity level of 3 (168 hours) requires standard handling procedures during storage and assembly.

LM2941LD provides an alternative with identical electrical specifications and unlimited moisture sensitivity (MSL 1), reducing handling constraints. This part carries Last Time Buy status, indicating limited future availability. ROHS3 compliance is maintained.

LM2941LD/NOPB combines active product status with lead-free processing and full electrical equivalence. Moisture sensitivity level of 3 applies standard industry handling requirements.

For new designs and production continuity, LM2941LDX/NOPB or LM2941LD/NOPB are preferred due to active status. For applications with extended storage requirements and no lead-free mandate, LM2941LD offers unlimited moisture sensitivity.

Frequently Asked Questions (FAQ)

Q: Can LM2941LDX/NOPB be used as a direct replacement for LM2941LDX?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The /NOPB designation indicates lead-free processing and ROHS3 compliance. LM2941LDX/NOPB is active status while LM2941LDX is obsolete.

Q: What is the difference between LM2941LD and LM2941LDX?

A: Both parts share identical electrical specifications and package type (8-WSON 4x4). The primary difference is product status: LM2941LDX is obsolete while LM2941LD is Last Time Buy. Moisture sensitivity differs (MSL 1 vs. MSL 1 for LM2941LDX), but electrical performance is equivalent.

Q: Are there any compatibility issues when substituting these parts?

A: No compatibility issues exist among the listed substitutes. All parts maintain identical output configuration, voltage specifications, current ratings, protection features, and package dimensions. PCB layout and circuit design require no modification.

Q: What does the /NOPB suffix mean?

A: /NOPB indicates lead-free (No Lead) processing and ROHS3 compliance. These parts meet RoHS Directive requirements and are suitable for applications with environmental or regulatory mandates for lead-free components.

Q: How does moisture sensitivity level affect component selection?

A: MSL 1 (Unlimited) allows indefinite storage without baking. MSL 3 (168 Hours) requires components to be baked before reflow if storage exceeds 168 hours in standard humidity conditions. For applications with extended inventory holding, MSL 1 parts reduce preparation requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All listed parts are pin-compatible and electrically equivalent. No circuit modifications, PCB redesign, or firmware changes are required for substitution.

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