LM2937IMP-8.0 Equivalent & Substitute Parts

Part Overview

The LM2937IMP-8.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 500mA output current with an 8V fixed output voltage and operates across a -40°C to 85°C temperature range. The main part number is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	8V
Voltage - Input (Max)	26V
Current - Output	500mA
Voltage Dropout (Max)	1V @ 500mA
Current - Quiescent (Iq)	10 mA
Operating Temperature	-40°C ~ 85°C (TJ)
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-4
Mounting Type	Surface Mount
Protection Features	Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage

Substitute Part Grouping Explanation

Substitute parts for the LM2937IMP-8.0 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Output voltage: 8V fixed
Maximum input voltage: 26V
Output current capability: 500mA
Voltage dropout: 1V @ 500mA
Quiescent current: 10 mA
Package type: SOT-223-4 (TO-261-4, TO-261AA)
Operating temperature range: -40°C ~ 85°C
Protection features: Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage

All substitute parts listed maintain identical electrical specifications and package compatibility with the main part number.

Parameter Comparison

Parameter	LM2937IMP-8.0	LM2937IMP-8.0/NOPB	LM2937IMPX-8.0	LM2937IMPX-8.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Last Time Buy	Active
Voltage - Output (Min/Fixed)	8V	8V	8V	8V
Voltage - Input (Max)	26V	26V	26V	26V
Current - Output	500mA	500mA	500mA	500mA
Voltage Dropout (Max)	1V @ 500mA	1V @ 500mA	1V @ 500mA	1V @ 500mA
Current - Quiescent (Iq)	10 mA	10 mA	10 mA	10 mA
Operating Temperature	-40°C ~ 85°C (TJ)	-40°C ~ 85°C (TJ)	-40°C ~ 85°C (TJ)	-40°C ~ 85°C (TJ)
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-4	SOT-223-4	SOT-223-4	SOT-223-4
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For new designs and procurement, LM2937IMPX-8.0/NOPB is the primary recommended substitute. This part number is currently active in production, compliant with ROHS3 standards, and available in Tape & Reel packaging suitable for automated assembly processes. It maintains full electrical and mechanical compatibility with the obsolete LM2937IMP-8.0.

LM2937IMP-8.0/NOPB serves as an alternative active substitute with identical electrical specifications and ROHS3 compliance. This part is available in Tape & Reel packaging and represents a direct functional equivalent.

LM2937IMPX-8.0 is classified as Last Time Buy and should be considered only when LM2937IMPX-8.0/NOPB is unavailable. This part maintains full parameter compatibility but has limited future availability.

The original LM2937IMP-8.0 is obsolete and should not be selected for new designs due to RoHS non-compliance and discontinued production status.

Frequently Asked Questions (FAQ)

Q: Can LM2937IMP-8.0/NOPB be used as a direct replacement for LM2937IMP-8.0?

A: Yes. Both parts share identical electrical specifications including 8V fixed output, 500mA output current, 26V maximum input voltage, and 1V dropout at 500mA. Package compatibility is maintained with SOT-223-4 (TO-261-4, TO-261AA). The primary difference is product status and RoHS compliance.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix indicates the part is supplied without lead-free plating on the leads. This designation affects packaging and handling but does not alter electrical performance or functional compatibility.

Q: Is LM2937IMPX-8.0/NOPB suitable for new production designs?

A: Yes. LM2937IMPX-8.0/NOPB is active in production, ROHS3 compliant, and maintains all required electrical and mechanical parameters. It is the recommended choice for new designs requiring an 8V fixed output linear regulator with 500mA capability.

Q: What is the difference between LM2937IMPX-8.0 and LM2937IMPX-8.0/NOPB?

A: Both parts are electrically identical with matching specifications. The difference lies in product status: LM2937IMPX-8.0 is Last Time Buy, while LM2937IMPX-8.0/NOPB is Active. For ongoing procurement, LM2937IMPX-8.0/NOPB is preferred.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use SOT-223-4 package (TO-261-4, TO-261AA) with surface mount mounting type, ensuring PCB layout compatibility.

Q: What protection features are included in these regulators?

A: All listed parts include Mirror-Image Insertion, Over Temperature, Short Circuit, and Transient Voltage protection features.

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