LM2940IMP-10 Equivalent & Substitute Parts

Part Overview

The LM2940IMP-10 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 10V output at 1A maximum current in a SOT-223-4 surface mount package. The device incorporates integrated protection features including over-current, over-temperature, reverse polarity, and short-circuit protection, operating across the industrial temperature range of -40°C to 85°C.

The LM2940IMP-10 carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring this specific voltage regulation topology and electrical performance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	10V
Output Current	1A
Input Voltage (Max)	26V
Voltage Dropout (Max)	1V @ 1A
Quiescent Current	10 mA
PSRR	63dB (120Hz)
Package / Case	TO-261-4, TO-261AA (SOT-223-4)
Mounting Type	Surface Mount
Operating Temperature	-40°C to 85°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, Short Circuit

Substitute Part Grouping Explanation

Substitute parts for the LM2940IMP-10 are identified based on strict electrical and mechanical parameter matching:

Electrical Equivalence Criteria:

Fixed output voltage: 10V
Output current rating: 1A
Maximum input voltage: 26V
Voltage dropout: 1V @ 1A
Quiescent current: 10 mA
PSRR: 63dB (120Hz)
Protection features: Over Current, Over Temperature, Reverse Polarity, Short Circuit
Operating temperature range: -40°C to 85°C

Mechanical Equivalence Criteria:

Package type: SOT-223-4 (TO-261-4, TO-261AA)
Mounting type: Surface Mount
Supplier device package: SOT-223-4

Substitute parts maintain identical electrical performance and physical form factor, ensuring direct replacement capability in existing PCB designs without layout modifications.

Parameter Comparison

Parameter	LM2940IMP-10	LM2940IMP-10/NOPB	LM2940IMPX-10/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Voltage	10V	10V	10V
Output Current	1A	1A	1A
Input Voltage (Max)	26V	26V	26V
Voltage Dropout (Max)	1V @ 1A	1V @ 1A	1V @ 1A
Quiescent Current	10 mA	10 mA	10 mA
PSRR	63dB (120Hz)	63dB (120Hz)	63dB (120Hz)
Package / Case	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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, Short Circuit	Over Current, Over Temperature, Reverse Polarity, Short Circuit	Over Current, Over Temperature, Reverse Polarity, Short Circuit
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)

Engineering Selection Recommendations

LM2940IMP-10/NOPB is the primary substitute for the obsolete LM2940IMP-10. Both parts share identical electrical specifications and package configuration. The LM2940IMP-10/NOPB maintains active product status and achieves ROHS3 compliance, addressing regulatory requirements for new designs. Packaging format remains compatible with existing procurement workflows (Cut Tape & Digi-Reel).

LM2940IMPX-10/NOPB provides an alternative substitute with identical electrical and mechanical specifications. This variant differs in packaging format, supplied as Tape & Reel (TR) rather than Cut Tape. The LM2940IMPX-10/NOPB is suitable for high-volume production environments where reel-based component handling is standard. ROHS3 compliance is maintained.

Both substitute parts are manufactured by Texas Instruments and carry active product status, ensuring long-term availability and supply chain stability compared to the obsolete original part number.

Frequently Asked Questions (FAQ)

Q: Can LM2940IMP-10/NOPB directly replace LM2940IMP-10 in existing designs?

A: Yes. The LM2940IMP-10/NOPB is a direct parametric equivalent with identical electrical performance (10V output, 1A current, 1V dropout, 63dB PSRR) and physical form factor (SOT-223-4 surface mount package). No circuit modifications or PCB layout changes are required.

Q: What is the difference between LM2940IMP-10/NOPB and LM2940IMPX-10/NOPB?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: LM2940IMP-10/NOPB is supplied in Cut Tape & Digi-Reel format, while LM2940IMPX-10/NOPB is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both LM2940IMP-10/NOPB and LM2940IMPX-10/NOPB achieve ROHS3 compliance. The original LM2940IMP-10 is RoHS non-compliant. Substitution with either active part number satisfies RoHS regulatory requirements for new designs.

Q: Do the substitute parts maintain the same protection features?

A: Yes. All three part numbers include identical protection features: over-current, over-temperature, reverse polarity, and short-circuit protection. Operating temperature range remains -40°C to 85°C across all variants.

Q: Which substitute part should be selected for new designs?

A: For new designs, either LM2940IMP-10/NOPB or LM2940IMPX-10/NOPB is acceptable. Selection is based on packaging requirements: use LM2940IMP-10/NOPB for standard procurement workflows or LM2940IMPX-10/NOPB for high-volume production with reel-based assembly processes.

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