LP2954IM Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2954IM is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 250mA output current with adjustable voltage regulation from 1.23V to 29V, suitable for power management applications requiring precision voltage control.

The LP2954IM carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this regulator topology.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	30V
Voltage - Output (Min/Fixed)	1.23V
Voltage - Output (Max)	29V
Voltage Dropout (Max)	0.8V @ 250mA
Current - Output	250mA
Current - Quiescent (Iq)	150 µA
Current - Supply (Max)	33 mA
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LP2954IM are identified based on strict electrical and mechanical parameter matching within the Power Management (PMIC) category. The substitution criteria are:

Critical Parameters for Substitution:

Output Configuration: Positive
Output Type: Adjustable
Voltage range: Input (Max) 30V, Output 1.23V to 29V
Current - Output: 250mA
Voltage Dropout: 0.8V @ 250mA
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Control Features: Enable
Protection Features: Over Current, Over Temperature, Reverse Polarity
Operating Temperature: -40°C ~ 125°C

All identified substitutes maintain identical electrical specifications and mechanical compatibility with the original LP2954IM, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Parameter	LP2954IM (Main)	LP2954IM/NOPB (Direct)	LP2954AIM/NOPB (Parametric)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Voltage - Input (Max)	30V	30V	30V
Voltage - Output (Min/Fixed)	1.23V	1.23V	1.23V
Voltage - Output (Max)	29V	29V	29V
Voltage Dropout (Max)	0.8V @ 250mA	0.8V @ 250mA	0.8V @ 250mA
Current - Output	250mA	250mA	250mA
Current - Quiescent (Iq)	150 µA	150 µA	150 µA
Current - Supply (Max)	33 mA	33 mA	33 mA
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

LP2954IM/NOPB is classified as a Direct Manufacturer substitute. This part maintains complete electrical and mechanical equivalence to the LP2954IM while carrying Active product status from Texas Instruments. The LP2954IM/NOPB achieves ROHS3 compliance, addressing regulatory requirements for new designs and production runs. Packaging is specified as Tube format with 2140 units in current inventory.

LP2954AIM/NOPB is classified as a Parametric Equivalent substitute. This variant delivers identical electrical performance and mechanical compatibility across all specified parameters. The LP2954AIM/NOPB maintains Active product status and ROHS3 compliance. This part number variant is available in Tube packaging with 3936 units in current inventory, providing enhanced supply availability.

Both substitute parts are manufactured by Texas Instruments and share the LP2954 base product number. Selection between LP2954IM/NOPB and LP2954AIM/NOPB depends on supply chain availability and inventory requirements, as both deliver equivalent functional performance in 8-SOIC package applications.

Frequently Asked Questions (FAQ)

Q: Can LP2954IM/NOPB directly replace LP2954IM in existing designs?

A: Yes. LP2954IM/NOPB maintains identical electrical specifications, output characteristics, protection features, and 8-SOIC package dimensions. The part is functionally interchangeable for all circuit applications utilizing the original LP2954IM.

Q: What is the difference between LP2954IM/NOPB and LP2954AIM/NOPB?

A: Both parts deliver identical electrical performance and mechanical compatibility. The difference lies in the part number designation (IM versus AIM variant) and product availability. Both are Active status parts with ROHS3 compliance and equivalent 250mA output current capability.

Q: Why is the original LP2954IM marked as Obsolete?

A: The LP2954IM carries Obsolete status, indicating Texas Instruments has discontinued active production. The substitute parts LP2954IM/NOPB and LP2954AIM/NOPB maintain Active status and represent the current manufacturing alternatives for this regulator topology.

Q: Are there RoHS compliance differences between the main part and substitutes?

A: Yes. The original LP2954IM is RoHS non-compliant, while both LP2954IM/NOPB and LP2954AIM/NOPB achieve ROHS3 compliance. For new designs or production requiring regulatory compliance, the substitute parts are required.

Q: Is the 8-SOIC package identical across all three part numbers?

A: Yes. All three parts utilize the 8-SOIC (0.154", 3.90mm Width) package with identical pin configuration, footprint, and mechanical dimensions. PCB layout and component placement remain unchanged when substituting between these parts.

Q: What inventory levels are available for each substitute?

A: LP2954IM/NOPB has 2140 units in stock. LP2954AIM/NOPB has 3936 units in stock. Both are supplied in Tube packaging format.

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