LP3982IMM-2.5 Equivalent & Substitute Parts

Part Overview

The LP3982IMM-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 2.5V output at 300mA with a maximum input voltage of 6V and dropout voltage of 0.22V at 200mA. The device integrates over-current, over-temperature, and reverse polarity protection, operating across the -40°C to 85°C temperature range.

The LP3982IMM-2.5 carries an Obsolete product status. Locating equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	300mA
Input Voltage (Max)	6V
Dropout Voltage (Max)	0.22V @ 200mA
Quiescent Current	270 µA
Output Configuration	Positive Fixed
Number of Regulators	1
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature Range	-40°C to 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LP3982IMM-2.5 are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

Fixed output voltage of 2.5V
Output current capability of 300mA
Maximum input voltage of 6V
Dropout voltage of 0.22V at 200mA
Quiescent current of 270 µA
Positive fixed output configuration with single regulator
Enable control feature and identical protection features (over-current, over-temperature, reverse polarity)
Operating temperature range of -40°C to 85°C
8-TSSOP/8-MSOP package with 0.118" (3.00mm) width
Surface mount technology

Parts meeting all these parameters are classified as direct equivalents or parametric equivalents based on their relationship to the base product number LP3982.

Parameter Comparison

Parameter	LP3982IMM-2.5	LP3982IMM-2.5/NOPB	LP3982IMMX-2.5/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	2.5V	2.5V	2.5V
Output Current	300mA	300mA	300mA
Input Voltage (Max)	6V	6V	6V
Dropout Voltage (Max)	0.22V @ 200mA	0.22V @ 200mA	0.22V @ 200mA
Quiescent Current	270 µA	270 µA	270 µA
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 to 85°C	-40°C to 85°C	-40°C to 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
Packaging	Not specified	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The LP3982IMM-2.5/NOPB and LP3982IMMX-2.5/NOPB are the primary substitutes for the obsolete LP3982IMM-2.5. Both parts maintain identical electrical and mechanical specifications while offering improved product status and regulatory compliance.

LP3982IMM-2.5/NOPB is classified as a direct manufacturer equivalent with Active product status and ROHS3 compliance. This part is supplied in Tape & Reel packaging and represents the standard replacement path for the obsolete variant.

LP3982IMMX-2.5/NOPB is classified as a parametric equivalent, also with Active product status and ROHS3 compliance. This variant is likewise supplied in Tape & Reel packaging and provides identical functional and electrical characteristics.

Both substitute parts eliminate the RoHS non-compliance issue present in the original LP3982IMM-2.5 and ensure continued availability through active product lines. Selection between the two substitutes should be based on supplier availability and internal part numbering conventions, as electrical performance and package specifications are identical.

Frequently Asked Questions (FAQ)

Q: Can LP3982IMM-2.5/NOPB and LP3982IMMX-2.5/NOPB be used interchangeably with the LP3982IMM-2.5?

A: Yes. Both substitute parts meet all electrical and mechanical parameters of the original part, including output voltage, current rating, dropout voltage, protection features, operating temperature range, and package specifications. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between LP3982IMM-2.5/NOPB and LP3982IMMX-2.5/NOPB?

A: Both parts share identical electrical specifications and package configurations. The difference lies in their designation within the Texas Instruments product line. LP3982IMM-2.5/NOPB is the direct equivalent, while LP3982IMMX-2.5/NOPB is the parametric equivalent. Both are Active products with ROHS3 compliance and Tape & Reel packaging.

Q: Why is the original LP3982IMM-2.5 marked as Obsolete?

A: The LP3982IMM-2.5 has reached end-of-life status. The substitute parts LP3982IMM-2.5/NOPB and LP3982IMMX-2.5/NOPB are the recommended Active alternatives that maintain full functional and electrical compatibility.

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use the 8-TSSOP/8-MSOP package with 0.118" (3.00mm) width and are surface mount devices. Pinout and package dimensions are identical, allowing direct board-level substitution.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" suffix indicates that the part is supplied without plumbum (lead-free). This designation is associated with RoHS compliance and environmental regulations.

Q: Does switching to a substitute part require design changes?

A: No design changes are required. The substitute parts are pin-compatible and functionally equivalent, supporting direct replacement in existing designs.

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