LP3981IMM-2.7 Equivalent & Substitute Parts

Part Overview

The LP3981IMM-2.7 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 300mA output current at a fixed 2.7V output with a maximum dropout voltage of 0.2V. The part is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

LP3981IMM-2.7

Texas InstrumentsIn Stock: 16183LP3981IMM-2.7 Datasheet

Current PartRFQ

LP3981IMM-2.7/NOPB

Texas InstrumentsIn Stock: 959LP3981IMM-2.7/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP3981IMM-2.7 is determined by the following critical parameters:

• Output voltage specification: 2.7V fixed
• Maximum output current: 300mA
• Maximum input voltage: 6V
• Maximum dropout voltage: 0.2V @ 300mA
• Package type: 8-VSSOP (8-TSSOP, 8-MSOP equivalent)
• Surface mount configuration
• Operating temperature range: -40°C ~ 125°C
• Protection features: Over Current, Over Temperature, Short Circuit
• Control feature: Enable

The LP3981IMM-2.7/NOPB is a parametric equivalent that maintains all electrical and mechanical specifications while offering active product status and improved compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The LP3981IMM-2.7/NOPB is the direct parametric equivalent for the obsolete LP3981IMM-2.7. Both parts share identical electrical specifications and mechanical packaging. The primary distinctions are product status and compliance certification.

The LP3981IMM-2.7/NOPB offers active product status from Texas Instruments, ensuring continued availability and manufacturing support. This part also carries ROHS3 compliance certification, whereas the original LP3981IMM-2.7 is RoHS non-compliant. The /NOPB variant is supplied in Tape & Reel packaging, suitable for automated assembly processes.

For new designs or production continuity, the LP3981IMM-2.7/NOPB is the appropriate selection. Existing designs using the LP3981IMM-2.7 can transition to this equivalent without circuit modification, provided that RoHS compliance requirements are met.

Frequently Asked Questions (FAQ)

Q: Can the LP3981IMM-2.7/NOPB directly replace the LP3981IMM-2.7 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LP3981IMM-2.7/NOPB maintains the same output voltage (2.7V), output current (300mA), dropout voltage (0.2V @ 300mA), and package configuration (8-VSSOP). No circuit modifications are required.

Q: What is the difference between LP3981IMM-2.7 and LP3981IMM-2.7/NOPB?

A: The primary differences are product status and compliance. The LP3981IMM-2.7 is obsolete and RoHS non-compliant. The LP3981IMM-2.7/NOPB is active and ROHS3 compliant. Packaging differs: the original is supplied in bulk, while the /NOPB variant uses Tape & Reel format.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts deliver identical electrical performance across all specified parameters, including output voltage, current capacity, dropout voltage, quiescent current, and PSRR characteristics.

Q: What packaging format is the LP3981IMM-2.7/NOPB supplied in?

A: The LP3981IMM-2.7/NOPB is supplied in Tape & Reel (TR) packaging, optimized for automated pick-and-place assembly. The original LP3981IMM-2.7 was supplied in bulk packaging.

Q: Is the 8-VSSOP package compatible with standard surface mount assembly equipment?

A: Yes. The 8-VSSOP package (8-TSSOP, 8-MSOP equivalent) with 0.118" width and 3.00mm body is a standard surface mount package compatible with conventional automated assembly processes.