LP2989AIMMX-3.3 Equivalent & Substitute Parts

Part Overview

The LP2989AIMMX-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 500mA output current at a fixed 3.3V output with a maximum dropout voltage of 0.65V at full load. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

LP2989AIMMX-3.3

Texas InstrumentsIn Stock: 2386LP2989AIMMX-3.3 Datasheet

Current PartRFQ

LP2989IMM-3.3/NOPB

Texas InstrumentsIn Stock: 2106LP2989IMM-3.3/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2989AIMMX-3.3 is determined by strict equivalence across the following critical parameters:

• Output voltage fixed at 3.3V
• Output current capability of 500mA minimum
• Maximum input voltage of 16V or greater
• Dropout voltage specification of 0.65V @ 500mA or lower
• Package compatibility: 8-VSSOP or equivalent footprint
• Operating temperature range: -40°C to 125°C minimum
• Protection features: Over Current, Over Temperature, Short Circuit
• Enable control feature availability

The LP2989IMM-3.3/NOPB meets all these criteria as a parametric equivalent, with identical electrical specifications and package footprint. The primary distinction is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

The LP2989IMM-3.3/NOPB is a direct parametric equivalent to the LP2989AIMMX-3.3 for all electrical and thermal specifications. Selection between these parts should be based on:

Product Status Consideration: Both parts are classified as obsolete. For new designs or long-term production requirements, evaluation of current-generation alternatives from Texas Instruments or other manufacturers meeting the same electrical specifications is advised.

Compliance Status: The LP2989IMM-3.3/NOPB carries ROHS3 compliance certification, whereas the LP2989AIMMX-3.3 is RoHS non-compliant. Applications subject to RoHS regulatory requirements should prioritize the compliant variant.

Packaging and Supply Chain: The LP2989AIMMX-3.3 is supplied in Tape & Reel format, while the LP2989IMM-3.3/NOPB is available in Cut Tape and Digi-Reel formats. Packaging selection depends on procurement volume and assembly line requirements.

Electrical Interchangeability: Both parts are electrically and thermally interchangeable within the specified operating parameters. No circuit modifications are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can LP2989IMM-3.3/NOPB be used as a direct replacement for LP2989AIMMX-3.3?

A: Yes. Both parts are parametrically equivalent with identical output voltage (3.3V), output current (500mA), dropout voltage (0.65V @ 500mA), and package footprint (8-VSSOP). No circuit modifications are necessary.

Q: What is the difference between these two part numbers?

A: The primary differences are packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and RoHS compliance status (non-compliant versus ROHS3 compliant). All electrical and thermal specifications are identical.

Q: Are both parts still in production?

A: Both parts are classified as obsolete. Current inventory availability varies by distributor. For new designs, current-generation linear regulators with equivalent specifications should be evaluated.

Q: Does the package footprint remain the same between these parts?

A: Yes. Both parts use the 8-VSSOP package (8-TSSOP, 8-MSOP with 0.118" width, 3.00mm). PCB layouts and footprints are directly compatible.

Q: What are the critical parameters for substitution?

A: Substitution is valid when the following parameters match or exceed the original specification: fixed output voltage of 3.3V, output current of 500mA, maximum input voltage of 16V, dropout voltage of 0.65V @ 500mA, 8-VSSOP package, and operating temperature range of -40°C to 125°C.

Q: Is RoHS compliance a functional difference?

A: No. RoHS compliance is a regulatory and material composition requirement, not a functional electrical specification. Both parts operate identically in circuit applications. Selection depends on regulatory requirements applicable to the end application.