LP2989IMMX-2.8 Equivalent & Substitute Parts

Part Overview

The LP2989IMMX-2.8 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 2.8V at 500mA with a maximum dropout voltage of 0.65V. The part is currently marked as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

LP2989IMMX-2.8

Texas InstrumentsIn Stock: 6810LP2989IMMX-2.8 Datasheet

Current PartRFQ

LP2989IMM-2.8/NOPB

Texas InstrumentsIn Stock: 818LP2989IMM-2.8/NOPB Datasheet

Parametric EquivalentRFQ

LP2989IMMX-2.8/NOPB

Texas InstrumentsIn Stock: 759LP2989IMMX-2.8/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2989IMMX-2.8 is determined by strict equivalence across the following critical parameters:

• Output voltage: 2.8V fixed
• Maximum output current: 500mA
• Maximum input voltage: 16V
• Dropout voltage: 0.65V @ 500mA
• Package type: 8-VSSOP
• Mounting type: Surface Mount
• Control and protection features: Enable, Over Current, Over Temperature, Short Circuit

The identified substitute parts maintain identical electrical specifications and physical packaging. Differences exist only in product status (active vs. obsolete) and packaging format (Tape & Reel vs. Cut Tape & Digi-Reel).

Parameter Comparison

Engineering Selection Recommendations

Both LP2989IMM-2.8/NOPB and LP2989IMMX-2.8/NOPB are direct functional equivalents to the obsolete LP2989IMMX-2.8. Selection between these active alternatives should be based on the following factors:

Product Status: Both substitute parts carry Active status, ensuring continued availability and manufacturing support from Texas Instruments.

Compliance: Both substitute parts are ROHS3 compliant, whereas the original part is RoHS non-compliant. This compliance improvement is significant for applications subject to environmental regulations.

Packaging Format: LP2989IMM-2.8/NOPB is supplied in Tape & Reel format, suitable for high-volume automated assembly. LP2989IMMX-2.8/NOPB is supplied in Cut Tape & Digi-Reel format, offering flexibility for mixed-volume procurement and manual assembly operations.

Electrical Equivalence: All three parts are electrically identical across all specified parameters, including output voltage, current rating, dropout voltage, quiescent current, and protection features.

Frequently Asked Questions (FAQ)

Q: Can LP2989IMM-2.8/NOPB and LP2989IMMX-2.8/NOPB be used interchangeably with the original LP2989IMMX-2.8?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and physical packaging (8-VSSOP). The differences are product status (active vs. obsolete) and packaging format (Tape & Reel vs. Cut Tape & Digi-Reel). Pin configuration and functional behavior are identical.

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

A: The /NOPB suffix indicates that the part is supplied without lead (Pb), confirming RoHS3 compliance. This is a standard Texas Instruments designation for lead-free versions.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affects only procurement and assembly logistics, not electrical performance or functionality.

Q: Why is the original LP2989IMMX-2.8 marked as obsolete?

A: Product obsolescence is determined by the manufacturer based on market demand and product lifecycle decisions. The active equivalents LP2989IMM-2.8/NOPB and LP2989IMMX-2.8/NOPB provide continued access to this functionality.

Q: Are there any differences in operating temperature range?

A: No. All three parts operate across the identical temperature range of -40°C to 125°C.

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

A: For new designs, either LP2989IMM-2.8/NOPB or LP2989IMMX-2.8/NOPB is appropriate. Selection depends on procurement volume and assembly process requirements. Both are active, ROHS3 compliant, and electrically equivalent.