LP2989AIMMX-2.5 Equivalent & Substitute Parts

Part Overview

The LP2989AIMMX-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 500mA output current with a fixed 2.5V output and operates across an input voltage range up to 16V. The device integrates over-current, over-temperature, and short-circuit protection features, making it suitable for low-noise power management applications requiring micropower operation.

The LP2989AIMMX-2.5 is classified as obsolete. Identifying equivalent substitute parts is essential for design continuity, procurement flexibility, and long-term product support when the original part becomes unavailable.

Substiute Parts

LP2989AIMMX-2.5

Texas InstrumentsIn Stock: 4994LP2989AIMMX-2.5 Datasheet

Current PartRFQ

LP2989AIMM-2.5/NOPB

National SemiconductorIn Stock: 2010LP2989AIMM-2.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989AIMMX-2.5 are identified based on strict parametric equivalence across the following critical criteria:

• Fixed output voltage of 2.5V
• Maximum input voltage of 16V
• Output current capability of 500mA
• Dropout voltage of 0.65V @ 500mA
• Quiescent current of 175 µA
• PSRR of 60dB (1kHz)
• Identical protection features (Over Current, Over Temperature, Short Circuit)
• Operating temperature range of -40°C ~ 125°C
• Surface mount package in 8-TSSOP/8-MSOP form factor

The LP2989AIMM-2.5/NOPB meets all these parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The LP2989AIMM-2.5/NOPB is the primary substitute for the obsolete LP2989AIMMX-2.5. The substitute part maintains active product status with the same manufacturer lineage (National Semiconductor, now part of Texas Instruments), ensuring continued availability and support.

Both parts share identical electrical specifications, protection mechanisms, and thermal operating ranges. The substitute part is supplied in bulk packaging, whereas the original part specification does not indicate packaging type. Both parts comply with EAR99 export classification and HTSUS tariff code 8542.39.0001.

The transition from the obsolete LP2989AIMMX-2.5 to the active LP2989AIMM-2.5/NOPB requires no circuit redesign, as all functional and electrical parameters are equivalent. PCB layout and thermal management considerations remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the LP2989AIMM-2.5/NOPB be used as a direct replacement for the LP2989AIMMX-2.5?

A: Yes. Both parts are parametrically equivalent across all critical electrical specifications, including output voltage, current capacity, dropout voltage, quiescent current, PSRR, protection features, and operating temperature range. The package form factor and mounting type are identical.

Q: What is the difference between the LP2989AIMMX-2.5 and LP2989AIMM-2.5/NOPB?

A: The primary difference is product status. The LP2989AIMMX-2.5 is obsolete, while the LP2989AIMM-2.5/NOPB is active. The substitute part is supplied in bulk packaging. All electrical and functional parameters are identical.

Q: Are there any compliance or certification differences between these parts?

A: Both parts share the same ECCN classification (EAR99) and HTSUS tariff code (8542.39.0001). No compliance or certification differences exist between the two parts.

Q: Does the package form factor remain the same?

A: Yes. Both the LP2989AIMMX-2.5 and LP2989AIMM-2.5/NOPB use the 8-TSSOP/8-MSOP package with 0.118" width (3.00mm). Surface mount assembly processes and PCB footprints are compatible.

Q: What inventory status should be considered when selecting between these parts?

A: The LP2989AIMMX-2.5 has 4965 pieces in stock as new original inventory. The LP2989AIMM-2.5/NOPB has 1977 pieces in stock as new original inventory. Availability may vary by supplier and region.