LP2989AIMX-1.8 Equivalent & Substitute Parts Reference

Part Overview

LP2989AIMX-1.8 is a linear voltage regulator IC manufactured by Texas Instruments within the Power Management (PMIC) category. It delivers a fixed positive voltage output of 1.8V with a maximum output current of 500mA and features an 8-SOIC surface-mount package. The part is classified as obsolete, which necessitates identifying parametric equivalent substitutes to maintain supply continuity and design compatibility.

Substiute Parts

LP2989AIMX-1.8

Texas InstrumentsIn Stock: 4744LP2989AIMX-1.8 Datasheet

Current PartRFQ

LP2989AIMX-1.8/NOPB

National SemiconductorIn Stock: 3170LP2989AIMX-1.8/NOPB Datasheet

Parametric EquivalentRFQ

LP2989IMX-1.8/NOPB

Texas InstrumentsIn Stock: 2146LP2989IMX-1.8/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is determined based on strict matching of the following key electrical and mechanical parameters: output configuration, output type, number of regulators, fixed output voltage (1.8V), maximum dropout voltage (0.65V @ 500mA), maximum output current (500mA), maximum input voltage (16V), quiescent current, supply current, PSRR, control features, protection features, operating temperature range, mounting type, and package/case. Only parts meeting all listed criteria can be considered parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

The main part, LP2989AIMX-1.8, is obsolete. Both LP2989AIMX-1.8/NOPB and LP2989IMX-1.8/NOPB are classified as active products and provide full parametric equivalence, ensuring direct substitution compatibility. For RoHS compliance requirements, LP2989IMX-1.8/NOPB is ROHS3 compliant, while LP2989AIMX-1.8 and LP2989AIMX-1.8/NOPB are designated as RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q1: What are the critical matching parameters when substituting LP2989AIMX-1.8 in Power Management (PMIC) applications?
A1: Key parameters for direct substitution include output voltage (1.8V), output current (500mA), dropout voltage (0.65V @ 500mA), input voltage (up to 16V), operational temperature range (-40°C ~ 125°C), mounting type (surface mount), and package/case (8-SOIC). All substitutes must match these specifications.

Q2: Are the packages of the listed substitutes identical for footprint compatibility?
A2: All options use the 8-SOIC (0.154", 3.90mm Width) surface-mount package and are mechanically compatible.

Q3: Is there RoHS-compliant substitute availability for LP2989AIMX-1.8?
A3: LP2989IMX-1.8/NOPB is ROHS3 compliant; LP2989AIMX-1.8 and LP2989AIMX-1.8/NOPB are RoHS non-compliant.

Q4: Are control and protection features preserved in the suggested substitute parts?
A4: All listed substitutes provide Enable control and include over-current, over-temperature, and short-circuit protection features, preserving the functional integrity of the design.