LP2989IMX-5.0 Equivalent & Substitute Parts

Part Overview

The LP2989IMX-5.0 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 5V output at 500mA with a maximum dropout voltage of 0.65V. The device integrates over-current, over-temperature, and short-circuit protection, making it suitable for low-noise power supply applications requiring micropower operation.

The LP2989IMX-5.0 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support legacy system maintenance or redesigns requiring compatible alternatives.

Substiute Parts

LP2989IMX-5.0

Texas InstrumentsIn Stock: 3214LP2989IMX-5.0 Datasheet

Current PartRFQ

LP2989AIMX-5.0/NOPB

Texas InstrumentsIn Stock: 819LP2989AIMX-5.0/NOPB Datasheet

Parametric EquivalentRFQ

LP2989IMX-5.0/NOPB

National SemiconductorIn Stock: 4912LP2989IMX-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989IMX-5.0 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Output voltage: 5V fixed
• Output current capability: 500mA
• Maximum input voltage: 16V
• Package type: 8-SOIC form factor
• Mounting type: Surface Mount
• Protection features: Over-current, over-temperature, short-circuit protection
• Control features: Enable function
• Operating temperature range: -40°C ~ 125°C

Identified Substitute Parts:

1. LP2989AIMX-5.0/NOPB (Texas Instruments) – Parametric equivalent with identical electrical specifications and packaging. Differs in product status (obsolete vs. active consideration) and RoHS compliance status.

2. LP2989IMX-5.0/NOPB (National Semiconductor) – Parametric equivalent with identical electrical specifications, packaging, and performance characteristics. Listed as active product status.

Parameter Comparison

Engineering Selection Recommendations

LP2989AIMX-5.0/NOPB is a direct parametric equivalent suitable for applications where RoHS3 compliance is required. All electrical and mechanical specifications match the original LP2989IMX-5.0. The part is listed as obsolete but maintains full functional compatibility. Selection of this variant is appropriate when regulatory compliance with RoHS3 standards is a design requirement.

LP2989IMX-5.0/NOPB is a direct parametric equivalent with active product status from National Semiconductor. All electrical and mechanical specifications are identical to the original part. This variant offers improved supply chain availability due to its active status and is suitable for new designs or legacy system support where long-term component availability is a consideration.

Both substitute parts maintain identical electrical performance, protection features, and thermal operating ranges. Selection between them should be based on supply chain availability, compliance requirements, and design timeline considerations.

Frequently Asked Questions (FAQ)

Q: Can LP2989AIMX-5.0/NOPB be used as a direct replacement for LP2989IMX-5.0?

A: Yes. Both parts are parametric equivalents with identical output voltage (5V), output current (500mA), dropout voltage (0.65V @ 500mA), quiescent current (175 µA), PSRR (60dB @ 1kHz), and 8-SOIC packaging. All protection features and control functions are identical. The primary difference is RoHS3 compliance status.

Q: What is the difference between LP2989IMX-5.0/NOPB and the original LP2989IMX-5.0?

A: Both parts share identical electrical specifications and packaging. The LP2989IMX-5.0/NOPB is manufactured by National Semiconductor and maintains active product status, whereas the original is listed as obsolete. Electrical performance and pin compatibility are equivalent.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 8-SOIC package with identical pinout and electrical characteristics. Direct PCB substitution is possible without circuit modification.

Q: Which substitute should be selected for new designs?

A: LP2989IMX-5.0/NOPB is recommended for new designs due to its active product status, ensuring long-term supply chain availability and support.

Q: What are the key parameters that must match for substitution?

A: Output voltage (5V), output current (500mA), input voltage rating (16V max), dropout voltage (0.65V @ 500mA), package type (8-SOIC), and protection features (over-current, over-temperature, short-circuit) must remain constant for functional equivalence.

Q: Is RoHS compliance a factor in selecting a substitute?

A: RoHS compliance is a regulatory consideration dependent on application and market requirements. LP2989AIMX-5.0/NOPB is ROHS3 compliant, while the original LP2989IMX-5.0 is non-compliant. Selection should align with applicable regulatory standards for the target application.