LP2989IMX-3.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IMX-3.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 500mA current capability in an 8-SOIC surface mount package. This part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing design support and procurement continuity. The device provides integrated protection features including over-current, over-temperature, and short-circuit protection, with an enable control function for power management applications.

Substiute Parts

LP2989IMX-3.0/NOPB

Texas InstrumentsIn Stock: 2584LP2989IMX-3.0/NOPB Datasheet

Current PartRFQ

LP2989AIMX-3.0/NOPB

Texas InstrumentsIn Stock: 2470LP2989AIMX-3.0/NOPB Datasheet

Parametric EquivalentRFQ

MCP1725T-3002E/SN

Microchip TechnologyIn Stock: 1727MCP1725T-3002E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989IMX-3.0/NOPB are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Fixed output voltage of 3V
• Output current rating of 500mA
• 8-SOIC surface mount package (0.154", 3.90mm Width)
• Operating temperature range of -40°C ~ 125°C
• Positive output configuration with fixed output type
• Single regulator configuration
• Enable control feature
• ROHS3 compliance

Substitution Categories:

Parametric Equivalent: LP2989AIMX-3.0/NOPB (Texas Instruments) — Identical electrical specifications and package, with active product status and Tape & Reel packaging option.

Manufacturer Recommended Substitute: MCP1725T-3002E/SN (Microchip Technology) — Meets core output voltage, current, package, and temperature requirements with enhanced protection features and improved dropout voltage performance.

Parameter Comparison

Engineering Selection Recommendations

LP2989AIMX-3.0/NOPB (Primary Equivalent): This part is the direct parametric equivalent with identical electrical specifications and package configuration. It maintains active product status from Texas Instruments, ensuring long-term availability and supply chain stability. Selection of this substitute eliminates design changes while providing access to current manufacturing and quality assurance processes. ROHS3 compliance and identical protection feature set make this the preferred choice for direct replacement in existing designs.

MCP1725T-3002E/SN (Manufacturer Recommended Substitute): This Microchip Technology device meets all core functional requirements with identical 3V output, 500mA current capability, and 8-SOIC package. The part offers enhanced performance characteristics including reduced dropout voltage (0.35V vs. 0.65V) and additional Power Good output functionality. However, the maximum input voltage specification is limited to 6V compared to 16V for the LP2989 series, requiring circuit design verification for applications utilizing higher input voltage ranges. This substitute is suitable for designs where input voltage does not exceed 6V and where the improved dropout voltage performance provides system-level benefits. ROHS3 compliance and active product status support long-term procurement viability.

Frequently Asked Questions (FAQ)

Q: Can LP2989AIMX-3.0/NOPB be used as a direct replacement for LP2989IMX-3.0/NOPB?

A: Yes. The LP2989AIMX-3.0/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current rating, package type, and protection features. The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel vs. bulk). No circuit modifications are required.

Q: What is the key limitation when substituting MCP1725T-3002E/SN for LP2989IMX-3.0/NOPB?

A: The MCP1725T-3002E/SN has a maximum input voltage rating of 6V, whereas the LP2989IMX-3.0/NOPB supports up to 16V input. Applications requiring input voltages above 6V must use the LP2989 series or verify that the circuit design operates within the MCP1725 input voltage specification.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitutes use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and footprints.

Q: Do the substitute parts maintain the same protection features?

A: The LP2989AIMX-3.0/NOPB maintains identical protection features (Over Current, Over Temperature, Short Circuit). The MCP1725T-3002E/SN provides Over Temperature, Short Circuit, and Under Voltage Lockout (UVLO) protection, with no over-current protection but enhanced input voltage monitoring capability.

Q: What is the difference in quiescent current between these parts?

A: The LP2989IMX-3.0/NOPB and LP2989AIMX-3.0/NOPB both draw 175 µA quiescent current. The MCP1725T-3002E/SN draws 220 µA, a difference of 45 µA. For battery-powered or low-power standby applications, this difference may be significant.

Q: Are all parts ROHS3 compliant?

A: Yes. All three parts listed are ROHS3 compliant, meeting environmental and regulatory requirements for commercial and industrial applications.