LP2989IMMX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IMMX-3.3/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications with 500mA current capacity. This device operates in the 8-VSSOP package and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for ongoing design support, production continuity, and component sourcing. Substitute parts must maintain electrical compatibility across critical parameters including output voltage, current capacity, dropout voltage, and thermal characteristics while accommodating available packaging options.

Substiute Parts

LP2989IMMX-3.3/NOPB

Texas InstrumentsIn Stock: 1990LP2989IMMX-3.3/NOPB Datasheet

Current PartRFQ

LP2989IMM-3.3/NOPB

Texas InstrumentsIn Stock: 2106LP2989IMM-3.3/NOPB Datasheet

Parametric EquivalentRFQ

MIC5219-3.3YMM-TR

Microchip TechnologyIn Stock: 23538MIC5219-3.3YMM-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989IMMX-3.3/NOPB are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

• Fixed 3.3V output voltage configuration
• 500mA output current capability
• Maximum input voltage rating of 12V or higher
• Dropout voltage performance at rated current
• 8-pin surface mount package (VSSOP or MSOP variants)
• Operating temperature range of -40°C to 125°C
• Compliance with RoHS3 and REACH standards

Two substitute parts meet these criteria: the LP2989IMM-3.3/NOPB (parametric equivalent from Texas Instruments) and the MIC5219-3.3YMM-TR (manufacturer-recommended alternative from Microchip Technology). Both devices provide identical output voltage and current specifications with compatible package footprints suitable for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

The LP2989IMM-3.3/NOPB serves as a direct parametric equivalent, offering identical electrical specifications and package compatibility. However, this part shares obsolete status with the main device, limiting long-term availability.

The MIC5219-3.3YMM-TR is the preferred substitute for new designs and ongoing production. This device maintains active product status, ensuring sustained component availability and manufacturing support. The MIC5219 demonstrates superior performance characteristics including lower quiescent current (8 µA versus 175 µA), improved PSRR (75dB at 120Hz versus 60dB at 1kHz), and equivalent dropout voltage performance. The maximum input voltage specification of 12V accommodates standard power supply designs while remaining compatible with the 16V rating of the original part in typical applications. Both substitute parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the LP2989IMM-3.3/NOPB be used as a direct replacement for the LP2989IMMX-3.3/NOPB?

A: Yes. Both parts are Texas Instruments LP2989 variants with identical electrical specifications, output voltage, current capacity, and thermal characteristics. The primary difference is packaging format (Cut Tape & Digi-Reel versus standard packaging). Electrical performance and board-level compatibility are equivalent.

Q: What are the key differences between the LP2989 and MIC5219-3.3YMM-TR?

A: Both devices deliver 3.3V at 500mA with compatible 8-pin surface mount packages. The MIC5219 offers lower quiescent current consumption (8 µA versus 175 µA), higher PSRR performance (75dB versus 60dB), and active product status. The MIC5219 maximum input voltage is 12V compared to 16V for the LP2989, which is suitable for standard regulated power supplies.

Q: Are the 8-VSSOP and 8-MSOP packages pin-compatible?

A: Both packages are 8-pin surface mount variants with 0.118" width and 3.00mm pitch. Pin configurations for voltage regulator ICs in these packages are standardized for this device category. Verify specific pinout diagrams for your application, as package variants may have minor footprint differences.

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

A: The MIC5219-3.3YMM-TR is recommended for new designs due to active product status, superior quiescent current performance, and sustained manufacturing availability. This selection ensures long-term component sourcing and design support.

Q: Do all three parts meet current regulatory compliance requirements?

A: Yes. The LP2989IMMX-3.3/NOPB, LP2989IMM-3.3/NOPB, and MIC5219-3.3YMM-TR are all ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and distribution.