LP2989IMM-2.8 Equivalent & Substitute Parts

Part Overview

The LP2989IMM-2.8 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 2.8V at 500mA with a maximum dropout voltage of 0.65V. The part is currently marked as obsolete, which necessitates identification of active equivalent alternatives for ongoing design support and procurement.

Substiute Parts

LP2989IMM-2.8

Texas InstrumentsIn Stock: 6852LP2989IMM-2.8 Datasheet

Current PartRFQ

LP2989IMM-2.8/NOPB

Texas InstrumentsIn Stock: 818LP2989IMM-2.8/NOPB Datasheet

Parametric EquivalentRFQ

LP2989IMMX-2.8/NOPB

Texas InstrumentsIn Stock: 759LP2989IMMX-2.8/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989IMM-2.8 are identified based on strict parametric equivalence. The following criteria determine substitutability:

• Fixed output voltage of 2.8V
• Output current rating of 500mA
• Maximum input voltage of 16V
• Dropout voltage specification of 0.65V @ 500mA
• Quiescent current of 175 µA
• PSRR of 60dB (1kHz)
• Operating temperature range of -40°C ~ 125°C
• 8-VSSOP package configuration
• Identical protection features (Over Current, Over Temperature, Short Circuit)
• Enable control feature

All identified substitutes maintain these electrical and mechanical parameters without deviation. Packaging variations (Tape & Reel vs. Cut Tape & Digi-Reel) do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both LP2989IMM-2.8/NOPB and LP2989IMMX-2.8/NOPB are active product alternatives to the obsolete LP2989IMM-2.8. The primary differentiators are product status and regulatory compliance:

LP2989IMM-2.8/NOPB is the direct parametric equivalent with ROHS3 compliance and Tape & Reel packaging, suitable for standard production environments requiring compliant components.

LP2989IMMX-2.8/NOPB provides identical electrical performance with ROHS3 compliance and offers Cut Tape & Digi-Reel packaging options, accommodating varied procurement and assembly workflows.

Selection between these substitutes depends on packaging and supply chain requirements rather than electrical performance, as both maintain complete parametric equivalence to the original part.

Frequently Asked Questions (FAQ)

Q: Can LP2989IMM-2.8/NOPB directly replace LP2989IMM-2.8 in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What is the difference between LP2989IMM-2.8/NOPB and LP2989IMMX-2.8/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications. The difference lies in packaging format: LP2989IMM-2.8/NOPB is supplied in Tape & Reel format, while LP2989IMMX-2.8/NOPB is available in Cut Tape & Digi-Reel format. Selection depends on assembly and procurement preferences.

Q: Are there any pin configuration differences between these parts?

A: No. All three parts use the 8-VSSOP package with identical pinout and mechanical dimensions (0.118" / 3.00mm width). Direct PCB footprint compatibility is maintained.

Q: Does the /NOPB suffix affect functionality?

A: No. The /NOPB designation indicates lead-free and RoHS-compliant manufacturing. Electrical and functional performance remains unchanged.

Q: What is the significance of the obsolete status for LP2989IMM-2.8?

A: Obsolete status indicates the part is no longer manufactured or supported by Texas Instruments. Active alternatives (LP2989IMM-2.8/NOPB and LP2989IMMX-2.8/NOPB) should be used for new designs and ongoing procurement to ensure long-term supply availability and manufacturer support.