LP2989IMMX-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IMMX-5.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output at 500mA. This device operates across an input voltage range up to 16V with a maximum dropout voltage of 0.65V at full load current. The part is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring 5V regulated power delivery in space-constrained surface mount implementations.

Substiute Parts

LP2989IMMX-5.0/NOPB

Texas InstrumentsIn Stock: 5627LP2989IMMX-5.0/NOPB Datasheet

Current PartRFQ

TPS7A2650DRVR

Texas InstrumentsIn Stock: 17467TPS7A2650DRVR Datasheet

MFR RecommendedRFQ

LP2989AIMM-5.0/NOPB

Texas InstrumentsIn Stock: 5978LP2989AIMM-5.0/NOPB Datasheet

Parametric EquivalentRFQ

LP2989AIMMX-5.0/NOPB

Texas InstrumentsIn Stock: 1074LP2989AIMMX-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2989IMMX-5.0/NOPB is determined by the following critical parameters: fixed 5V output voltage, 500mA output current capability, positive output configuration, surface mount mounting type, and compliance certifications (ROHS3, REACH Unaffected, EAR99).

Substitute parts are grouped into two categories:

Parametric Equivalents (Same Package Family): LP2989AIMM-5.0/NOPB and LP2989AIMMX-5.0/NOPB maintain identical electrical specifications and the same 8-VSSOP package. These differ only in packaging format (Cut Tape vs. Tape & Reel) and product status. Parametric equivalents provide direct functional replacement with no design modifications required.

Manufacturer Recommended Substitute (Enhanced Performance): TPS7A2650DRVR offers superior electrical characteristics including lower dropout voltage (0.33V vs. 0.65V), significantly lower quiescent current (4.5 µA vs. 175 µA), and higher input voltage rating (18V vs. 16V). This part operates in Active product status with extended feature set including Power Good output and UVLO protection. The package differs (6-WSON vs. 8-VSSOP), requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification): Select LP2989AIMMX-5.0/NOPB. This part maintains identical electrical performance and package footprint while offering Active product status, ensuring long-term availability. Current inventory of 973 pieces supports production requirements.

For Packaging Format Flexibility: LP2989AIMM-5.0/NOPB provides the same electrical and package specifications in Cut Tape format, suitable for lower-volume or prototype applications. Inventory of 5900 pieces is available.

For Enhanced Performance and Extended Availability: Select TPS7A2650DRVR when design modifications are feasible. This Active-status part delivers superior power efficiency through 75% reduction in dropout voltage and 96% reduction in quiescent current, resulting in lower thermal dissipation and extended battery life in portable applications. The 6-WSON package occupies 44% less board area than 8-VSSOP. Higher input voltage rating (18V) accommodates broader supply ranges. Inventory of 17400 pieces ensures sustained supply. PCB layout redesign is required due to package change.

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 classification, ensuring regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can LP2989AIMM-5.0/NOPB and LP2989AIMMX-5.0/NOPB be used interchangeably with LP2989IMMX-5.0/NOPB?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output voltage, current rating, and 8-VSSOP package. The difference is packaging format: LP2989AIMM-5.0/NOPB is supplied in Cut Tape, while LP2989AIMMX-5.0/NOPB is supplied in Tape & Reel. No circuit modifications are required. PCB footprints are identical.

Q: What are the key differences between the LP2989 series and TPS7A2650DRVR?

A: Both deliver 5V at 500mA with identical output configuration and operating temperature range. TPS7A2650DRVR offers superior performance: dropout voltage is reduced from 0.65V to 0.33V, quiescent current drops from 175 µA to 4.5 µA, and maximum input voltage increases from 16V to 18V. TPS7A2650DRVR includes Power Good output and UVLO protection. The package differs: TPS7A2650DRVR uses 6-WSON (2x2) versus 8-VSSOP for LP2989 variants.

Q: Does TPS7A2650DRVR require PCB redesign?

A: Yes. The 6-WSON (2x2) package has a different footprint than 8-VSSOP. PCB layout modification is necessary, including trace routing and thermal pad design. Schematic connections remain compatible.

Q: Why is LP2989IMMX-5.0/NOPB marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued this part number. Existing inventory is available, but future production is not planned. LP2989AIMMX-5.0/NOPB (Active status) or TPS7A2650DRVR (Active status) are recommended for new designs to ensure long-term supply availability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. LP2989AIMM-5.0/NOPB, LP2989AIMMX-5.0/NOPB, and TPS7A2650DRVR are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are REACH Unaffected and classified as EAR99.

Q: Which substitute offers the best power efficiency?

A: TPS7A2650DRVR provides superior efficiency through significantly lower dropout voltage (0.33V vs. 0.65V) and quiescent current (4.5 µA vs. 175 µA). In battery-powered or thermally constrained applications, this translates to reduced power dissipation and extended operating time.