LP2989IM-3.0 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2989IM-3.0 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, which necessitates identification of equivalent and substitute components for new designs and ongoing production requirements. Active alternatives with identical electrical and mechanical specifications are available to ensure design continuity and supply chain reliability.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	500mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.65V @ 500mA
Quiescent Current	175 µA
PSRR	60dB (1kHz)
Operating Temperature Range	-40°C ~ 125°C
Package	8-SOIC (0.154", 3.90mm Width)
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution of the LP2989IM-3.0 is determined by strict equivalence across the following critical parameters:

Output voltage configuration: Positive fixed 3V output
Output current capability: 500mA minimum
Input voltage rating: 16V maximum
Voltage dropout specification: 0.65V @ 500mA maximum
Package type: 8-SOIC surface mount
Protection and control features: Over current, over temperature, short circuit protection with enable control
Operating temperature range: -40°C to 125°C

Two substitute parts meet these criteria: LP2989IM-3.0/NOPB (direct manufacturer equivalent with active product status) and LP2989AIM-3.0/NOPB (parametric equivalent with active product status). Both maintain identical electrical performance and mechanical compatibility with the obsolete LP2989IM-3.0.

Parameter Comparison

Parameter	LP2989IM-3.0	LP2989IM-3.0/NOPB	LP2989AIM-3.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Voltage	3V	3V	3V
Output Current	500mA	500mA	500mA
Input Voltage (Max)	16V	16V	16V
Voltage Dropout (Max)	0.65V @ 500mA	0.65V @ 500mA	0.65V @ 500mA
Quiescent Current	175 µA	175 µA	175 µA
PSRR	60dB (1kHz)	60dB (1kHz)	60dB (1kHz)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	8-SOIC	8-SOIC	8-SOIC
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Control Features	Enable	Enable	Enable
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Not specified	Tube	Tube

Engineering Selection Recommendations

Both LP2989IM-3.0/NOPB and LP2989AIM-3.0/NOPB are suitable direct replacements for the obsolete LP2989IM-3.0 based on identical electrical specifications and package compatibility.

LP2989IM-3.0/NOPB is the direct manufacturer equivalent, maintaining the same base product designation with NOPB (No Plumbum/Lead-Free) packaging designation and active product status.

LP2989AIM-3.0/NOPB is a parametric equivalent offering identical performance characteristics with active product status. Both parts carry ROHS3 compliance, addressing regulatory requirements that the original obsolete part does not meet.

Selection between these two substitutes should be based on availability, supply chain logistics, and internal component qualification procedures. Both parts are electrically and mechanically interchangeable with the LP2989IM-3.0.

Frequently Asked Questions (FAQ)

Q: Can LP2989IM-3.0/NOPB and LP2989AIM-3.0/NOPB be used interchangeably with LP2989IM-3.0?

A: Yes. Both substitute parts maintain identical electrical specifications including output voltage, current rating, dropout voltage, quiescent current, and PSRR. The 8-SOIC package dimensions are identical, ensuring mechanical compatibility on existing PCB layouts.

Q: What is the difference between LP2989IM-3.0/NOPB and LP2989AIM-3.0/NOPB?

A: Both parts are parametrically equivalent with identical electrical performance. The primary difference is the base product designation (IM versus AIM). Both are active products with ROHS3 compliance and tube packaging.

Q: Why is the original LP2989IM-3.0 marked as obsolete?

A: Product obsolescence reflects Texas Instruments' end-of-life decisions for legacy components. Active equivalent parts with superior compliance certifications (ROHS3) are available as direct replacements.

Q: Are there any compliance differences between the obsolete part and substitutes?

A: Yes. The original LP2989IM-3.0 is RoHS non-compliant, while both LP2989IM-3.0/NOPB and LP2989AIM-3.0/NOPB are ROHS3 compliant. Both substitutes are REACH unaffected and carry identical ECCN and HTSUS classifications.

Q: What packaging formats are available for the substitute parts?

A: Both LP2989IM-3.0/NOPB and LP2989AIM-3.0/NOPB are supplied in tube packaging, suitable for automated assembly processes.

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