LP2989AIM-3.0 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP2989AIM-3.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 500mA current capacity. This device is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The LP2989AIM-3.0 operates in the 8-SOIC surface mount package and includes integrated protection features for over-current, over-temperature, and short-circuit conditions.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LP2989AIM-3.0
Category	Power Management (PMIC)
Output Voltage (Fixed)	3V
Output Current	500mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.65V @ 500mA
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LP2989AIM-3.0 are identified based on strict electrical and mechanical parameter matching within the linear voltage regulator category. The primary substitution criteria are:

Fixed output voltage of 3V
Output current capacity of 500mA
Maximum input voltage of 16V
Dropout voltage specification of 0.65V @ 500mA
8-SOIC surface mount package configuration
Identical protection feature set (over-current, over-temperature, short-circuit)
Operating temperature range of -40°C ~ 125°C

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

Parameter Comparison

Parameter	LP2989AIM-3.0	LP2989AIM-3.0/NOPB	LP2989IM-3.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	3V	3V	3V
Output Current	500mA	500mA	500mA
Input Voltage (Max)	16V	16V	16V
Dropout Voltage (Max)	0.65V @ 500mA	0.65V @ 500mA	0.65V @ 500mA
Quiescent Current (Iq)	175 µA	175 µA	175 µA
PSRR	60dB (1kHz)	60dB (1kHz)	60dB (1kHz)
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Package Type	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For applications currently using the obsolete LP2989AIM-3.0, both LP2989AIM-3.0/NOPB and LP2989IM-3.0/NOPB are direct substitutes with active product status. The primary distinction between these alternatives is compliance certification:

LP2989AIM-3.0/NOPB is the direct manufacturer equivalent with ROHS3 compliance and active availability. This part maintains the same base product designation and offers the most direct replacement path.

LP2989IM-3.0/NOPB is a parametric equivalent also with ROHS3 compliance and active status. This part shares identical electrical and mechanical specifications and provides an alternative source option.

Both substitute parts eliminate the RoHS non-compliance status of the original LP2989AIM-3.0, making them suitable for applications requiring modern environmental compliance standards. Selection between the two substitutes should be based on procurement availability, packaging preferences (both supplied in Tube packaging), and inventory requirements.

Frequently Asked Questions (FAQ)

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

A: Yes. Both substitute parts maintain identical electrical specifications (3V output, 500mA current, 0.65V dropout voltage, 16V maximum input) and mechanical compatibility (8-SOIC package, surface mount). The primary differences are product status (active vs. obsolete) and RoHS compliance certification.

Q: What is the significance of the "/NOPB" suffix in the part numbers?

A: The "/NOPB" designation indicates "No Plumbum" (lead-free) packaging, reflecting RoHS3 compliance. This is a standard Texas Instruments notation for lead-free variants.

Q: Are there any differences in package dimensions between these parts?

A: No. All three parts use the identical 8-SOIC package configuration with 0.154" width (3.90mm). PCB footprints and assembly processes remain unchanged.

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

A: Both LP2989AIM-3.0/NOPB and LP2989IM-3.0/NOPB are suitable for new designs. Selection should be based on procurement availability and inventory requirements, as both offer active product status and ROHS3 compliance.

Q: Is the quiescent current specification identical across all three parts?

A: Yes. All three parts specify 175 µA quiescent current, ensuring equivalent power consumption characteristics in standby conditions.

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