LP2989IM-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IM-5.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity. This device operates in the 8-SOIC package and features integrated protection mechanisms including over-current, over-temperature, and short-circuit protection. The part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2989IM-5.0/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	500mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.65V @ 500mA
Package Type	8-SOIC
Operating Temperature Range	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LP2989IM-5.0/NOPB is determined by the following critical parameters:

Fixed output voltage of 5V
Output current capacity of 500mA minimum
Positive output configuration
Single regulator output
Operating temperature range of -40°C to 125°C
Surface mount technology
RoHS3 compliance

Two substitute parts meet these criteria:

LP2989AIM-5.0/NOPB (Parametric Equivalent): Maintains identical electrical specifications and 8-SOIC packaging. Differs only in product status (Last Time Buy) and packaging format (Tube vs. original specification).
TPS7A2650DRVR (Manufacturer Recommended): Meets all functional requirements with enhanced performance characteristics. Operates in 6-WSON package with improved dropout voltage and quiescent current specifications.

Parameter Comparison

Parameter	LP2989IM-5.0/NOPB	LP2989AIM-5.0/NOPB	TPS7A2650DRVR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	5V	5V	5V
Output Current	500mA	500mA	500mA
Input Voltage (Max)	16V	16V	18V
Voltage Dropout (Max)	0.65V @ 500mA	0.65V @ 500mA	0.33V @ 500mA
Quiescent Current (Iq)	175 µA	175 µA	4.5 µA
PSRR	60dB (1kHz)	60dB (1kHz)	75dB ~ 52dB (10Hz ~ 1kHz)
Package Type	8-SOIC	8-SOIC	6-WSON (2x2)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C (TJ)
Product Status	Obsolete	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Control Features	Enable	Enable	Enable, Power Good
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, UVLO

Engineering Selection Recommendations

LP2989AIM-5.0/NOPB is the direct parametric equivalent for applications requiring identical electrical and mechanical specifications. This part maintains the 8-SOIC package footprint and all electrical characteristics of the original LP2989IM-5.0/NOPB. However, this part carries Last Time Buy status, indicating limited future availability.

TPS7A2650DRVR is the manufacturer-recommended substitute for new designs and ongoing production. This part is in Active product status, ensuring long-term availability. The TPS7A2650DRVR provides superior performance with 50% reduction in dropout voltage (0.33V vs. 0.65V), 97.4% reduction in quiescent current (4.5 µA vs. 175 µA), and enhanced PSRR characteristics. The package change from 8-SOIC to 6-WSON (2x2) requires PCB layout modification. Additional control features include Power Good output and UVLO (Under-Voltage Lock-Out) protection. Maximum input voltage increases to 18V, providing greater design margin.

Both substitutes maintain RoHS3 compliance and the full operating temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can LP2989AIM-5.0/NOPB be used as a direct replacement for LP2989IM-5.0/NOPB?

A: Yes. The LP2989AIM-5.0/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current capacity, dropout voltage, and 8-SOIC packaging. No circuit modifications are required. The only differences are product status (Last Time Buy) and packaging format (Tube).

Q: What are the main differences between LP2989IM-5.0/NOPB and TPS7A2650DRVR?

A: Both devices provide 5V fixed output at 500mA with identical operating temperature ranges and RoHS3 compliance. The TPS7A2650DRVR offers improved performance: 50% lower dropout voltage, 97.4% lower quiescent current, higher maximum input voltage (18V vs. 16V), and additional control features (Power Good output and UVLO protection). The package differs: 8-SOIC versus 6-WSON (2x2), requiring PCB layout changes.

Q: Is PCB layout modification required when switching to TPS7A2650DRVR?

A: Yes. The TPS7A2650DRVR uses a 6-WSON (2x2) package instead of the 8-SOIC package. PCB footprint, trace routing, and component placement must be updated to accommodate the different package dimensions and pin configuration.

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

A: TPS7A2650DRVR is recommended for new designs. This part maintains Active product status, ensuring long-term availability and supply chain stability. The improved electrical characteristics reduce power dissipation and enhance system performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both LP2989AIM-5.0/NOPB and TPS7A2650DRVR are RoHS3 compliant, matching the compliance status of the original LP2989IM-5.0/NOPB.

Q: What protection features are included in each part?

A: LP2989IM-5.0/NOPB and LP2989AIM-5.0/NOPB include over-current, over-temperature, and short-circuit protection. TPS7A2650DRVR includes over-current, over-temperature, and UVLO (Under-Voltage Lock-Out) protection, providing additional safeguards against low input voltage conditions.

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