LP2989AIM-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989AIM-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 Power Management (PMIC) category and is packaged in 8-SOIC format for surface mount applications. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 5V regulation at 500mA output.

Key Parameters

Parameter	LP2989AIM-5.0/NOPB
Output Voltage (Fixed)	5V
Output Current	500mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.65V @ 500mA
Quiescent Current	175 µA
Operating Temperature Range	-40°C ~ 125°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP2989AIM-5.0/NOPB is determined by the following critical electrical and mechanical parameters:

Fixed output voltage of 5V
Output current capability of 500mA minimum
Input voltage tolerance up to 16V or higher
Operating temperature range of -40°C to 125°C
Surface mount packaging compatibility
RoHS3 compliance and MSL Level 1 rating
Enable control feature for circuit management

The TPS7A2650DRVR qualifies as a manufacturer-recommended substitute based on matching these core parameters while offering improved electrical performance characteristics.

Parameter Comparison

Parameter	LP2989AIM-5.0/NOPB	TPS7A2650DRVR	Compatibility Notes
Output Voltage (Fixed)	5V	5V	Identical
Output Current	500mA	500mA	Identical
Input Voltage (Max)	16V	18V	TPS7A2650DRVR supports higher input voltage
Voltage Dropout (Max)	0.65V @ 500mA	0.33V @ 500mA	TPS7A2650DRVR provides superior dropout performance
Quiescent Current	175 µA	4.5 µA	TPS7A2650DRVR significantly lower quiescent current
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 125°C (TJ)	Identical
Package Type	8-SOIC	6-WSON (2x2)	Different package; PCB layout modification required
Control Features	Enable	Enable, Power Good	TPS7A2650DRVR includes additional Power Good output
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, UVLO	Both provide comprehensive protection; TPS7A2650DRVR adds UVLO
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

The TPS7A2650DRVR is the manufacturer-recommended substitute for the LP2989AIM-5.0/NOPB. Both devices maintain Active product status with full RoHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compliance equivalence.

The primary consideration for substitution is the package change from 8-SOIC to 6-WSON (2x2). This requires PCB layout modification and footprint redesign. The electrical performance of the TPS7A2650DRVR exceeds the original part, with lower dropout voltage (0.33V vs. 0.65V) and significantly reduced quiescent current (4.5 µA vs. 175 µA), making it suitable for applications where power efficiency is a design priority.

The TPS7A2650DRVR provides additional control features including Power Good output and UVLO (Under-Voltage Lockout) protection, which may enhance system reliability in applications requiring voltage monitoring or supply sequencing.

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2650DRVR directly replace the LP2989AIM-5.0/NOPB without PCB modifications?

A: No. The TPS7A2650DRVR uses a 6-WSON (2x2) package while the LP2989AIM-5.0/NOPB uses an 8-SOIC package. PCB footprint redesign and layout modification are required. Pin configuration and signal routing must be verified against device datasheets before implementation.

Q: What are the key electrical advantages of the TPS7A2650DRVR?

A: The TPS7A2650DRVR provides lower dropout voltage (0.33V vs. 0.65V at 500mA) and significantly lower quiescent current (4.5 µA vs. 175 µA). These characteristics reduce power dissipation and improve efficiency in battery-powered or thermally constrained applications.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the LP2989AIM-5.0/NOPB and TPS7A2650DRVR are ROHS3 compliant with MSL Level 1 rating, REACH unaffected status, and EAR99 ECCN classification.

Q: What is the significance of the Power Good output on the TPS7A2650DRVR?

A: The Power Good output provides a logic signal indicating when the regulated output voltage is within specification. This feature enables system-level voltage monitoring and supply sequencing, which may be beneficial for multi-rail power management applications.

Q: Does the higher input voltage rating of the TPS7A2650DRVR (18V vs. 16V) affect substitution compatibility?

A: The higher input voltage rating of the TPS7A2650DRVR (18V maximum) is compatible with applications designed for the LP2989AIM-5.0/NOPB (16V maximum). The substitute part provides additional margin for input voltage transients and supply variations.

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