LP2989IMMX-5.0 Equivalent & Substitute Parts

Part Overview

The LP2989IMMX-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity in an 8-VSSOP surface mount package. This part is classified as Obsolete, making identification of functional equivalents essential for ongoing design support and production continuity. The device provides integrated protection features including over-current, over-temperature, and short-circuit protection, with an enable control feature for power management applications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
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 to 125°C
Package	8-VSSOP (8-TSSOP, 8-MSOP, 0.118" / 3.00mm Width)
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP2989IMMX-5.0 are identified based on strict electrical and mechanical parameter matching within the linear voltage regulator category. The substitution criteria are:

Fixed 5V positive output voltage
500mA output current capability
Maximum input voltage of 16V
Voltage dropout specification of 0.65V @ 500mA
Quiescent current of 175 µA
PSRR of 60dB (1kHz)
Operating temperature range of -40°C to 125°C
8-VSSOP package configuration
Enable control feature
Over-current, over-temperature, and short-circuit protection

Two parametric equivalents meet these criteria with identical electrical specifications and package requirements.

Parameter Comparison

Parameter	LP2989IMMX-5.0	LP2989AIMM-5.0/NOPB	LP2989AIMMX-5.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	5V	5V	5V
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 to 125°C	-40°C to 125°C	-40°C to 125°C
Package	8-VSSOP	8-VSSOP	8-VSSOP
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
Product Status	Obsolete	Last Time Buy	Active
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected
Packaging Type	Bulk	Cut Tape (CT)	Tape & Reel (TR)

Engineering Selection Recommendations

Both LP2989AIMM-5.0/NOPB and LP2989AIMMX-5.0/NOPB provide complete electrical and mechanical equivalence to the LP2989IMMX-5.0. Selection between these substitutes depends on product lifecycle and regulatory requirements:

LP2989AIMM-5.0/NOPB carries Last Time Buy status with ROHS3 compliance and REACH unaffected certification, suitable for designs requiring regulatory compliance with extended availability windows.

LP2989AIMMX-5.0/NOPB maintains Active product status with ROHS3 compliance and REACH unaffected certification, providing long-term design support and supply continuity. This part is the preferred selection for new designs and ongoing production requiring sustained component availability.

Both substitutes eliminate the RoHS non-compliance and REACH affected status of the obsolete LP2989IMMX-5.0, aligning with current regulatory standards.

Frequently Asked Questions (FAQ)

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

A: Yes. All three parts share identical electrical specifications including 5V fixed output, 500mA current capacity, 0.65V dropout voltage, 175 µA quiescent current, and 60dB PSRR. The 8-VSSOP package configuration is identical across all three parts, enabling direct pin-compatible substitution.

Q: What is the difference between LP2989AIMM-5.0/NOPB and LP2989AIMMX-5.0/NOPB?

A: The primary differences are packaging format and product lifecycle status. LP2989AIMM-5.0/NOPB is supplied in Cut Tape (CT) format with Last Time Buy status. LP2989AIMMX-5.0/NOPB is supplied in Tape & Reel (TR) format with Active product status. Both maintain identical electrical performance and regulatory compliance.

Q: Why is the LP2989IMMX-5.0 classified as Obsolete?

A: Obsolete classification indicates the part is no longer in active production. The LP2989AIMM-5.0/NOPB and LP2989AIMMX-5.0/NOPB variants provide continued support for this functional specification with current manufacturing and regulatory compliance.

Q: Are there regulatory compliance differences between the main part and substitutes?

A: Yes. The LP2989IMMX-5.0 is RoHS non-compliant and REACH affected. Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement and use.

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

A: LP2989AIMMX-5.0/NOPB is the recommended selection for new designs due to Active product status, ensuring long-term availability and manufacturing support. This part is supplied in standard Tape & Reel format suitable for automated assembly processes.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use the 8-VSSOP package with identical dimensions of 0.118" width and 3.00mm width specification, enabling direct PCB layout compatibility without redesign.

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