LP2989IMMX-3.0/NOPB Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2989IMMX-3.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 500mA current capacity in an 8-VSSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. 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
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	3V
Voltage - Input (Max)	16V
Current - Output	500mA
Voltage Dropout (Max)	0.65V @ 500mA
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LP2989IMMX-3.0/NOPB is determined by the following critical parameters:

Fixed 3V output voltage
500mA output current capacity
8-pin surface mount package (8-VSSOP or 8-MSOP)
Positive fixed output configuration
Enable control feature
Operating temperature range -40°C to 125°C
Over-current, over-temperature, and short-circuit protection

Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments (LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB) that maintain identical electrical specifications and packaging, and a manufacturer-recommended alternative from Microchip Technology (MIC5219-3.0YMM-TR) that meets the same functional requirements with minor specification variations.

Parameter Comparison

Parameter	LP2989IMMX-3.0/NOPB	LP2989AIMM-3.0/NOPB	LP2989IMM-3.0/NOPB	MIC5219-3.0YMM-TR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Microchip Technology
Product Status	Obsolete	Active	Active	Active
Output Voltage (Fixed)	3V	3V	3V	3V
Voltage - Input (Max)	16V	16V	16V	12V
Current - Output	500mA	500mA	500mA	500mA
Voltage Dropout (Max)	0.65V @ 500mA	0.65V @ 500mA	0.65V @ 500mA	0.6V @ 500mA
Current - Quiescent (Iq)	175 µA	175 µA	175 µA	8 µA
PSRR	60dB (1kHz)	60dB (1kHz)	60dB (1kHz)	75dB (120Hz)
Package / Case	8-VSSOP	8-VSSOP	8-VSSOP	8-MSOP
Packaging Type	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

For applications currently using the obsolete LP2989IMMX-3.0/NOPB, the parametric equivalents LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB are direct replacements. Both are active products from Texas Instruments with identical electrical specifications, protection features, and operating temperature ranges. These parts are available in Tape & Reel packaging, suitable for production environments.

The MIC5219-3.0YMM-TR from Microchip Technology is a manufacturer-recommended alternative that meets functional requirements with the following considerations: maximum input voltage is reduced to 12V (compared to 16V for LP2989 variants), quiescent current is significantly lower at 8 µA, and PSRR performance is improved at 75dB. The MIC5219 includes reverse polarity protection in addition to standard protection features. Moisture sensitivity level is MSL 3 (168 hours) compared to MSL 1 for Texas Instruments parts. Both 8-VSSOP and 8-MSOP packages are mechanically compatible with 0.118" (3.00mm) width specifications.

All substitute parts maintain ROHS3 compliance and are suitable for the -40°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB be used interchangeably with LP2989IMMX-3.0/NOPB?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output voltage, current capacity, dropout voltage, and protection features. The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel vs. bulk). Electrical performance and pin configuration are equivalent.

Q: What are the key differences between Texas Instruments LP2989 variants and the Microchip MIC5219-3.0YMM-TR?

A: The MIC5219 has a lower maximum input voltage (12V vs. 16V), significantly lower quiescent current (8 µA vs. 175 µA), and improved PSRR performance (75dB vs. 60dB). The MIC5219 includes reverse polarity protection. Both devices deliver 500mA at 3V output with similar dropout voltage performance. The MIC5219 has a higher moisture sensitivity level (MSL 3 vs. MSL 1).

Q: Are the 8-VSSOP and 8-MSOP packages mechanically compatible?

A: Both packages share the same 0.118" (3.00mm) width specification and are surface mount 8-pin configurations. However, pin pitch and footprint details may differ. Verify PCB layout compatibility before substituting between package types.

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

A: For direct replacement of the obsolete LP2989IMMX-3.0/NOPB, select either LP2989AIMM-3.0/NOPB or LP2989IMM-3.0/NOPB. Both are active Texas Instruments products with identical specifications. For applications where lower quiescent current is beneficial and input voltage does not exceed 12V, the MIC5219-3.0YMM-TR is a viable alternative.

Q: What is the impact of different MSL ratings on component handling?

A: MSL 1 (unlimited) allows indefinite shelf life without moisture absorption concerns. MSL 3 (168 hours) requires controlled storage conditions and limits shelf life to 168 hours after bag opening under specified humidity conditions. Verify storage and handling procedures align with component MSL requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. LP2989AIMM-3.0/NOPB, LP2989IMM-3.0/NOPB, and MIC5219-3.0YMM-TR are all ROHS3 compliant and suitable for applications requiring RoHS compliance.

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