LP2989IMMX-2.5/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IMMX-2.5/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) device. It delivers a fixed 2.5V output at 500mA with a maximum dropout voltage of 0.65V. The device integrates over-current, over-temperature, and short-circuit protection, making it suitable for low-noise, micropower applications requiring stable voltage regulation.

This part is currently marked as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LP2989IMMX-2.5/NOPB

Texas InstrumentsIn Stock: 1041LP2989IMMX-2.5/NOPB Datasheet

Current PartRFQ

LP2989AIMM-2.5/NOPB

National SemiconductorIn Stock: 2010LP2989AIMM-2.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2989IMMX-2.5/NOPB is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 2.5V
• Output current capability of 500mA
• Maximum input voltage of 16V
• Dropout voltage specification of 0.65V @ 500mA
• Quiescent current of 175 µA
• PSRR of 60dB (1kHz)
• Operating temperature range of -40°C ~ 125°C
• Package configuration: 8-VSSOP
• Identical protection features: Over Current, Over Temperature, Short Circuit
• Enable control feature

The LP2989AIMM-2.5/NOPB meets all these criteria and qualifies as a parametric equivalent. The primary distinction is product status: the substitute part is Active, whereas the main part is Obsolete.

Parameter Comparison

Engineering Selection Recommendations

The LP2989AIMM-2.5/NOPB is a direct parametric equivalent to the LP2989IMMX-2.5/NOPB. All electrical and mechanical specifications are identical, including output voltage, current rating, dropout voltage, quiescent current, PSRR, operating temperature range, and package configuration.

The primary advantage of selecting the LP2989AIMM-2.5/NOPB is its Active product status, ensuring ongoing availability and supply chain support. The original part's Obsolete status presents long-term sourcing risk.

Both parts carry EAR99 export classification and HTSUS code 8542.39.0001. The main part is certified ROHS3 Compliant; compliance status for the substitute part is not specified in available documentation.

Frequently Asked Questions (FAQ)

Q: Can the LP2989AIMM-2.5/NOPB be used as a direct replacement for the LP2989IMMX-2.5/NOPB?

A: Yes. All electrical parameters, output specifications, protection features, and package dimensions are identical. The devices are pin-compatible and functionally equivalent.

Q: What is the difference between these two part numbers?

A: The LP2989AIMM-2.5/NOPB is manufactured by National Semiconductor and maintains Active product status. The LP2989IMMX-2.5/NOPB is from Texas Instruments and is marked Obsolete. Electrical and mechanical specifications are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the 8-VSSOP package configuration with identical pin assignments and mechanical dimensions (0.118" width, 3.00mm).

Q: What compliance certifications apply to these parts?

A: Both parts carry EAR99 export classification and HTSUS code 8542.39.0001. The LP2989IMMX-2.5/NOPB is ROHS3 Compliant. RoHS compliance status for the LP2989AIMM-2.5/NOPB is not specified.

Q: Is the quiescent current identical between these parts?

A: Yes. Both devices specify 175 µA quiescent current, ensuring equivalent power consumption in standby or low-load conditions.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Identical package type, pinout, and electrical specifications allow direct PCB substitution without design modifications.