LP2989AIMM-2.5 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP2989AIMM-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 500mA output current with a fixed 2.5V output and operates across an input voltage range up to 16V. The regulator integrates protection features including over-current, over-temperature, and short-circuit protection, making it suitable for low-noise power management applications.

The main part number LP2989AIMM-2.5 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LP2989AIMM-2.5

Texas InstrumentsIn Stock: 3301LP2989AIMM-2.5 Datasheet

Current PartRFQ

LP2989AIMM-2.5/NOPB

National SemiconductorIn Stock: 2010LP2989AIMM-2.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989AIMM-2.5 are identified based on strict parametric equivalence across the following critical criteria:

• Fixed output voltage of 2.5V
• Maximum output current of 500mA
• Maximum input voltage rating of 16V
• Maximum dropout voltage of 0.65V @ 500mA
• Quiescent current of 175 µA
• PSRR specification of 60dB (1kHz)
• Surface mount packaging in 8-TSSOP/8-MSOP form factor
• Operating temperature range of -40°C ~ 125°C
• Integrated protection features: Over-current, over-temperature, and short-circuit protection
• Enable control feature

The substitute part LP2989AIMM-2.5/NOPB meets all these parameters identically, establishing it as a parametric equivalent. The primary distinction is product status and packaging designation.

Parameter Comparison

Engineering Selection Recommendations

The LP2989AIMM-2.5/NOPB is the identified parametric equivalent for the obsolete LP2989AIMM-2.5. The substitute part carries Active product status, ensuring ongoing availability and supply chain support. Both parts are manufactured to identical electrical and mechanical specifications, with equivalent ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Selection of the substitute part is supported by complete parametric alignment across all critical performance and physical characteristics. The transition from the obsolete main part to the active substitute part maintains functional compatibility while securing long-term component availability.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are parametrically equivalent across all electrical specifications, output voltage, current ratings, dropout voltage, quiescent current, PSRR, protection features, and operating temperature range. The package and mounting type are identical.

Q: What is the significance of the "/NOPB" suffix in the substitute part number?

A: The "/NOPB" designation indicates the part is supplied without lead (Pb) in the solder plating, reflecting RoHS compliance in the packaging specification. This is a packaging variant designation and does not affect electrical performance or functional compatibility.

Q: Are there any compliance or certification differences between the main part and substitute?

A: Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The primary difference is product status: the main part is Obsolete while the substitute is Active, making the substitute the recommended choice for new designs and ongoing production.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching fixed output voltage (2.5V), output current (500mA), maximum input voltage (16V), dropout voltage (0.65V @ 500mA), quiescent current (175 µA), PSRR (60dB at 1kHz), package form factor (8-TSSOP/8-MSOP), operating temperature range (-40°C ~ 125°C), and integrated protection features (over-current, over-temperature, short-circuit).

Q: Is the surface mount package compatible with existing PCB designs?

A: Yes. Both the main part and substitute use identical surface mount packaging: 8-TSSOP and 8-MSOP with 0.118" width (3.00mm). PCB footprints and assembly processes remain unchanged.