LP3891EMR-1.2 Equivalent & Substitute Parts

Part Overview

The LP3891EMR-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 800mA output current at a fixed 1.2V output with a maximum dropout voltage of 0.43V at full load. The main part number is currently in Last Time Buy status, making identification of active equivalent parts essential for ongoing design support and procurement planning.

Substiute Parts

LP3891EMR-1.2

Texas InstrumentsIn Stock: 1264LP3891EMR-1.2 Datasheet

Current PartRFQ

LP3891EMR-1.2/NOPB

Texas InstrumentsIn Stock: 1368LP3891EMR-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP3891EMR-1.2 is determined by the following critical parameters:

• Output voltage specification (1.2V fixed)
• Output current capability (800mA minimum)
• Maximum input voltage rating (5.5V)
• Package type (8-PowerSOIC with PowerPad)
• Dropout voltage performance (0.43V @ 800mA)
• Protection features (Over Current, Over Temperature, Short Circuit, UVLO)
• Operating temperature range (-40°C ~ 125°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The LP3891EMR-1.2/NOPB is a direct equivalent part that maintains identical electrical and mechanical specifications while offering active product status.

Parameter Comparison

Engineering Selection Recommendations

The LP3891EMR-1.2/NOPB is the direct equivalent for the LP3891EMR-1.2. Both parts are manufactured by Texas Instruments with identical electrical performance, thermal characteristics, and package specifications. The primary distinction is product lifecycle status: the original part number is in Last Time Buy status, while the /NOPB variant maintains Active status, ensuring continued availability and manufacturing support.

Selection between these part numbers should be based on procurement timeline and inventory requirements. The /NOPB designation indicates lead-free and halogen-free compliance, consistent with ROHS3 requirements for both variants.

Frequently Asked Questions (FAQ)

Q: Can LP3891EMR-1.2/NOPB be used as a direct replacement for LP3891EMR-1.2?

A: Yes. Both parts are electrically and mechanically identical. The /NOPB suffix indicates the same lead-free and halogen-free manufacturing process. All electrical parameters, output voltage, current rating, dropout voltage, and protection features are equivalent.

Q: What does the Last Time Buy status mean for the original part number?

A: Last Time Buy indicates that Texas Instruments has announced end-of-life for the LP3891EMR-1.2. New orders may still be accepted for a limited period, but the manufacturer will not produce additional quantities beyond existing inventory. The LP3891EMR-1.2/NOPB remains in Active status for ongoing production.

Q: Are the package dimensions identical between both part numbers?

A: Yes. Both parts use the 8-PowerSOIC package with 0.154" (3.90mm) width. PCB footprints and thermal pad layouts are identical, allowing direct board-level substitution without layout modifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both LP3891EMR-1.2 and LP3891EMR-1.2/NOPB are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 3, 168 hours). Compliance certifications are equivalent.

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

A: The LP3891EMR-1.2/NOPB is the active production variant with continued manufacturing support. The original LP3891EMR-1.2 is in Last Time Buy status. No electrical or mechanical differences exist between the two parts.