LP3879MR-1.2 Equivalent & Substitute Parts

Part Overview

The LP3879MR-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 integrated protection features including over-current, over-temperature, and short-circuit protection. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this regulator.

Substiute Parts

LP3879MR-1.2

Texas InstrumentsIn Stock: 1423LP3879MR-1.2 Datasheet

Current PartRFQ

LP3879MR-1.2/NOPB

Texas InstrumentsIn Stock: 1192LP3879MR-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3879MR-1.2 is determined by strict equivalence across the following critical parameters:

• Output voltage: 1.2V fixed
• Maximum output current: 800mA
• Input voltage rating: 6V maximum
• Package type: 8-PowerSOIC with identical pinout and thermal characteristics
• Protection features: Over-current, over-temperature, and short-circuit protection
• Quiescent current: 1.4 mA
• PSRR performance: 60dB at 1kHz
• Operating temperature range: -40°C to 125°C
• Surface mount configuration

The LP3879MR-1.2/NOPB qualifies as a direct substitute based on identical electrical specifications and package compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LP3879MR-1.2/NOPB is the direct equivalent substitute for the LP3879MR-1.2. Both parts share identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the original part is Last Time Buy while the substitute is Active, ensuring continued availability and supply chain support. The /NOPB designation indicates lead-free plating, consistent with ROHS3 compliance requirements. Selection of the LP3879MR-1.2/NOPB eliminates obsolescence risk while maintaining full functional and mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the LP3879MR-1.2/NOPB be used as a direct replacement for LP3879MR-1.2?

A: Yes. Both parts are electrically and mechanically identical. The /NOPB suffix indicates lead-free plating and does not affect performance or compatibility. The substitute is recommended due to the original part's Last Time Buy status.

Q: Are there any differences in package dimensions or pinout?

A: No. Both parts use the 8-PowerSOIC package with identical 0.154" width and 3.90mm dimensions. Pinout and thermal pad configuration are identical, enabling direct PCB substitution without layout modifications.

Q: What is the significance of the /NOPB designation?

A: NOPB indicates "No Plumbum" (lead-free). This designation reflects compliance with ROHS3 standards and does not alter electrical performance or reliability characteristics.

Q: Is the LP3879MR-1.2/NOPB suitable for new designs?

A: Yes. The substitute part carries Active product status, ensuring long-term availability and supply reliability for both legacy and new applications requiring a 1.2V, 800mA linear regulator in 8-PowerSOIC packaging.

Q: Are there compliance or certification differences between the two parts?

A: No. Both parts maintain identical RoHS3 compliance, MSL rating of 3 (168 Hours), REACH unaffected status, and ECCN/HTSUS classifications.