LP3874EMPX-5.0 Equivalent & Substitute Parts

Part Overview

The LP3874EMPX-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output at 800mA in SOT-223-5 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device provides regulated 5V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring low-dropout linear regulation in compact form factors.

Substiute Parts

LP3874EMPX-5.0

Texas InstrumentsIn Stock: 12744LP3874EMPX-5.0 Datasheet

Current PartRFQ

LP3874EMPX-5.0/NOPB

Texas InstrumentsIn Stock: 818LP3874EMPX-5.0/NOPB Datasheet

DirectRFQ

LP3871EMP-5.0/NOPB

Texas InstrumentsIn Stock: 1456LP3871EMP-5.0/NOPB Datasheet

Parametric EquivalentRFQ

LP3874EMP-5.0/NOPB

National SemiconductorIn Stock: 42846LP3874EMP-5.0/NOPB Datasheet

Parametric EquivalentRFQ

LP3961EMP-5.0/NOPB

Texas InstrumentsIn Stock: 2483LP3961EMP-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP3874EMPX-5.0 is determined by the following critical parameters: fixed 5V output voltage, 800mA output current capability, maximum 7V input voltage rating, 0.35V maximum dropout voltage at 800mA, SOT-223-5 package compatibility, and integrated protection features (over-current, over-temperature, short-circuit). Parts meeting all these electrical and mechanical specifications are classified as direct substitutes or parametric equivalents. Variations in quiescent current, PSRR specifications, or packaging format (Tape & Reel versus Bulk) do not disqualify substitution when core electrical performance remains identical.

Parameter Comparison

Engineering Selection Recommendations

LP3874EMPX-5.0/NOPB is the direct successor to the obsolete LP3874EMPX-5.0, maintaining identical electrical specifications while achieving RoHS3 compliance. This part is the primary recommendation for new designs and obsolescence mitigation.

LP3871EMP-5.0/NOPB provides parametric equivalence with reduced quiescent current (5mA versus 9mA), offering improved power efficiency in battery-powered or low-power applications while maintaining all other electrical and mechanical specifications.

LP3961EMP-5.0/NOPB is functionally equivalent with identical electrical performance and RoHS3 compliance. PSRR specification data is not provided for this variant.

LP3874EMP-5.0/NOPB from National Semiconductor maintains electrical equivalence but is supplied in Bulk packaging rather than Tape & Reel format. RoHS compliance status is not specified for this variant.

Frequently Asked Questions (FAQ)

Q: Can LP3874EMPX-5.0/NOPB directly replace the obsolete LP3874EMPX-5.0?

A: Yes. LP3874EMPX-5.0/NOPB is electrically and mechanically identical to the original part, with the addition of RoHS3 compliance. It is the recommended direct replacement.

Q: What is the difference between LP3871EMP-5.0/NOPB and LP3874EMPX-5.0?

A: Both parts deliver 5V at 800mA with identical dropout voltage and package specifications. LP3871EMP-5.0/NOPB has lower quiescent current (5mA versus 9mA), making it suitable for applications where standby power consumption is critical.

Q: Are all substitute parts available in SOT-223-5 packaging?

A: LP3874EMPX-5.0/NOPB, LP3871EMP-5.0/NOPB, and LP3961EMP-5.0/NOPB are supplied in SOT-223-5 packaging. LP3874EMP-5.0/NOPB is supplied in SOT-223 packaging, which is mechanically compatible but sourced in Bulk format.

Q: Which substitute part has the best RoHS compliance status?

A: LP3874EMPX-5.0/NOPB, LP3871EMP-5.0/NOPB, and LP3961EMP-5.0/NOPB all meet RoHS3 compliance requirements. LP3874EMP-5.0/NOPB does not specify RoHS status.

Q: Can I use LP3961EMP-5.0/NOPB as a substitute?

A: Yes. LP3961EMP-5.0/NOPB meets all electrical and mechanical requirements for substitution, with RoHS3 compliance and active product status.