LP3874EMP-3.3 Equivalent & Substitute Parts

Part Overview

The LP3874EMP-3.3 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 3.3V output at 800mA with a maximum dropout voltage of 0.35V at full load. The device features integrated over-current, over-temperature, and short-circuit protection, with an enable control feature for power management applications.

The LP3874EMP-3.3 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this part number. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for existing applications or new designs requiring this functional specification.

Substiute Parts

LP3874EMP-3.3

Texas InstrumentsIn Stock: 2515LP3874EMP-3.3 Datasheet

Current PartRFQ

LP3871EMP-3.3/NOPB

Texas InstrumentsIn Stock: 1116LP3871EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3871EMPX-3.3/NOPB

Texas InstrumentsIn Stock: 1297LP3871EMPX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3874EMP-3.3/NOPB

Texas InstrumentsIn Stock: 3433LP3874EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3874EMPX-3.3/NOPB

Texas InstrumentsIn Stock: 2053LP3874EMPX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3961EMP-3.3/NOPB

Texas InstrumentsIn Stock: 51510LP3961EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3964EMP-3.3/NOPB

Texas InstrumentsIn Stock: 3331LP3964EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3874EMP-3.3 are determined by strict equivalence across the following parameters:

• Fixed output voltage of 3.3V
• Output current rating of 800mA
• Maximum input voltage of 7V
• Maximum dropout voltage of 0.35V @ 800mA
• SOT-223-5 package configuration
• Enable control feature
• Over-current, over-temperature, and short-circuit protection
• Operating temperature range of -40°C to 125°C
• ROHS3 compliance and MSL Level 1

The substitute parts are grouped into two functional categories based on quiescent current specifications:

LP3874 Series (9mA Quiescent Current): LP3874EMP-3.3/NOPB, LP3874EMPX-3.3/NOPB

LP3871 Series (5mA Quiescent Current): LP3871EMP-3.3/NOPB, LP3871EMPX-3.3/NOPB

LP3961 and LP3964 Series (9mA Quiescent Current): LP3961EMP-3.3/NOPB, LP3964EMP-3.3/NOPB

All substitute parts maintain identical electrical specifications for voltage regulation, current delivery, protection features, and thermal performance. Differences exist only in packaging format (Cut Tape vs. Tape & Reel) and quiescent current consumption in the LP3871 variants.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the LP3874EMP-3.3, the following selection criteria apply based on product status and compliance:

Primary Substitutes (Active Status, Highest Availability):

LP3961EMP-3.3/NOPB and LP3964EMP-3.3/NOPB are recommended as primary substitutes. Both parts maintain identical electrical specifications to the original LP3874EMP-3.3, including 9mA quiescent current, and carry Active product status with substantial inventory availability (51498 Pcs and 3274 Pcs respectively). Both are ROHS3 compliant and MSL Level 1.

Secondary Substitutes (Active Status, Lower Quiescent Current):

LP3871EMP-3.3/NOPB and LP3871EMPX-3.3/NOPB offer reduced quiescent current consumption at 5mA, providing improved power efficiency in battery-powered or low-power standby applications. These parts are Active status with ROHS3 compliance. The trade-off is lower inventory availability compared to primary substitutes.

Packaging Consideration:

LP3874EMP-3.3/NOPB and LP3874EMPX-3.3/NOPB are direct part number equivalents with Active status. The EMP variant uses Cut Tape packaging, while the EMPX variant uses Tape & Reel packaging. Selection depends on procurement and assembly requirements.

All substitute parts maintain identical regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification) and thermal performance specifications.

Frequently Asked Questions (FAQ)

Q: Can LP3871EMP-3.3/NOPB replace LP3874EMP-3.3 in my design?

A: Yes. The LP3871EMP-3.3/NOPB is electrically equivalent with identical output voltage (3.3V), output current (800mA), dropout voltage (0.35V @ 800mA), and protection features. The primary difference is reduced quiescent current (5mA vs. 9mA), which improves power efficiency. No circuit modifications are required.

Q: What is the difference between LP3874EMP-3.3/NOPB and LP3874EMPX-3.3/NOPB?

A: Both parts are electrically identical with the same specifications. The difference is packaging format: EMP uses Cut Tape (CT) & Digi-Reel packaging, while EMPX uses Tape & Reel (TR) packaging. Selection depends on your assembly process and procurement method.

Q: Why is LP3961EMP-3.3/NOPB recommended over other substitutes?

A: LP3961EMP-3.3/NOPB maintains identical electrical specifications to the original LP3874EMP-3.3 (including 9mA quiescent current) and carries Active product status. It has the highest inventory availability (51498 Pcs), ensuring reliable supply chain access. It is ROHS3 compliant and MSL Level 1.

Q: Are all substitute parts in the same SOT-223-5 package?

A: Yes. All substitute parts use the SOT-223-5 package configuration (TO-261-5, TO-261AB). They are pin-compatible and require no PCB layout modifications.

Q: Do substitute parts have the same protection features?

A: Yes. All substitute parts include identical protection: over-current, over-temperature, and short-circuit protection. All operate across the same temperature range (-40°C to 125°C) and include the Enable control feature.

Q: Which substitute should I choose for battery-powered applications?

A: LP3871EMP-3.3/NOPB or LP3871EMPX-3.3/NOPB are optimal for battery-powered designs due to their reduced quiescent current (5mA vs. 9mA), extending battery life. All other electrical specifications remain identical to the original part.