LP3875EMP-3.3 Equivalent & Substitute Parts

Part Overview

The LP3875EMP-3.3 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 3.3V output at 1.5A in a SOT-223-5 surface mount package. This device is classified as Obsolete, making identification of equivalent and substitute parts essential for ongoing production support, design updates, and inventory management. The part provides positive fixed output configuration with integrated protection features including over-current, over-temperature, and short-circuit protection, operating across the industrial temperature range of -40°C to 125°C.

Substiute Parts

LP3875EMP-3.3

Texas InstrumentsIn Stock: 1925LP3875EMP-3.3 Datasheet

Current PartRFQ

LP3852EMP-3.3

Texas InstrumentsIn Stock: 1523LP3852EMP-3.3 Datasheet

Parametric EquivalentRFQ

LP3852EMP-3.3/NOPB

Texas InstrumentsIn Stock: 2298LP3852EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3855EMP-3.3/NOPB

Texas InstrumentsIn Stock: 2488LP3855EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3872EMP-3.3/NOPB

Texas InstrumentsIn Stock: 55394LP3872EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3872EMPX-3.3/NOPB

Texas InstrumentsIn Stock: 3093LP3872EMPX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3875EMP-3.3/NOPB

Texas InstrumentsIn Stock: 1738LP3875EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3962EMP-3.3

Texas InstrumentsIn Stock: 1291LP3962EMP-3.3 Datasheet

Parametric EquivalentRFQ

LP3962EMP-3.3/NOPB

Texas InstrumentsIn Stock: 1705LP3962EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3965EMP-3.3/NOPB

Texas InstrumentsIn Stock: 1505LP3965EMP-3.3/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP3875EMP-3.3 is determined by strict equivalence across the following critical parameters:

• Output voltage: 3.3V fixed
• Output current capability: 1.5A
• Input voltage maximum: 7V
• Package type: SOT-223-5
• Protection features: Over-current, over-temperature, short-circuit
• Control features: Enable function
• Operating temperature range: -40°C to 125°C
• Mounting type: Surface mount

Substitute parts are grouped into two categories based on electrical performance characteristics:

Group A (Improved Dropout Performance): LP3852EMP-3.3, LP3852EMP-3.3/NOPB, LP3855EMP-3.3/NOPB feature reduced dropout voltage of 0.44V @ 1.5A and lower quiescent current of 3 mA, providing enhanced efficiency.

Group B (Equivalent Dropout Performance): LP3872EMP-3.3/NOPB, LP3872EMPX-3.3/NOPB, LP3875EMP-3.3/NOPB, LP3962EMP-3.3, LP3962EMP-3.3/NOPB, LP3965EMP-3.3/NOPB maintain the original 0.55V dropout specification with quiescent currents of 5 mA or 9 mA.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Active Production:

Select LP3852EMP-3.3/NOPB or LP3855EMP-3.3/NOPB as primary substitutes. Both parts are Active status with ROHS3 compliance, reduced dropout voltage of 0.44V @ 1.5A, and lower quiescent current of 3 mA, delivering superior power efficiency compared to the obsolete LP3875EMP-3.3.

For Equivalent Performance Replacement:

LP3872EMP-3.3/NOPB, LP3872EMPX-3.3/NOPB, or LP3875EMP-3.3/NOPB provide electrical equivalence with identical 0.55V dropout and 5 mA quiescent current specifications. All three are Active status with ROHS3 compliance. The LP3875EMP-3.3/NOPB maintains the original base part number with tape & reel packaging.

For Inventory Continuity:

LP3962EMP-3.3/NOPB and LP3965EMP-3.3/NOPB are Active status alternatives with ROHS3 compliance. These parts feature 9 mA quiescent current and 0.55V dropout, suitable for applications where the higher quiescent current is acceptable.

Compliance Consideration:

The original LP3875EMP-3.3 is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for new production and procurement.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-3.3/NOPB directly replace LP3875EMP-3.3 in existing designs?

A: Yes. Both parts deliver 3.3V at 1.5A in SOT-223-5 packaging with identical protection features and operating temperature range. The LP3852EMP-3.3/NOPB offers improved performance with lower dropout voltage (0.44V vs. 0.55V) and reduced quiescent current (3 mA vs. 5 mA). No circuit modifications are required.

Q: What is the difference between LP3872EMP-3.3/NOPB and LP3872EMPX-3.3/NOPB?

A: Both parts are electrically equivalent with identical specifications: 3.3V output, 1.5A current, 0.55V dropout, and 5 mA quiescent current. The suffix variation reflects packaging or manufacturing designation. Verify with Texas Instruments documentation for specific application requirements.

Q: Why do some substitute parts have higher quiescent current (9 mA vs. 5 mA)?

A: LP3962EMP-3.3/NOPB and LP3965EMP-3.3/NOPB feature 9 mA quiescent current while maintaining all other electrical specifications. This difference does not affect output voltage, current capacity, or protection features. Selection depends on application power budget requirements.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in SOT-223-5 package. Packaging formats (Cut Tape, Tape & Reel, Digi-Reel) vary by part number. Verify specific packaging availability with your supplier for procurement requirements.

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

A: The /NOPB designation indicates lead-free, RoHS-compliant manufacturing. Parts without this suffix may have different compliance status. For new designs, prioritize /NOPB variants to ensure regulatory compliance.

Q: Can I use LP3962EMP-3.3 (Last Time Buy status) in new production?

A: LP3962EMP-3.3 is designated Last Time Buy, indicating limited future availability. For new production, select Active status alternatives such as LP3852EMP-3.3/NOPB, LP3872EMP-3.3/NOPB, or LP3962EMP-3.3/NOPB to ensure long-term supply continuity.