LP3875ESX-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3875ESX-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 1.5A output current in a surface-mount TO-263 (DDPAK-5) package and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity, production planning, and long-term component sourcing strategies.

Substiute Parts

LP3875ESX-ADJ

Texas InstrumentsIn Stock: 5710LP3875ESX-ADJ Datasheet

Current PartRFQ

LP3875ESX-ADJ/NOPB

Texas InstrumentsIn Stock: 2317LP3875ESX-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP3875ESX-ADJ is determined by strict equivalence across the following critical parameters:

• Output configuration (Positive)
• Output type (Adjustable)
• Number of regulators (1)
• Maximum input voltage (7V)
• Output voltage range (1.22V to 6.4V)
• Output current capability (1.5A)
• Voltage dropout specification (0.55V @ 1.5A)
• Quiescent current (5 mA)
• PSRR performance (73dB ~ 57dB at 120Hz)
• Control features (Enable function)
• Protection features (Over Current, Over Temperature, Short Circuit)
• Operating temperature range (-40°C ~ 125°C)
• Package type (TO-263 DDPAK-5)

Only parts matching all these parameters across the specified ranges are considered direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The LP3875ESX-ADJ/NOPB is the direct parametric equivalent to the LP3875ESX-ADJ. Both parts share identical electrical specifications, output characteristics, and package configuration. The primary distinction is product status and regulatory compliance.

The LP3875ESX-ADJ is classified as obsolete, whereas the LP3875ESX-ADJ/NOPB maintains active product status. For new designs or production continuity, the LP3875ESX-ADJ/NOPB is the appropriate selection. This variant is ROHS3 compliant and REACH affected, meeting current environmental and regulatory requirements, whereas the original part is RoHS non-compliant.

Both parts are supplied in TO-263 (DDPAK-5) surface-mount packaging and are functionally interchangeable at the circuit level. Selection between these variants should be based on regulatory compliance requirements and component availability status.

Frequently Asked Questions (FAQ)

Q: Can LP3875ESX-ADJ/NOPB be used as a direct replacement for LP3875ESX-ADJ?

A: Yes. Both parts are parametrically identical across all electrical specifications, output voltage range, current rating, protection features, and package configuration. The LP3875ESX-ADJ/NOPB is the active production variant and is recommended for new applications.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix denotes the packaging format and lead finish specification. This variant is supplied in Cut Tape (CT) and Digi-Reel® packaging, whereas the base part may have different packaging options.

Q: Are there differences in RoHS compliance between these parts?

A: Yes. The LP3875ESX-ADJ is RoHS non-compliant, while the LP3875ESX-ADJ/NOPB is ROHS3 compliant. For applications subject to RoHS regulations, the LP3875ESX-ADJ/NOPB must be used.

Q: Do both parts use the same PCB footprint?

A: Yes. Both parts use the TO-263-6 (D2PAK with 5 Leads + Tab) package, ensuring identical PCB footprint compatibility and no layout modifications are required.

Q: What is the significance of the obsolete status?

A: The LP3875ESX-ADJ is classified as obsolete, indicating it is no longer in active production. The LP3875ESX-ADJ/NOPB remains in active production and is the recommended choice for design continuity and long-term component availability.

Q: Are the thermal and electrical performance characteristics identical?

A: Yes. Both parts deliver 1.5A output current, maintain 0.55V maximum dropout voltage at rated current, and operate across the -40°C to 125°C temperature range with identical quiescent current and PSRR specifications.