LP3876ET-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LP3876ET-ADJ/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Through Hole mounted device delivers 3A output current with adjustable voltage ranging from 1.2V to 5.8V, making it suitable for various power management applications requiring flexible voltage regulation.

The LP3876ET-ADJ/NOPB is classified as Obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LP3876ET-ADJ/NOPB

Texas InstrumentsIn Stock: 827LP3876ET-ADJ/NOPB Datasheet

Current PartRFQ

LT1764AET#PBF

Analog Devices Inc.In Stock: 2121LT1764AET#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3876ET-ADJ/NOPB are identified based on the following critical parameters that determine functional compatibility:

Mechanical Compatibility:

• Package / Case: TO-220-5 (Through Hole mounting)
• Mounting Type: Through Hole

Electrical Compatibility:

• Output Configuration: Positive
• Current - Output: 3A minimum
• Operating Temperature Range: -40°C ~ 125°C
• Protection Features: Over Current, Over Temperature

Regulatory Compliance:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

The LT1764AET#PBF from Analog Devices Inc. qualifies as a substitute based on matching mechanical form factor, output current capability, operating temperature range, and regulatory compliance requirements. While the LT1764AET#PBF features fixed output voltage rather than adjustable output, it maintains the same TO-220-5 package, 3A output current, and protective features necessary for equivalent circuit-level substitution in applications where the fixed 1.21V output voltage is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The LT1764AET#PBF is an Active product from Analog Devices Inc., providing superior supply chain availability compared to the Obsolete LP3876ET-ADJ/NOPB. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards.

The LT1764AET#PBF offers improved electrical performance characteristics, including lower dropout voltage (0.66V versus 1.2V @ 3A) and reduced quiescent current (1.5 mA versus 5 mA). The substitute part supports higher maximum input voltage (20V versus 7V) and provides reverse polarity protection in addition to over current and over temperature protection.

Selection of the LT1764AET#PBF requires confirmation that the fixed 1.21V output voltage is compatible with the application circuit. The adjustable output range of the original LP3876ET-ADJ/NOPB cannot be replicated with this fixed-output substitute.

Frequently Asked Questions (FAQ)

Q: Can the LT1764AET#PBF directly replace the LP3876ET-ADJ/NOPB in all applications?

A: Direct replacement is possible only in applications where a fixed 1.21V output voltage is acceptable. The LP3876ET-ADJ/NOPB provides adjustable output from 1.2V to 5.8V, while the LT1764AET#PBF delivers fixed 1.21V output. Circuit redesign may be required if the original design depends on adjustable voltage output.

Q: Are the packages physically identical?

A: Both devices use TO-220-5 package with Through Hole mounting. Pin configuration and physical dimensions are compatible for direct socket substitution.

Q: What are the key electrical differences?

A: The LT1764AET#PBF features lower dropout voltage (0.66V @ 3A versus 1.2V @ 3A), lower quiescent current (1.5 mA versus 5 mA), and higher maximum input voltage rating (20V versus 7V). Both devices deliver 3A output current and operate across -40°C to 125°C temperature range.

Q: Are both parts RoHS compliant?

A: Yes, both the LP3876ET-ADJ/NOPB and LT1764AET#PBF are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: Why is the original part listed as Obsolete?

A: The LP3876ET-ADJ/NOPB is classified as Obsolete by Texas Instruments. The LT1764AET#PBF maintains Active status with Analog Devices Inc., ensuring ongoing availability and technical support for new designs and production continuity.