LP3965ET-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3965ET-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 TO-220-5 package and is classified as "Not For New Designs" by the manufacturer. Due to its discontinued status for new applications, identifying functionally equivalent substitute parts is essential for ongoing system support, maintenance, and legacy design updates.

Substiute Parts

LP3965ET-ADJ

Texas InstrumentsIn Stock: 2247LP3965ET-ADJ Datasheet

Current PartRFQ

LP3965ET-ADJ/NOPB

Texas InstrumentsIn Stock: 938LP3965ET-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP3965ET-ADJ is determined by strict alignment across the following critical parameters:

• Output configuration (Positive)
• Output type (Adjustable)
• Number of regulators (1)
• Maximum input voltage (7V)
• Output voltage range (1.216V to 5.1V)
• Output current capability (1.5A)
• Voltage dropout specification (0.55V @ 1.5A)
• Operating temperature range (-40°C ~ 125°C)
• Package type (TO-220-5 Formed Leads)
• Mounting type (Through Hole)
• Protection features (Over Current, Over Temperature, Short Circuit)

Parts meeting all these criteria are classified as direct functional equivalents and may be used as substitutes in applications originally designed for the LP3965ET-ADJ.

Parameter Comparison

Engineering Selection Recommendations

The LP3965ET-ADJ/NOPB is the direct functional equivalent of the LP3965ET-ADJ. Both parts share identical electrical specifications, output characteristics, and package configuration. The primary distinction is product lifecycle status: the original LP3965ET-ADJ is designated "Not For New Designs," while the LP3965ET-ADJ/NOPB maintains Active status.

For applications requiring RoHS compliance, the LP3965ET-ADJ/NOPB is ROHS3 compliant, whereas the original part is RoHS non-compliant. Both parts carry REACH Unaffected status and EAR99 export classification.

Selection between these parts should be based on compliance requirements and component availability. The LP3965ET-ADJ/NOPB is the preferred choice for new procurement due to its active product status and RoHS compliance certification.

Frequently Asked Questions (FAQ)

Q: Can LP3965ET-ADJ/NOPB replace LP3965ET-ADJ in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The LP3965ET-ADJ/NOPB is a direct substitute with identical output voltage range (1.216V to 5.1V), output current (1.5A), dropout voltage (0.55V @ 1.5A), and protection features.

Q: What is the difference between LP3965ET-ADJ and LP3965ET-ADJ/NOPB?

A: The primary differences are product status and RoHS compliance. The LP3965ET-ADJ is classified "Not For New Designs" and is RoHS non-compliant. The LP3965ET-ADJ/NOPB is Active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: Both parts use TO-220-5 Formed Leads package with Through Hole mounting. The LP3965ET-ADJ/NOPB is supplied in Tube packaging, while the original part packaging is not specified. This does not affect functional compatibility.

Q: What protection features are included in these regulators?

A: Both parts include Over Current, Over Temperature, and Short Circuit protection. These features are integral to the device design and present in all equivalent variants.

Q: Can these parts operate across the full temperature range in all applications?

A: Both parts are rated for -40°C to 125°C operating temperature. Application-specific thermal management and circuit design must account for the 0.55V maximum dropout voltage at 1.5A output current.