LP3981IMM-3.03 Equivalent & Substitute Parts

Part Overview

The LP3981IMM-3.03 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 300mA output current at a fixed 3.03V output with a maximum dropout voltage of 0.2V at full load. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently using this regulator.

Substiute Parts

LP3981IMM-3.03

Texas InstrumentsIn Stock: 2272LP3981IMM-3.03 Datasheet

Current PartRFQ

LP3981IMM-3.03/NOPB

Texas InstrumentsIn Stock: 5328LP3981IMM-3.03/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP3981IMM-3.03 is determined by strict equivalence across the following critical parameters:

• Output voltage: 3.03V fixed
• Maximum output current: 300mA
• Maximum input voltage: 6V
• Dropout voltage: 0.2V @ 300mA
• Package type: 8-VSSOP (8-TSSOP, 8-MSOP equivalent)
• Surface mount configuration
• Operating temperature range: -40°C ~ 125°C
• Protection features: Over Current, Over Temperature, Short Circuit
• Control features: Enable function

The LP3981IMM-3.03/NOPB is a parametric equivalent that meets all electrical and mechanical specifications. The primary distinction is product status and compliance classification.

Parameter Comparison

Engineering Selection Recommendations

The LP3981IMM-3.03/NOPB is the direct parametric equivalent for the LP3981IMM-3.03. Both parts are ROHS3 compliant and meet identical electrical and mechanical specifications. The key distinction is product status: the original part is Last Time Buy, while the substitute is Active. For new designs or ongoing production requiring supply continuity, the LP3981IMM-3.03/NOPB is the appropriate selection. Both parts carry EAR99 ECCN classification and are suitable for the same applications without design modification.

Frequently Asked Questions (FAQ)

Q: Can LP3981IMM-3.03/NOPB be used as a direct replacement for LP3981IMM-3.03?

A: Yes. Both parts are parametrically identical across all electrical specifications, output voltage, current rating, dropout voltage, and package configuration. No circuit modifications are required.

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

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free). Both the original and substitute parts are ROHS3 compliant and lead-free.

Q: Are there any differences in thermal or reliability characteristics?

A: No differences are specified in the provided parameters. Both parts operate across the same temperature range (-40°C ~ 125°C) and include identical protection features.

Q: Why is the original part marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number. The LP3981IMM-3.03/NOPB remains in active production and is the recommended alternative for continued supply.

Q: Is the 8-VSSOP package compatible with 8-TSSOP and 8-MSOP footprints?

A: The package designation 8-VSSOP is equivalent to 8-TSSOP and 8-MSOP with 0.118" width (3.00mm). These are the same physical package and are footprint-compatible.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant, carry EAR99 ECCN classification, and have Moisture Sensitivity Level 1 (Unlimited). The original part is REACH Affected; the substitute is REACH Unaffected.