LP3982IMMX-1.8 Equivalent & Substitute Parts

Part Overview

The LP3982IMMX-1.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output applications with 300mA current capacity in an 8-VSSOP surface mount package. The main part number is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The LP3982 series provides regulated 1.8V output with integrated protection features including over-current, over-temperature, and reverse polarity protection, suitable for low-power applications requiring stable voltage regulation.

Substiute Parts

LP3982IMMX-1.8

Texas InstrumentsIn Stock: 19259LP3982IMMX-1.8 Datasheet

Current PartRFQ

LP3982IMMX-1.8/NOPB

Texas InstrumentsIn Stock: 5861LP3982IMMX-1.8/NOPB Datasheet

DirectRFQ

LP3982IMM-1.8/NOPB

Texas InstrumentsIn Stock: 15869LP3982IMM-1.8/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP3982IMMX-1.8 is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Fixed output voltage of 1.8V
• Minimum output current rating of 300mA
• Maximum input voltage of 6V or greater
• Voltage dropout specification of 0.22V @ 200mA or lower
• Quiescent current of 270 µA or lower
• Positive fixed output configuration with single regulator
• Protection features: Over Current, Over Temperature, Reverse Polarity
• Enable control feature
• Operating temperature range: -40°C ~ 85°C minimum
• Surface mount package in 8-TSSOP, 8-MSOP form factor

Identified Substitutes:

1. LP3982IMMX-1.8/NOPB – Direct manufacturer equivalent with identical electrical specifications and same package. Active product status with RoHS3 compliance.

2. LP3982IMM-1.8/NOPB – Parametric equivalent with identical electrical specifications and same package. Active product status with RoHS3 compliance. Packaging format differs (Tape & Reel vs. Cut Tape).

Parameter Comparison

Engineering Selection Recommendations

LP3982IMMX-1.8/NOPB is the primary substitute for LP3982IMMX-1.8. This part maintains identical electrical and mechanical specifications while offering active product status and RoHS3 compliance. The /NOPB designation indicates lead-free construction, meeting modern environmental and regulatory requirements. Packaging is available in Cut Tape and Digi-Reel formats.

LP3982IMM-1.8/NOPB is a secondary equivalent option with identical electrical performance and RoHS3 compliance. The primary difference is packaging format (Tape & Reel), which may affect procurement logistics but does not impact electrical or mechanical compatibility. This part is also in active production status.

Both substitute parts eliminate the obsolescence risk associated with the original LP3982IMMX-1.8 while maintaining full functional and physical compatibility for 1.8V, 300mA linear regulation applications.

Frequently Asked Questions (FAQ)

Q: Can LP3982IMMX-1.8/NOPB be used as a direct replacement for LP3982IMMX-1.8?

A: Yes. Both parts share identical electrical specifications (1.8V output, 300mA current, 0.22V dropout, 270 µA quiescent current) and the same 8-VSSOP package. The primary advantage of the /NOPB variant is active product status and RoHS3 compliance.

Q: What is the difference between LP3982IMMX-1.8/NOPB and LP3982IMM-1.8/NOPB?

A: Electrical and mechanical specifications are identical. The difference is packaging format: LP3982IMMX-1.8/NOPB is supplied in Cut Tape and Digi-Reel, while LP3982IMM-1.8/NOPB is supplied in Tape & Reel. Both are surface mount in the same 8-VSSOP package.

Q: Are there any compliance differences between the original part and substitutes?

A: Yes. The original LP3982IMMX-1.8 is RoHS non-compliant, while both substitute parts (LP3982IMMX-1.8/NOPB and LP3982IMM-1.8/NOPB) are RoHS3 compliant. Both substitutes are REACH Unaffected. For applications requiring RoHS compliance, the substitutes are required.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. All three parts use the same 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) package and have identical pin configurations. No PCB layout modifications are required when substituting between these parts.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling.

Q: Are there any temperature or environmental limitations?

A: All three parts operate across the same temperature range: -40°C to 85°C. No environmental limitations differ between the original and substitute parts.