LP3982IMMX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP3982IMMX-3.3/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications with 300mA current capacity. This device operates in the 8-VSSOP package and includes integrated protection features for over-current, over-temperature, and reverse polarity conditions. The part is currently classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	300mA
Input Voltage (Max)	6V
Voltage Dropout (Max)	0.22V @ 200mA
Quiescent Current	270 µA
Package Type	8-VSSOP / 8-TSSOP / 8-MSOP
Operating Temperature Range	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LP3982IMMX-3.3/NOPB is determined by the following critical parameters:

Output voltage fixed at 3.3V
Output current capacity of 300mA minimum
Maximum input voltage of 6V
Surface mount package compatibility (8-VSSOP, 8-TSSOP, or 8-MSOP)
Enable control feature
Operating temperature range of -40°C to 85°C minimum
Protection against over-current and over-temperature conditions

Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments and manufacturer-recommended alternatives from other suppliers. All identified substitutes maintain electrical compatibility within the specified parameter ranges.

Parameter Comparison

Parameter	LP3982IMMX-3.3/NOPB	LP3982IMM-3.3	LP3982IMM-3.3/NOPB	TC1107-3.3VUA
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Microchip Technology
Product Status	Obsolete	Last Time Buy	Active	Active
Output Voltage	3.3V	3.3V	3.3V	3.3V
Output Current	300mA	300mA	300mA	300mA
Input Voltage (Max)	6V	6V	6V	6V
Voltage Dropout (Max)	0.22V @ 200mA	0.22V @ 200mA	0.22V @ 200mA	0.48V @ 300mA
Quiescent Current	270 µA	270 µA	270 µA	90 µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Package	8-VSSOP	8-VSSOP	8-VSSOP	8-MSOP
Protection Features	OCP, OTP, Reverse Polarity	OCP, OTP, Reverse Polarity	OCP, OTP, Reverse Polarity	OCP, OTP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the obsolete LP3982IMMX-3.3/NOPB, the following selection criteria apply:

Primary Recommendation: LP3982IMM-3.3/NOPB (Texas Instruments, Active Status)

This part maintains identical electrical specifications and package compatibility with the original component. Active product status ensures long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

Secondary Recommendation: LP3982IMM-3.3 (Texas Instruments, Last Time Buy Status)

This variant provides parametric equivalence with identical electrical performance. Last Time Buy status indicates limited future availability; procurement should prioritize the Active status alternative.

Alternative Recommendation: TC1107-3.3VUA (Microchip Technology, Active Status)

This cross-manufacturer substitute meets core electrical requirements with identical output voltage and current capacity. The TC1107-3.3VUA operates across an extended temperature range (-40°C to 125°C) and features lower quiescent current (90 µA versus 270 µA). Package compatibility requires verification: the TC1107-3.3VUA uses 8-MSOP while the original uses 8-VSSOP. Reverse polarity protection is not included in this alternative.

Frequently Asked Questions (FAQ)

Q: Can LP3982IMM-3.3/NOPB directly replace LP3982IMMX-3.3/NOPB?

A: Yes. Both parts share identical electrical specifications, output voltage, current capacity, dropout voltage, quiescent current, and protection features. The primary difference is product status: the original is obsolete while the replacement is active. Pin-to-pin compatibility and package dimensions are equivalent.

Q: What are the key differences between Texas Instruments LP3982 variants and the Microchip TC1107-3.3VUA?

A: The TC1107-3.3VUA maintains 3.3V output and 300mA current capacity. Differences include: dropout voltage of 0.48V @ 300mA (versus 0.22V @ 200mA for LP3982), lower quiescent current of 90 µA, extended operating temperature to 125°C, and absence of reverse polarity protection. Package type differs: TC1107-3.3VUA uses 8-MSOP while LP3982 uses 8-VSSOP.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitutes—LP3982IMM-3.3, LP3982IMM-3.3/NOPB, and TC1107-3.3VUA—carry ROHS3 compliance certification and REACH unaffected status.

Q: What packaging options are available for substitutes?

A: LP3982IMM-3.3 and LP3982IMM-3.3/NOPB are supplied in 8-VSSOP packages with Cut Tape and Digi-Reel options. TC1107-3.3VUA is supplied in 8-MSOP package in Tube format. Physical package dimensions are equivalent (0.118" width, 3.00mm), but pin assignment verification is required when switching between VSSOP and MSOP variants.

Q: Which substitute offers the best long-term availability?

A: LP3982IMM-3.3/NOPB carries Active product status, indicating ongoing production and supply commitment. This part is the recommended choice for new designs and long-term procurement planning.

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