LP2982AIM5-3.3 Equivalent & Substitute Parts

Part Overview

The LP2982AIM5-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 50mA in a SOT-23-5 surface mount package. This device is classified as "Not For New Designs," indicating it has reached end-of-life status. The part provides essential power management functionality with integrated over-current, over-temperature, and short-circuit protection, making it suitable for legacy system maintenance and repair applications where direct equivalents are required.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	50mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.33V @ 80mA
Quiescent Current	95 µA
PSRR	45dB (1kHz)
Package	SOT-23-5 (SC-74A)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP2982AIM5-3.3 are grouped into two categories based on electrical performance characteristics:

Category 1: LP2980 Series (Improved Performance) Parts LP2980AIM5-3.3, LP2980AIM5-3.3/NOPB, LP2980AIM5X-3.3/NOPB, LP2980IM5-3.3, LP2980IM5-3.3/NOPB, and LP2980IM5X-3.3/NOPB share identical electrical specifications with the main part except for improved dropout voltage (0.22V @ 50mA versus 0.33V @ 80mA) and enhanced PSRR (63dB versus 45dB at 1kHz). These parts maintain the same 50mA output current, 3.3V fixed output, 16V maximum input voltage, and SOT-23-5 package configuration. The LP2980 variants are available in Active product status with RoHS3 compliance.

Category 2: LP2982 Series (Identical Specifications) Parts LP2982AIM5-3.3/NOPB, LP2982IM5-3.3/NOPB, LP2982AIM5X-3.3/NOPB, and LP2982IM5X-3.3/NOPB provide exact electrical equivalence to the main part, with identical dropout voltage, PSRR, and all other performance parameters. These variants differ only in packaging format (Cut Tape, Tape & Reel, or Bulk) and product status designations.

Substitution eligibility is determined by: output voltage match (3.3V), output current capability (50mA minimum), input voltage rating (16V minimum), package type (SOT-23-5), and operating temperature range (-40°C to 125°C).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	PSRR	Package	Product Status	RoHS Status
LP2982AIM5-3.3	Texas Instruments	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Not For New Designs	RoHS non-compliant
LP2980AIM5-3.3	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Last Time Buy	RoHS3 Compliant
LP2980AIM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	RoHS3 Compliant
LP2980AIM5X-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	RoHS3 Compliant
LP2980IM5-3.3	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Last Time Buy	RoHS3 Compliant
LP2980IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	RoHS3 Compliant
LP2980IM5X-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	RoHS3 Compliant
LP2982AIM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	RoHS3 Compliant
LP2982AIM5X-3.3/NOPB	National Semiconductor	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	Not specified
LP2982IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	RoHS3 Compliant
LP2982IM5X-3.3/NOPB	National Semiconductor	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	Not specified

Engineering Selection Recommendations

For new production designs, LP2980AIM5-3.3/NOPB or LP2980IM5-3.3/NOPB are the preferred selections due to Active product status and RoHS3 compliance. These parts offer improved electrical performance with lower dropout voltage and higher PSRR while maintaining full compatibility with the LP2982AIM5-3.3 footprint and pinout.

For legacy system repairs and maintenance where the original LP2982AIM5-3.3 is no longer available, LP2982AIM5-3.3/NOPB or LP2982IM5-3.3/NOPB provide exact electrical equivalence with Active status and RoHS3 compliance. These variants are direct replacements with identical performance characteristics.

LP2980 series parts are suitable for applications where improved dropout voltage performance (0.22V versus 0.33V) and enhanced noise rejection (63dB versus 45dB PSRR) provide system benefits. All recommended substitutes maintain the same SOT-23-5 package, 50mA output current, 3.3V fixed output voltage, and -40°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can LP2980 series parts directly replace LP2982AIM5-3.3? A: Yes. LP2980 variants are pin-compatible and functionally compatible substitutes. The lower dropout voltage and improved PSRR of the LP2980 series provide equal or superior performance in the same SOT-23-5 package. No circuit modifications are required.

Q: What is the difference between LP2982AIM5-3.3 and LP2982AIM5-3.3/NOPB? A: Both parts have identical electrical specifications and SOT-23-5 packaging. The /NOPB suffix indicates the part is supplied without lead (Pb) and is RoHS3 compliant. LP2982AIM5-3.3/NOPB is available in Active status, while the original LP2982AIM5-3.3 is Not For New Designs.

Q: Are there packaging format differences among the substitute parts? A: Yes. Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel, Tape & Reel (TR), and Bulk. The electrical specifications and SOT-23-5 component package remain identical across all formats. Select the packaging format based on procurement and assembly requirements.

Q: Which substitute part has the best availability? A: LP2980IM5X-3.3/NOPB has the highest inventory (19,789 pcs) among all substitutes. LP2980IM5-3.3/NOPB (16,200 pcs) and LP2980IM5-3.3 (10,300 pcs) also provide strong availability for immediate procurement.

Q: Is RoHS compliance a factor in selecting a substitute? A: Yes. The original LP2982AIM5-3.3 is RoHS non-compliant. All recommended Active status substitutes (LP2980 and LP2982 series with /NOPB designation) are RoHS3 compliant, meeting current environmental and regulatory requirements for new designs and production systems.

Q: Can LP2982AIM5X-3.3/NOPB or LP2982IM5X-3.3/NOPB be used as substitutes? A: These National Semiconductor variants provide exact electrical equivalence to the original LP2982AIM5-3.3 with Active product status. However, RoHS compliance status is not specified for these parts. Verify compliance requirements with your procurement or quality department before selection.

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