LP2982AIM5-5.0 Equivalent & Substitute Parts

Part Overview

The LP2982AIM5-5.0 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 5V output at 50mA with SOT-23-5 surface mount packaging. The device features enable control, over-current protection, over-temperature protection, and short-circuit protection across an operating temperature range of -40°C to 125°C.

The LP2982AIM5-5.0 is currently listed as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives with identical or superior electrical characteristics are available from the same manufacturer.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution for the LP2982AIM5-5.0 is determined by the following critical parameters:

Fixed output voltage of 5V
Output current capability of 50mA minimum
SOT-23-5 package compatibility
Maximum input voltage of 16V or greater
Enable control functionality
Protection features (over-current, over-temperature, short-circuit)
Operating temperature range of -40°C to 125°C

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents (Texas Instruments LP2980 and LP2982 Series) These parts maintain identical electrical specifications and package form factors. The LP2980 series offers improved performance characteristics (lower dropout voltage, higher PSRR) while maintaining full compatibility. Parts with "/NOPB" designation indicate lead-free, RoHS3-compliant versions. Parts with "X" suffix indicate extended temperature or tape & reel packaging variants.

Category 2: Manufacturer Recommended Alternative (STMicroelectronics LD2985BM50R) This part exceeds the output current specification (150mA vs. 50mA) and is suitable for applications requiring higher current delivery while maintaining the same 5V output and SOT-23-5 package.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage (Max)	Quiescent Current	PSRR	Product Status	RoHS Status
LP2982AIM5-5.0	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	Obsolete	Non-compliant
LP2980AIM5-5.0	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	Last Time Buy	ROHS3 Compliant
LP2980AIM5-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	Active	ROHS3 Compliant
LP2980AIM5X-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	Active	ROHS3 Compliant
LP2980IM5-5.0	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	Obsolete	ROHS3 Compliant
LP2980IM5-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	Active	ROHS3 Compliant
LP2980IM5X-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	Active	ROHS3 Compliant
LP2982AIM5-5.0/NOPB	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	Active	ROHS3 Compliant
LP2982AIM5X-5.0/NOPB	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	Active	ROHS3 Compliant
LP2982IM5-5.0/NOPB	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	Active	ROHS3 Compliant
LD2985BM50R	STMicroelectronics	5V	150mA	0.575V @ 150mA	150 µA	45dB (1kHz)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Texas Instruments LP2980 Series)

The LP2980AIM5-5.0/NOPB and LP2980AIM5X-5.0/NOPB are the preferred direct replacements for the obsolete LP2982AIM5-5.0. These parts deliver superior electrical performance with lower dropout voltage (0.22V vs. 0.33V) and higher PSRR (63dB vs. 45dB), while maintaining identical output voltage, current rating, and package form factor. Both parts are Active status with ROHS3 compliance, ensuring long-term supply availability and regulatory compliance.

The LP2980IM5-5.0/NOPB and LP2980IM5X-5.0/NOPB offer identical electrical specifications to the LP2980A variants with different temperature or packaging designations. Selection between these variants depends on specific procurement and packaging requirements.

Secondary Substitutes (Texas Instruments LP2982 Series)

The LP2982AIM5-5.0/NOPB, LP2982AIM5X-5.0/NOPB, and LP2982IM5-5.0/NOPB maintain the exact electrical characteristics of the original LP2982AIM5-5.0 part. These Active status alternatives provide direct compatibility with existing designs while offering ROHS3 compliance. These parts are suitable when design validation has been performed against the original LP2982 specifications.

Higher Current Alternative (STMicroelectronics LD2985BM50R)

The LD2985BM50R is suitable for applications requiring output current exceeding 50mA. This part delivers 150mA output current in the same SOT-23-5 package with identical 5V output voltage. The higher quiescent current (150 µA vs. 95 µA) and increased dropout voltage (0.575V @ 150mA) must be evaluated against application power budget and thermal requirements. This part is Active status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LP2982AIM5-5.0 with LP2980AIM5-5.0/NOPB?

A: Yes. Both parts deliver 5V at 50mA in SOT-23-5 packaging with identical pin configuration and control features. The LP2980AIM5-5.0/NOPB offers improved performance (lower dropout voltage and higher PSRR) and is Active status with ROHS3 compliance, making it the preferred replacement for the obsolete LP2982AIM5-5.0.

Q: What is the difference between LP2980AIM5-5.0 and LP2980AIM5-5.0/NOPB?

A: The "/NOPB" designation indicates a lead-free, RoHS3-compliant version. Both parts are electrically identical. The /NOPB variant is recommended for new designs and applications requiring regulatory compliance.

Q: What does the "X" suffix in part numbers like LP2980AIM5X-5.0/NOPB indicate?

A: The "X" suffix typically indicates extended temperature range or alternative packaging configuration (such as Tape & Reel). Electrical specifications remain identical to the non-X variant. Verify specific packaging requirements before selection.

Q: Can I use LD2985BM50R as a drop-in replacement?

A: The LD2985BM50R is package-compatible (SOT-23-5) and pin-compatible with identical 5V output. However, it delivers 150mA output current versus 50mA for the LP2982AIM5-5.0. This higher current capability may introduce different thermal characteristics and quiescent current draw. Verify application requirements before substitution.

Q: Why is the original LP2982AIM5-5.0 listed as Obsolete?

A: The LP2982AIM5-5.0 has reached end-of-life status. Texas Instruments continues to offer equivalent functionality through the Active LP2980 and LP2982 series variants with improved specifications and regulatory compliance.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended substitute parts are ROHS3 compliant. The original LP2982AIM5-5.0 is listed as RoHS non-compliant. Compliance is an important consideration for new designs and applications subject to regulatory requirements.

Q: What inventory levels should I consider for long-term supply?

A: The LP2980AIM5X-5.0/NOPB has the highest inventory (35,400 pcs), followed by LP2980AIM5-5.0/NOPB (17,100 pcs) and LP2980IM5-5.0/NOPB (13,220 pcs). These Active status parts with substantial inventory provide reliable long-term supply assurance.

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