LP2982IM5X-5.0 Equivalent & Substitute Parts

Part Overview

The LP2982IM5X-5.0 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 5V output at 50mA in a SOT-23-5 surface mount package. This device is classified as Obsolete, making identification of suitable alternatives essential for ongoing production and design updates. The LP2982IM5X-5.0 provides positive fixed output regulation with integrated over-current, over-temperature, and short-circuit protection, operating across the industrial temperature range of -40°C to 125°C. Due to its obsolete status, equivalent active alternatives or higher-performance variants are necessary to ensure supply chain continuity and compliance with current RoHS standards.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2982IM5X-5.0
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	50mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.33V @ 80mA
Quiescent Current (Iq)	95 µA
PSRR	45dB (1kHz)
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Operating Temperature	-40°C ~ 125°C

Substitute Part Grouping Explanation

Substitution for the LP2982IM5X-5.0 is determined by the following critical parameters:

Primary Substitution Criteria:

Output voltage: 5V fixed
Output current capability: 50mA minimum
Input voltage range: 16V maximum
Package type: SOT-23-5 (SC-74A, SOT-753)
Mounting type: Surface mount
Protection features: Over-current, over-temperature, short-circuit
Operating temperature range: -40°C to 125°C

Substitution Categories:

Category 1 – Direct Parametric Equivalents (LP2980 Series): Parts LP2980AIM5-5.0, LP2980AIM5-5.0/NOPB, LP2980AIM5X-5.0/NOPB, LP2980IM5-5.0, LP2980IM5-5.0/NOPB, and LP2980IM5X-5.0/NOPB meet all electrical and mechanical parameters. These variants differ primarily in product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant). The LP2980 base series offers improved performance characteristics: lower dropout voltage (0.22V @ 50mA vs. 0.33V @ 80mA) and higher PSRR (63dB vs. 45dB at 1kHz).

Category 2 – Direct Parametric Equivalents (LP2982 Series): Parts LP2982AIM5-5.0/NOPB and LP2982AIM5X-5.0/NOPB maintain identical electrical specifications to the main part but offer Active product status and ROHS3 compliance. These are pin-compatible alternatives with the same dropout voltage and PSRR characteristics.

Category 3 – Higher Current Alternative: The LD2985BM50R from STMicroelectronics is a manufacturer-recommended alternative with increased output current capability (150mA vs. 50mA), maintaining the same 5V output, SOT-23-5 package, and operating temperature range. This part is suitable for applications requiring higher current delivery while maintaining form-factor compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	PSRR	Package	Product Status	RoHS Status
LP2982IM5X-5.0	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Obsolete	RoHS non-compliant
LP2980AIM5-5.0	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Last Time Buy	ROHS3 Compliant
LP2980AIM5-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant
LP2980AIM5X-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant
LP2980IM5-5.0	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Obsolete	ROHS3 Compliant
LP2980IM5-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant
LP2980IM5X-5.0/NOPB	Texas Instruments	5V	50mA	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant
LP2982AIM5-5.0/NOPB	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant
LP2982AIM5X-5.0/NOPB	Texas Instruments	5V	50mA	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant
LD2985BM50R	STMicroelectronics	5V	150mA	0.575V @ 150mA	150 µA	45dB (1kHz)	SOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

Select LP2980AIM5X-5.0/NOPB or LP2980IM5X-5.0/NOPB as primary alternatives. Both parts are Active status with ROHS3 compliance, offering superior electrical performance (lower dropout voltage and higher PSRR) compared to the obsolete LP2982IM5X-5.0. These variants provide the highest inventory availability (35,400 and 4,102 units respectively) and ensure long-term supply chain stability.

For Active Status with Identical Electrical Characteristics:

LP2982AIM5X-5.0/NOPB maintains the exact electrical specifications of the original part while offering Active product status and ROHS3 compliance. This option is suitable for designs where the specific LP2982 performance profile is required.

For Higher Current Applications:

The LD2985BM50R from STMicroelectronics provides 150mA output current in the same SOT-23-5 package. This part is appropriate only if the application can accommodate the increased dropout voltage (0.575V @ 150mA) and higher quiescent current (150 µA). Form-factor compatibility is maintained for PCB layout purposes.

Compliance Considerations:

All recommended Active alternatives carry ROHS3 compliance certification, addressing the non-compliance status of the original LP2982IM5X-5.0. The REACH Unaffected status is consistent across all substitutes.

Frequently Asked Questions (FAQ)

Q: Can LP2980AIM5X-5.0/NOPB directly replace LP2982IM5X-5.0 without circuit modification?

A: Yes. Both parts deliver 5V at 50mA in SOT-23-5 packages with identical pin configurations. The LP2980 variant offers improved performance (lower dropout voltage and higher PSRR) with no adverse effects on existing circuit designs. No component changes are required.

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

A: The /NOPB suffix indicates lead-free plating (no-lead, no-PbSn). Both parts are electrically identical. The /NOPB variant is the standard for current production and RoHS compliance.

Q: Why does the LD2985BM50R have higher dropout voltage than the LP2980 series?

A: The LD2985BM50R is rated for 150mA output current, compared to 50mA for the LP2980 series. Higher current capability inherently results in increased dropout voltage at maximum load. This part is suitable only if the application requires the additional current capacity.

Q: Are all substitute parts available in the same packaging options?

A: All recommended substitutes use SOT-23-5 (SC-74A, SOT-753) surface mount packages. Packaging options (Cut Tape, Digi-Reel, or Tape & Reel) vary by part number but do not affect electrical or mechanical compatibility.

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

A: LP2980AIM5X-5.0/NOPB has the highest inventory (35,400 units) and Active product status, ensuring sustained availability. This part is the recommended choice for new designs and production continuity.

Q: Is the LP2982AIM5-5.0/NOPB a suitable alternative if I need to maintain the exact original specifications?

A: Yes. LP2982AIM5-5.0/NOPB maintains identical electrical characteristics (0.33V dropout, 45dB PSRR) to the original LP2982IM5X-5.0 while offering Active status and ROHS3 compliance. This is the appropriate choice if the specific LP2982 performance profile is required for design validation or regulatory purposes.

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