LP2982IM5-3.0 Equivalent & Substitute Parts

Part Overview

The LP2982IM5-3.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output at 50mA in a SOT-23-5 surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The LP2982IM5-3.0 provides Enable control, Over Current, Over Temperature, and Short Circuit protection across an operating temperature range of -40°C to 125°C.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	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)
Control Features	Enable
Protection	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C to 125°C

Substitute Part Grouping Explanation

Substitution for the LP2982IM5-3.0 is determined by the following critical parameters:

Output voltage fixed at 3V
Output current capability of 50mA minimum
Input voltage tolerance up to 16V
SOT-23-5 package compatibility
Enable control feature
Protection features (Over Current, Over Temperature, Short Circuit)
Operating temperature range -40°C to 125°C

Substitute parts are grouped into two categories:

Category 1: Direct Parametric Equivalents (LP2980 Series) Parts with identical electrical specifications to the LP2982IM5-3.0, including improved dropout voltage performance (0.22V @ 50mA vs. 0.33V @ 80mA) and higher PSRR (63dB vs. 45dB). These parts maintain the same 50mA output current, 3V fixed output, and SOT-23-5 package.

Category 2: Higher Current Alternatives Parts with increased output current capability (150mA or 500mA) while maintaining 3V fixed output and SOT-23-5 package compatibility. These are suitable for applications requiring higher current delivery.

Parameter Comparison

Part Number	Manufacturer	Output Current	Dropout Voltage (Max)	PSRR	Quiescent Current	Product Status	RoHS Status
LP2982IM5-3.0	Texas Instruments	50mA	0.33V @ 80mA	45dB (1kHz)	95 µA	Obsolete	Non-compliant
LP2980IM5-3.0/NOPB	Texas Instruments	50mA	0.22V @ 50mA	63dB (1kHz)	95 µA	Active	ROHS3 Compliant
LP2980AIM5-3.0/NOPB	Texas Instruments	50mA	0.22V @ 50mA	63dB (1kHz)	95 µA	Active	ROHS3 Compliant
LP2980AIM5X-3.0/NOPB	Texas Instruments	50mA	0.22V @ 50mA	63dB (1kHz)	95 µA	Active	ROHS3 Compliant
LP2980IM5X-3.0/NOPB	National Semiconductor	50mA	0.22V @ 50mA	63dB (1kHz)	95 µA	Active	Not specified
LP2982AIM5-3.0/NOPB	Texas Instruments	50mA	0.33V @ 80mA	45dB (1kHz)	95 µA	Obsolete	ROHS3 Compliant
LP2982AIM5X-3.0/NOPB	Texas Instruments	50mA	0.33V @ 80mA	45dB (1kHz)	95 µA	Active	ROHS3 Compliant
LP2982IM5X-3.0/NOPB	Texas Instruments	50mA	0.33V @ 80mA	45dB (1kHz)	95 µA	Active	ROHS3 Compliant
LD2985BM30R	STMicroelectronics	150mA	0.575V @ 150mA	45dB (1kHz)	150 µA	Active	ROHS3 Compliant
SPX3819M5-L-3-0/TR	MaxLinear, Inc.	500mA	0.7V @ 500mA	Not specified	8 µA	Active	RoHS Compliant

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Choice): LP2980IM5-3.0/NOPB, LP2980AIM5-3.0/NOPB, or LP2980AIM5X-3.0/NOPB are the preferred substitutes. These parts maintain identical 50mA output current and 3V fixed output specifications while offering improved performance characteristics (lower dropout voltage and higher PSRR). All three are Active status products with ROHS3 compliance, addressing the RoHS non-compliance limitation of the obsolete LP2982IM5-3.0.

For Active Status with Identical Specifications: LP2982AIM5X-3.0/NOPB and LP2982IM5X-3.0/NOPB maintain the exact electrical characteristics of the original LP2982IM5-3.0 while offering Active product status and ROHS3 compliance. These are suitable for designs requiring the specific dropout voltage and PSRR characteristics of the LP2982 series.

For Higher Current Applications: LD2985BM30R (150mA) and SPX3819M5-L-3-0/TR (500mA) are suitable only when application requirements permit increased output current capability. These parts maintain 3V fixed output and SOT-23-5 package compatibility but introduce higher quiescent current and dropout voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can LP2980 series parts directly replace the LP2982IM5-3.0? A: Yes. LP2980IM5-3.0/NOPB, LP2980AIM5-3.0/NOPB, and LP2980AIM5X-3.0/NOPB are direct parametric equivalents with identical 50mA output current and 3V fixed output. They offer superior performance with lower dropout voltage (0.22V vs. 0.33V) and higher PSRR (63dB vs. 45dB).

Q: What is the difference between LP2982AIM5X-3.0/NOPB and LP2980AIM5X-3.0/NOPB? A: Both maintain 50mA output current and 3V fixed output in SOT-23-5 packages. The LP2982 variant retains the original dropout voltage (0.33V @ 80mA) and PSRR (45dB), while the LP2980 variant provides improved dropout voltage (0.22V @ 50mA) and PSRR (63dB).

Q: Are all substitute parts available in the same packaging? A: All substitute parts use SOT-23-5 (SC-74A) surface mount packaging. Packaging options (Cut Tape, Tape & Reel, Bulk) vary by part number and supplier, but the physical package remains compatible.

Q: Can I use LD2985BM30R or SPX3819M5-L-3-0/TR as direct replacements? A: These parts are not direct replacements. They provide higher output current (150mA and 500mA respectively) and are suitable only if your application can accommodate increased quiescent current and higher dropout voltage characteristics.

Q: What is the RoHS compliance status of available substitutes? A: LP2980 series parts (LP2980IM5-3.0/NOPB, LP2980AIM5-3.0/NOPB, LP2980AIM5X-3.0/NOPB) and LP2982 variants (LP2982AIM5-3.0/NOPB, LP2982AIM5X-3.0/NOPB, LP2982IM5X-3.0/NOPB) are ROHS3 compliant. LD2985BM30R is ROHS3 compliant. SPX3819M5-L-3-0/TR is RoHS compliant.

Q: Which substitute offers the best performance improvement over the original LP2982IM5-3.0? A: LP2980IM5-3.0/NOPB provides the most significant performance improvement with 33% lower dropout voltage (0.22V vs. 0.33V) and 40% higher PSRR (63dB vs. 45dB) while maintaining identical output current and voltage specifications.

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