LP2982IM5-5.0 Equivalent & Substitute Parts

Part Overview

The LP2982IM5-5.0 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 a maximum input voltage of 16V and dropout voltage of 0.33V @ 80mA. The device features enable control, over-current protection, over-temperature protection, and short-circuit protection, operating across the temperature range of -40°C to 125°C in a SOT-23-5 surface mount package.

The LP2982IM5-5.0 is currently listed as Obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this regulator.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	5V
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	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP2982IM5-5.0 are grouped based on strict electrical and mechanical parameter alignment:

Primary Substitution Criteria:

Fixed output voltage of 5V
Output current rating of 50mA
Maximum input voltage of 16V
SOT-23-5 package configuration
Enable control feature
Operating temperature range of -40°C to 125°C
Over-current, over-temperature, and short-circuit protection

Substitute Categories:

Category 1: Texas Instruments LP2980 Series (Parametric Equivalents) Parts meeting all primary criteria with improved electrical performance characteristics (lower dropout voltage, higher PSRR). These include LP2980AIM5-5.0, LP2980AIM5-5.0/NOPB, LP2980AIM5X-5.0/NOPB, LP2980IM5-5.0, LP2980IM5-5.0/NOPB, and LP2980IM5X-5.0/NOPB.

Category 2: Texas Instruments LP2982 Series (Direct Equivalents) Parts with identical electrical specifications to the main part. These include LP2982AIM5-5.0/NOPB, LP2982AIM5X-5.0/NOPB, and LP2982IM5-5.0/NOPB.

Category 3: Higher Current Alternative The STMicroelectronics LD2985BM50R is listed as a manufacturer-recommended alternative with increased output current capability (150mA vs. 50mA), suitable for applications requiring higher current delivery while maintaining the same 5V output and SOT-23-5 package.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	PSRR	Package	RoHS Status
LP2982IM5-5.0	Texas Instruments	Obsolete	5V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	RoHS non-compliant
LP2980AIM5-5.0	Texas Instruments	Last Time Buy	5V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2980AIM5-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2980AIM5X-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2980IM5-5.0	Texas Instruments	Obsolete	5V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2980IM5-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2980IM5X-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2982AIM5-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2982AIM5X-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	ROHS3 Compliant
LP2982IM5-5.0/NOPB	Texas Instruments	Active	5V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	ROHS3 Compliant
LD2985BM50R	STMicroelectronics	Active	5V	150mA	16V	0.575V @ 150mA	150 µA	45dB (1kHz)	SOT-23-5	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select LP2982AIM5-5.0/NOPB or LP2982IM5-5.0/NOPB. Both parts maintain identical electrical characteristics to the original LP2982IM5-5.0 while offering Active product status and ROHS3 compliance. The /NOPB designation indicates lead-free, halogen-free construction.

For Improved Performance (Lower Dropout Voltage, Higher PSRR): The LP2980 series (LP2980AIM5-5.0/NOPB, LP2980IM5-5.0/NOPB, LP2980IM5X-5.0/NOPB) provides superior electrical performance with 0.22V dropout voltage and 63dB PSRR while maintaining all other specifications. These parts are recommended for applications sensitive to dropout voltage or requiring enhanced noise rejection. All LP2980 variants carry Active status and ROHS3 compliance.

For Higher Current Applications: The STMicroelectronics LD2985BM50R is suitable only if the application requires 150mA output current. This part maintains the 5V output and SOT-23-5 package but exhibits higher dropout voltage (0.575V @ 150mA) and quiescent current (150 µA). Use only when increased current capacity is a design requirement.

Compliance Considerations: All recommended substitutes carry ROHS3 compliance and REACH Unaffected status. The original LP2982IM5-5.0 is RoHS non-compliant; migration to compliant alternatives is advisable for new designs and ongoing production.

Frequently Asked Questions (FAQ)

Q: Can LP2980 series parts directly replace the LP2982IM5-5.0? A: Yes. The LP2980 series maintains identical output voltage (5V), output current (50mA), input voltage rating (16V), package (SOT-23-5), and operating temperature range. The lower dropout voltage and higher PSRR represent performance improvements with no functional incompatibility.

Q: What is the difference between LP2982 and LP2980 series? A: Both series deliver 5V at 50mA in SOT-23-5 packages. The LP2980 series features lower dropout voltage (0.22V vs. 0.33V) and higher PSRR (63dB vs. 45dB). The LP2982 series maintains the original specifications. Selection depends on whether improved dropout and noise performance are required.

Q: Are the /NOPB variants functionally equivalent to non-/NOPB versions? A: Yes. The /NOPB designation indicates lead-free, halogen-free construction meeting RoHS requirements. Electrical and functional specifications are identical between /NOPB and non-/NOPB variants of the same base part number.

Q: Can the LD2985BM50R be used as a direct substitute? A: The LD2985BM50R is not a direct substitute. While it maintains 5V output and SOT-23-5 packaging, it is rated for 150mA output current versus 50mA. Use only if the application requires higher current delivery. The increased dropout voltage and quiescent current must be evaluated for circuit compatibility.

Q: What does the "X" designation in part numbers like LP2980AIM5X-5.0/NOPB indicate? A: The "X" designation indicates an extended temperature or performance variant within the same base part family. Electrical specifications remain identical to non-X versions. Consult the specific datasheet for any extended parameter ranges.

Q: Which substitute offers the best availability? A: LP2980AIM5X-5.0/NOPB and LP2980IM5X-5.0/NOPB show the highest inventory levels (35,400 and 4,102 units respectively) among Active status parts. LP2980AIM5-5.0/NOPB and LP2980IM5-5.0/NOPB also maintain substantial Active inventory (17,100 and 13,220 units).

Q: Are all substitute parts suitable for new designs? A: Parts with Active product status are suitable for new designs: LP2980AIM5-5.0/NOPB, LP2980AIM5X-5.0/NOPB, LP2980IM5-5.0/NOPB, LP2980IM5X-5.0/NOPB, LP2982AIM5-5.0/NOPB, LP2982AIM5X-5.0/NOPB, LP2982IM5-5.0/NOPB, and LD2985BM50R. Parts with Last Time Buy or Obsolete status are suitable only for sustaining production of existing designs.

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