LP2980AIM5-3.3 Equivalent & Substitute Parts

Part Overview

The LP2980AIM5-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 50mA in SOT-23-5 surface mount packaging. This part is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain flexibility for applications requiring 3.3V regulation with low quiescent current and integrated protection features.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	50mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.22V @ 50mA
Quiescent Current	95 µA
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2980AIM5-3.3 are grouped based on strict electrical and mechanical parameter matching:

Group 1: Parametric Equivalents (Texas Instruments LP2980 Series) These parts share identical electrical specifications with the main part: 3.3V fixed output, 50mA current, 0.22V dropout at 50mA, 95 µA quiescent current, and SOT-23-5 packaging. Differences exist only in product status (Active vs. Last Time Buy) and packaging format (Cut Tape vs. Tape & Reel). Parts in this group are direct pin-for-pin and functionally equivalent replacements.

Group 2: Parametric Equivalents (Texas Instruments LP2982 Series) These parts maintain the same output voltage (3.3V), output current (50mA), quiescent current (95 µA), and SOT-23-5 packaging. However, they exhibit slightly different electrical characteristics: 0.33V dropout at 80mA (versus 0.22V at 50mA) and 1.4 mA maximum supply current (versus 1.2 mA). PSRR is reduced to 45dB at 1kHz. These parts are suitable for applications where the slightly higher dropout voltage is acceptable.

Group 3: Cross-Manufacturer Equivalent (STMicroelectronics LD2980ABM33TR) This part from STMicroelectronics provides equivalent functionality with 3.3V output, 50mA current, and SOT-23-5 packaging. The dropout voltage is 0.225V at 50mA (comparable to the main part). Quiescent current is 150 µA (higher than the main part's 95 µA). Protection features include Over Current and Over Temperature, with Short Circuit protection not explicitly listed. This part is recommended by the manufacturer as an alternative source.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	PSRR (1kHz)	Product Status	Inventory
LP2980AIM5-3.3	Texas Instruments	3.3V	50mA	0.22V @ 50mA	95 µA	63dB	Last Time Buy	3,300 Pcs
LP2980AIM5-3.3/NOPB	Texas Instruments	3.3V	50mA	0.22V @ 50mA	95 µA	63dB	Active	4,152 Pcs
LP2980AIM5X-3.3/NOPB	Texas Instruments	3.3V	50mA	0.22V @ 50mA	95 µA	63dB	Active	1,352 Pcs
LP2980IM5-3.3	Texas Instruments	3.3V	50mA	0.22V @ 50mA	95 µA	63dB	Last Time Buy	10,300 Pcs
LP2980IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	0.22V @ 50mA	95 µA	63dB	Active	16,200 Pcs
LP2980IM5X-3.3/NOPB	Texas Instruments	3.3V	50mA	0.22V @ 50mA	95 µA	63dB	Active	19,789 Pcs
LP2982AIM5-3.3/NOPB	Texas Instruments	3.3V	50mA	0.33V @ 80mA	95 µA	45dB	Active	1,599 Pcs
LP2982AIM5X-3.3/NOPB	National Semiconductor	3.3V	50mA	0.33V @ 80mA	95 µA	45dB	Active	8,100 Pcs
LP2982IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	0.33V @ 80mA	95 µA	45dB	Active	4,501 Pcs
LP2982IM5X-3.3/NOPB	National Semiconductor	3.3V	50mA	0.33V @ 80mA	95 µA	45dB	Active	9,800 Pcs
LD2980ABM33TR	STMicroelectronics	3.3V	50mA	0.225V @ 50mA	150 µA	63dB	Active	29,400 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): Select LP2980IM5-3.3/NOPB or LP2980IM5X-3.3/NOPB. Both parts maintain all electrical specifications of the main part and carry Active product status, ensuring long-term availability. LP2980IM5-3.3/NOPB offers the highest inventory (16,200 Pcs), while LP2980IM5X-3.3/NOPB provides the largest stock (19,789 Pcs) with Tape & Reel packaging suitable for automated assembly.

For Applications Tolerant of Higher Dropout Voltage: The LP2982 series (LP2982AIM5-3.3/NOPB, LP2982IM5-3.3/NOPB) is suitable when the 0.33V dropout voltage at 80mA is acceptable. These parts maintain the same output voltage and quiescent current but exhibit reduced PSRR (45dB versus 63dB). All LP2982 variants carry Active product status.

For Cross-Manufacturer Sourcing: LD2980ABM33TR from STMicroelectronics provides equivalent 3.3V regulation with comparable dropout voltage (0.225V at 50mA). This part carries ROHS3 compliance and Active product status. The higher quiescent current (150 µA versus 95 µA) should be evaluated for battery-powered applications. Inventory availability is substantial at 29,400 Pcs.

All substitute parts are ROHS3 compliant, carry EAR99 ECCN classification, and operate across the -40°C to 125°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can LP2980AIM5-3.3 be replaced with LP2980IM5-3.3/NOPB? A: Yes. Both parts share identical electrical specifications: 3.3V output, 50mA current, 0.22V dropout at 50mA, 95 µA quiescent current, and SOT-23-5 packaging. The primary difference is product status (Last Time Buy versus Active) and packaging format. LP2980IM5-3.3/NOPB is recommended for new designs due to its Active status.

Q: What is the difference between LP2980 and LP2982 series? A: The LP2982 series exhibits higher dropout voltage (0.33V at 80mA versus 0.22V at 50mA) and reduced PSRR (45dB versus 63dB at 1kHz). Both maintain 3.3V output, 50mA current, and 95 µA quiescent current. LP2982 is suitable for applications where the higher dropout voltage does not impact performance.

Q: Is LD2980ABM33TR from STMicroelectronics a direct replacement? A: LD2980ABM33TR provides functional equivalence with 3.3V output, 50mA current, and comparable dropout voltage (0.225V at 50mA). However, quiescent current is higher at 150 µA (versus 95 µA). This difference should be evaluated for low-power applications. Pin configuration and SOT-23-5 packaging are identical.

Q: What does the "/NOPB" suffix indicate? A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, confirming ROHS3 compliance. Parts with and without this suffix are functionally equivalent; the suffix denotes manufacturing and environmental compliance standards.

Q: Which substitute part offers the best inventory availability? A: LP2980IM5X-3.3/NOPB provides the highest inventory at 19,789 Pcs, followed by LD2980ABM33TR at 29,400 Pcs. For Texas Instruments LP2980 series equivalents, LP2980IM5-3.3/NOPB offers 16,200 Pcs.

Q: Are all substitute parts suitable for automated assembly? A: Parts specified with Tape & Reel (TR) packaging are optimized for automated pick-and-place assembly. LP2980IM5X-3.3/NOPB and LP2982IM5X-3.3/NOPB are supplied in Tape & Reel format. Parts specified as Cut Tape (CT) & Digi-Reel® or Bulk require manual handling or reel conversion.

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