LP2980AIM5X-3.3 Equivalent & Substitute Parts

Part Overview

The LP2980AIM5X-3.3 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) device. It delivers a fixed 3.3V output at 50mA with a maximum input voltage of 16V and a dropout voltage of 0.22V at 50mA. The device features integrated protection against overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications.

This part carries a Last Time Buy product status, indicating that Texas Instruments has discontinued or will discontinue production. Component engineers and procurement teams must identify equivalent alternatives to ensure design continuity and supply chain reliability for new production runs and long-term inventory planning.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	50mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.22V @ 50mA
Quiescent Current (Iq)	95 µA
PSRR	63dB (1kHz)
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
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LP2980AIM5X-3.3 is determined by the following critical parameters:

Primary Substitution Criteria:

Fixed output voltage of 3.3V
Output current capability of 50mA minimum
Maximum input voltage of 16V or greater
SOT-23-5 package compatibility
Surface mount mounting type
Operating temperature range of -40°C to 125°C
Enable control feature
Protection features: Over Current, Over Temperature, Short Circuit

Substitution Groups:

Group 1: Direct LP2980 Series Equivalents Parts LP2980AIM5-3.3, LP2980AIM5-3.3/NOPB, LP2980AIM5X-3.3/NOPB, LP2980IM5-3.3, LP2980IM5-3.3/NOPB, and LP2980IM5X-3.3/NOPB are parametrically identical to the main part. These variants differ only in packaging format (Cut Tape vs. Tape & Reel) and lead-free processing designation (/NOPB suffix). All maintain identical electrical specifications including 0.22V dropout voltage at 50mA and 63dB PSRR at 1kHz.

Group 2: LP2982 Series Alternatives Parts LP2982AIM5-3.3/NOPB, LP2982AIM5X-3.3/NOPB, LP2982IM5-3.3/NOPB, and LP2982IM5X-3.3/NOPB meet the core substitution criteria with functional equivalence. These parts maintain the same output voltage, current rating, input voltage range, package type, and protection features. However, they exhibit higher dropout voltage (0.33V @ 80mA versus 0.22V @ 50mA) and lower PSRR (45dB versus 63dB at 1kHz), representing acceptable trade-offs in applications where these performance differences do not impact circuit operation.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	PSRR	Package	Product Status	Inventory
LP2980AIM5X-3.3	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Last Time Buy	4100 Pcs
LP2980AIM5-3.3	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Last Time Buy	3300 Pcs
LP2980AIM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	4152 Pcs
LP2980AIM5X-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	1352 Pcs
LP2980IM5-3.3	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Last Time Buy	10300 Pcs
LP2980IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	16200 Pcs
LP2980IM5X-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.22V @ 50mA	95 µA	63dB (1kHz)	SOT-23-5	Active	19789 Pcs
LP2982AIM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	1599 Pcs
LP2982AIM5X-3.3/NOPB	National Semiconductor	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	8100 Pcs
LP2982IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	4501 Pcs
LP2982IM5X-3.3/NOPB	National Semiconductor	3.3V	50mA	16V	0.33V @ 80mA	95 µA	45dB (1kHz)	SOT-23-5	Active	9800 Pcs

Engineering Selection Recommendations

Primary Selection Path: LP2980 Series (Direct Equivalents)

For applications requiring exact electrical performance match, select from the LP2980 series variants. LP2980IM5-3.3/NOPB and LP2980IM5X-3.3/NOPB are preferred due to Active product status and highest available inventory (16200 Pcs and 19789 Pcs respectively). These parts maintain identical dropout voltage and PSRR specifications, ensuring no circuit redesign is required. The /NOPB designation indicates lead-free processing, meeting ROHS3 compliance requirements.

Secondary Selection Path: LP2982 Series (Functional Alternatives)

When LP2980 series availability is constrained, LP2982 series parts provide functional substitution with acceptable performance trade-offs. LP2982IM5X-3.3/NOPB offers the highest inventory (9800 Pcs) among LP2982 variants. The increased dropout voltage (0.33V @ 80mA) and reduced PSRR (45dB) are acceptable in applications where input voltage headroom exceeds 0.33V above the 3.3V output requirement and noise rejection at 1kHz is not a critical design parameter.

Packaging Considerations

All substitute parts are available in SOT-23-5 package format with identical pinout and footprint compatibility. Packaging format differences (Cut Tape vs. Tape & Reel) do not affect electrical performance and are determined by procurement and assembly requirements.

Compliance and Certification

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited moisture sensitivity), and identical ECCN/HTSUS classifications. No additional qualification or testing is required from a regulatory standpoint.

Frequently Asked Questions (FAQ)

Q: Can LP2982 series parts directly replace LP2980AIM5X-3.3 without circuit modification?

A: LP2982 series parts are functionally compatible substitutes that maintain the same output voltage, current rating, package, and protection features. However, the higher dropout voltage (0.33V versus 0.22V) requires verification that your input voltage provides sufficient headroom. If your circuit operates with input voltage margins greater than 0.33V above 3.3V output, substitution is direct. If margins are tighter, circuit redesign may be necessary.

Q: What is the difference between LP2980AIM5X-3.3 and LP2980IM5X-3.3/NOPB?

A: Both parts are electrically identical with the same output voltage, current rating, dropout voltage, and PSRR. The differences are: (1) Product Status—LP2980AIM5X-3.3 is Last Time Buy while LP2980IM5X-3.3/NOPB is Active; (2) Packaging format—the main part uses Cut Tape while the /NOPB variant uses Tape & Reel; (3) Lead-free processing—the /NOPB designation confirms lead-free manufacturing. For new designs, LP2980IM5X-3.3/NOPB is the recommended choice due to Active status and higher inventory.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification. Parts with the /NOPB suffix explicitly indicate lead-free processing. Compliance documentation is available from Texas Instruments and National Semiconductor.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates "No Plumbum" (no lead) processing, confirming lead-free manufacturing and RoHS compliance. This designation is standard for components manufactured after RoHS directive implementation and is required for most commercial and industrial applications.

Q: Can I use LP2980 and LP2982 series parts interchangeably in the same design?

A: LP2980 and LP2982 series parts are not interchangeable without circuit analysis. While both deliver 3.3V at 50mA in SOT-23-5 packages, the LP2982 exhibits higher dropout voltage and lower PSRR. Substitution is acceptable only if your circuit design accommodates these performance differences. Verify input voltage headroom and noise rejection requirements before substitution.

Q: Which substitute part offers the best inventory availability?

A: LP2980IM5X-3.3/NOPB provides the highest inventory at 19789 Pcs, followed by LP2980IM5-3.3/NOPB at 16200 Pcs. Both are Active status parts with identical electrical specifications to the main part, making either suitable for immediate procurement.

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