LP2983AIM5X-1.2 Equivalent & Substitute Parts

Part Overview

The LP2983AIM5X-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.2V output applications with 150mA current capacity in SOT-23-5 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The device provides integrated protection features including over-current, over-temperature, and short-circuit protection, with an enable control feature for power management flexibility.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.2V
Voltage - Input (Max)	16V
Current - Output	150mA
Current - Quiescent (Iq)	95 µA
PSRR	65dB (1kHz)
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the LP2983AIM5X-1.2 is determined by strict equivalence across the following critical parameters:

Output voltage: 1.2V fixed
Maximum output current: 150mA
Maximum input voltage: 16V
Quiescent current: 95 µA
PSRR: 65dB (1kHz)
Protection features: Over Current, Over Temperature, Short Circuit
Control features: Enable function
Operating temperature range: -40°C ~ 125°C
Package type: SOT-23-5 (SC-74A, SOT-753)
Mounting type: Surface Mount

Parts meeting all these parameters are classified as direct equivalents. Variations in packaging format (Tape & Reel, Cut Tape, Bulk) and product status do not affect electrical compatibility.

Parameter Comparison

Parameter	LP2983AIM5X-1.2	LP2983AIM5X-1.2/NOPB	LP2983IM5-1.2/NOPB	LP2983IM5X-1.2/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Output Voltage (Fixed)	1.2V	1.2V	1.2V	1.2V
Output Current	150mA	150mA	150mA	150mA
Input Voltage (Max)	16V	16V	16V	16V
Quiescent Current	95 µA	95 µA	95 µA	95 µA
PSRR	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Product Status	Obsolete	Last Time Buy	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Packaging Format	Not specified	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Bulk

Engineering Selection Recommendations

All four parts listed meet the electrical and mechanical substitution criteria for the LP2983AIM5X-1.2. Selection should be based on product status and compliance requirements:

LP2983AIM5X-1.2/NOPB is classified as Last Time Buy, indicating limited future availability. This part carries ROHS3 compliance, making it suitable for applications requiring RoHS certification. Tape & Reel packaging is standard for production environments.

LP2983IM5-1.2/NOPB is classified as Obsolete with ROHS3 compliance. Cut Tape and Digi-Reel packaging formats support both production and maintenance applications.

LP2983IM5X-1.2/NOPB is classified as Active, indicating ongoing availability and production support. This part is sourced from National Semiconductor and is available in Bulk packaging. Active status provides the longest supply chain reliability for new designs and ongoing production.

For new designs, LP2983IM5X-1.2/NOPB is the preferred selection due to active product status. For legacy system maintenance, any of the three alternatives meet electrical requirements.

Frequently Asked Questions (FAQ)

Q: Can LP2983IM5X-1.2/NOPB replace LP2983AIM5X-1.2 in existing designs?

A: Yes. Both parts are electrically identical across all critical parameters: 1.2V fixed output, 150mA current capacity, 16V maximum input, 95 µA quiescent current, and identical protection features. SOT-23-5 package compatibility is confirmed. Substitution is direct.

Q: What is the difference between the packaging formats listed?

A: Tape & Reel (TR) is standard for automated production assembly. Cut Tape (CT) and Digi-Reel® support both production and manual assembly. Bulk packaging is used for component inventory and distribution. All formats contain electrically identical parts; packaging format selection depends on assembly process requirements.

Q: Why is RoHS compliance status different across these parts?

A: RoHS compliance reflects manufacturing date and process. LP2983AIM5X-1.2 predates RoHS3 requirements (non-compliant). LP2983AIM5X-1.2/NOPB and LP2983IM5-1.2/NOPB are manufactured to ROHS3 standards. For applications requiring RoHS certification, select ROHS3 compliant variants.

Q: Does product status affect electrical performance?

A: No. Product status (Obsolete, Last Time Buy, Active) indicates supply chain availability and manufacturing support, not electrical performance. All listed parts deliver identical electrical characteristics. Status affects long-term sourcing strategy, not circuit functionality.

Q: Are there any pin configuration differences between these parts?

A: No. All parts use SOT-23-5 package with identical pin configuration. Direct PCB layout compatibility is confirmed across all substitutes.

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