LP2983AIM5-1.2 Equivalent & Substitute Parts

Part Overview

The LP2983AIM5-1.2 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)
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
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 LP2983AIM5-1.2 is determined by strict electrical and mechanical parameter matching. The following criteria define valid equivalents:

Output voltage: Fixed 1.2V
Output current capacity: 150mA minimum
Input voltage rating: 16V maximum
Package type: SOT-23-5 (SC-74A, SOT-753)
Protection features: Over-current, over-temperature, short-circuit protection
Control features: Enable function
Quiescent current: 95 µA
PSRR: 65dB (1kHz)
Operating temperature range: -40°C to 125°C

All substitute parts listed maintain these electrical specifications and physical packaging requirements, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Parameter	LP2983AIM5-1.2	LP2983AIM5X-1.2/NOPB	LP2983IM5-1.2/NOPB	LP2983IM5X-1.2/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Output Configuration	Positive	Positive	Positive	Positive
Output Type	Fixed	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	1.2V	1.2V	1.2V	1.2V
Voltage - Input (Max)	16V	16V	16V	16V
Current - Output	150mA	150mA	150mA	150mA
Current - Quiescent (Iq)	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
Control Features	Enable	Enable	Enable	Enable
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

For new designs and ongoing production requiring LP2983AIM5-1.2 functionality, LP2983IM5X-1.2/NOPB is the primary selection. This part maintains full electrical and mechanical equivalence while offering active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

LP2983AIM5X-1.2/NOPB serves as a secondary option with Last Time Buy status and ROHS3 compliance, suitable for applications where Tape & Reel packaging is preferred. This variant provides the same electrical performance with improved compliance posture compared to the original part.

LP2983IM5-1.2/NOPB is available in Cut Tape and Digi-Reel packaging with ROHS3 compliance, though marked as obsolete. This option remains viable for applications requiring specific packaging formats.

All three substitute parts provide identical electrical performance and protection characteristics. Selection should prioritize product status and compliance requirements for the intended application timeline.

Frequently Asked Questions (FAQ)

Q: Can LP2983IM5X-1.2/NOPB directly replace LP2983AIM5-1.2 in existing circuits?

A: Yes. Both parts share identical electrical specifications including 1.2V fixed output, 150mA current capacity, 16V maximum input voltage, and SOT-23-5 packaging. Pin configuration and functional behavior are equivalent, enabling direct substitution without circuit modification.

Q: What is the difference between the packaging variants?

A: LP2983AIM5-1.2 and LP2983AIM5X-1.2/NOPB are supplied in standard packaging. LP2983IM5-1.2/NOPB is available in Cut Tape and Digi-Reel format. LP2983IM5X-1.2/NOPB is supplied in Bulk. All variants use identical SOT-23-5 physical packaging suitable for surface mount assembly.

Q: Why is RoHS compliance important for this selection?

A: ROHS3 compliance indicates adherence to current environmental and hazardous substance restrictions. LP2983AIM5X-1.2/NOPB and LP2983IM5-1.2/NOPB meet ROHS3 standards, making them suitable for applications subject to regulatory compliance requirements. The original LP2983AIM5-1.2 is RoHS non-compliant.

Q: Which substitute part has the best long-term availability?

A: LP2983IM5X-1.2/NOPB carries Active product status, indicating ongoing manufacturing and distribution. This part is the recommended choice for new designs requiring extended component availability.

Q: Are all substitute parts rated for the same operating temperature range?

A: Yes. All listed parts operate across -40°C to 125°C, maintaining identical thermal performance specifications.

Q: Can these parts be used interchangeably in high-reliability applications?

A: All substitute parts maintain identical electrical specifications and protection features. Selection should consider product status and compliance certifications relevant to the application's reliability requirements and regulatory environment.

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