LP2988AIMX-3.3 Equivalent & Substitute Parts

Part Overview

The LP2988AIMX-3.3 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive 3.3V output at 200mA with a maximum dropout voltage of 0.35V at full load current. The part is currently marked as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity. Equivalent alternatives maintain identical electrical performance and mechanical compatibility while offering active product status from alternative manufacturers.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	200mA
Maximum Input Voltage	16V
Dropout Voltage (Max)	0.35V @ 200mA
Quiescent Current	120 µA
PSRR	65dB (1kHz)
Package	8-SOIC (0.154", 3.90mm Width)
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP2988AIMX-3.3 are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Fixed output voltage of 3.3V
Output current rating of 200mA
Maximum input voltage of 16V
Dropout voltage of 0.35V @ 200mA
Quiescent current of 120 µA
PSRR of 65dB (1kHz)
8-SOIC package with 0.154" (3.90mm) width
Operating temperature range of -40°C ~ 125°C
Identical protection features: Over Current, Over Temperature, Short Circuit
Enable control feature

All substitute parts listed maintain 100% parameter compatibility across these critical specifications, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Parameter	LP2988AIMX-3.3	LP2986AIMX-3.3/NOPB	LP2986IMX-3.3/NOPB	LP2988AIMX-3.3/NOPB
Manufacturer	Texas Instruments	National Semiconductor	National Semiconductor	National Semiconductor
Product Status	Obsolete	Active	Active	Active
Output Voltage	3.3V	3.3V	3.3V	3.3V
Output Current	200mA	200mA	200mA	200mA
Maximum Input Voltage	16V	16V	16V	16V
Dropout Voltage (Max)	0.35V @ 200mA	0.35V @ 200mA	0.35V @ 200mA	0.35V @ 200mA
Quiescent Current	120 µA	120 µA	120 µA	120 µA
PSRR	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)
Package	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
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

Engineering Selection Recommendations

All three substitute parts (LP2986AIMX-3.3/NOPB, LP2986IMX-3.3/NOPB, and LP2988AIMX-3.3/NOPB) are direct functional equivalents to the obsolete LP2988AIMX-3.3. The primary distinction among substitutes is product status: all three alternatives carry active product status from National Semiconductor, ensuring ongoing availability and manufacturing support.

Selection between the three substitute options should be based on inventory availability and supply chain considerations. The LP2986IMX-3.3/NOPB currently maintains the highest inventory level at 4,322 pieces, followed by LP2988AIMX-3.3/NOPB at 2,686 pieces, and LP2986AIMX-3.3/NOPB at 2,100 pieces. All parts meet identical electrical specifications and package requirements, making them interchangeable at the circuit board level.

Frequently Asked Questions (FAQ)

Q: Can LP2986AIMX-3.3/NOPB directly replace LP2988AIMX-3.3?

A: Yes. Both parts deliver identical electrical performance: 3.3V fixed output, 200mA current capacity, 0.35V dropout voltage at full load, and 65dB PSRR. The 8-SOIC package dimensions are identical, enabling direct PCB substitution without layout modifications.

Q: What is the difference between LP2986AIMX-3.3/NOPB and LP2986IMX-3.3/NOPB?

A: Both parts are parametrically equivalent with identical electrical specifications and package configuration. The difference lies in part number designation and inventory availability. Selection can be based on supply chain preference and stock levels.

Q: Are all substitute parts in active production?

A: Yes. All three substitute parts (LP2986AIMX-3.3/NOPB, LP2986IMX-3.3/NOPB, and LP2988AIMX-3.3/NOPB) carry active product status from National Semiconductor, ensuring continued manufacturing support and availability.

Q: Does the 8-SOIC package remain the same across all parts?

A: Yes. All parts use the 8-SOIC package with 0.154" (3.90mm) width specification, maintaining identical footprint and pin configuration for direct board-level compatibility.

Q: Are there any compliance or certification differences?

A: All parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Compliance status is consistent across the main part and all substitutes.

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