LP2987IMM-3.3 Equivalent & Substitute Parts

Part Overview

The LP2987IMM-3.3 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 3.3V output at 200mA with a maximum dropout voltage of 0.35V, designed for surface mount applications in the 8-VSSOP package. The main part number is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

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-VSSOP (8-TSSOP, 8-MSOP, 0.118", 3.00mm Width)
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the LP2987IMM-3.3 is determined by strict equivalence across the following critical parameters:

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-VSSOP package configuration
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 these electrical and mechanical specifications. Differences in product status, RoHS compliance, and packaging format (bulk vs. tape & reel) do not affect functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	PSRR	Package	Operating Temp	RoHS Status
LP2987IMM-3.3	Texas Instruments	Obsolete	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	Non-compliant
LP2987IMM-3.3/NOPB	National Semiconductor	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	Not specified
LP2986AIMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	ROHS3 Compliant
LP2986IMM-3.3/NOPB	National Semiconductor	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	Not specified
LP2987IMMX-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	ROHS3 Compliant
LP2988AIMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	ROHS3 Compliant
LP2988IMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	ROHS3 Compliant
LP2988IMMX-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	-40°C ~ 125°C	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the LP2987IMM-3.3. Selection should be based on the following criteria:

Product Status: Parts with Active status (LP2987IMM-3.3/NOPB, LP2986AIMM-3.3/NOPB, LP2986IMM-3.3/NOPB, LP2987IMMX-3.3/NOPB, LP2988AIMM-3.3/NOPB, LP2988IMM-3.3/NOPB, LP2988IMMX-3.3/NOPB) are preferred over the obsolete main part number for new designs and production continuity.

RoHS Compliance: For applications requiring RoHS3 compliance, select from LP2986AIMM-3.3/NOPB, LP2987IMMX-3.3/NOPB, LP2988AIMM-3.3/NOPB, LP2988IMM-3.3/NOPB, or LP2988IMMX-3.3/NOPB.

Packaging Format: Texas Instruments parts with the "X" suffix (LP2987IMMX-3.3/NOPB, LP2988IMMX-3.3/NOPB) are supplied in Tape & Reel format, suitable for automated assembly. National Semiconductor parts (LP2987IMM-3.3/NOPB, LP2986IMM-3.3/NOPB) are available in bulk or tape & reel configurations.

Inventory Availability: LP2988IMMX-3.3/NOPB offers the highest inventory level at 4,420 pieces.

Frequently Asked Questions (FAQ)

Q: Can I use LP2986AIMM-3.3/NOPB as a direct replacement for LP2987IMM-3.3?

A: Yes. Both parts share identical electrical specifications (3.3V output, 200mA current, 0.35V dropout voltage, 65dB PSRR) and the same 8-VSSOP package. The LP2986 variant is actively produced and RoHS3 compliant, making it suitable for direct substitution.

Q: What is the difference between LP2987IMMX-3.3/NOPB and LP2987IMM-3.3/NOPB?

A: Both parts are electrically identical with the same 3.3V output and 200mA rating. The primary difference is packaging format: the "X" suffix indicates Tape & Reel packaging optimized for automated assembly, while the non-X variant is available in bulk. Both are RoHS3 compliant.

Q: Are LP2988 series parts compatible with LP2987 designs?

A: Yes. LP2988AIMM-3.3/NOPB, LP2988IMM-3.3/NOPB, and LP2988IMMX-3.3/NOPB maintain all critical electrical parameters (output voltage, current rating, dropout voltage, PSRR, protection features) and use the same 8-VSSOP package. They are parametric equivalents suitable for direct substitution.

Q: Does the 8-VSSOP package differ from 8-TSSOP or 8-MSOP?

A: The 8-VSSOP, 8-TSSOP, and 8-MSOP designations refer to the same physical package with dimensions of 0.118" width and 3.00mm height. These are equivalent package formats for this product category.

Q: Which substitute part should I select for new production?

A: For new designs, select an active-status part with RoHS3 compliance. LP2988IMMX-3.3/NOPB is recommended due to its active status, RoHS3 compliance, Tape & Reel packaging for automated assembly, and high inventory availability.

Q: Are National Semiconductor parts (LP2987IMM-3.3/NOPB, LP2986IMM-3.3/NOPB) still available?

A: Yes, both National Semiconductor parts are listed as active with available inventory (2,654 and 1,814 pieces respectively). However, Texas Instruments variants are preferred for long-term supply assurance and RoHS compliance.

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