LP2987IMX-5.0 Linear Voltage Regulator: Equivalent & Substitute Parts

Part Overview

The LP2987IMX-5.0 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 5V output at 200mA with a maximum dropout voltage of 0.35V, designed for surface mount applications in the 8-SOIC package. The main part is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Voltage - Input (Max)	16V
Current - Output	200mA
Voltage Dropout (Max)	0.35V @ 200mA
Current - Quiescent (Iq)	120 µA
PSRR	65dB (1kHz)
Operating Temperature	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitution of the LP2987IMX-5.0 is determined by strict equivalence across the following critical parameters: output voltage (5V fixed), output current capability (200mA), maximum input voltage (16V), dropout voltage specification (0.35V @ 200mA), package type (8-SOIC), and protection features (Over Current, Over Temperature, Short Circuit). All identified substitute parts maintain identical electrical specifications and mechanical compatibility.

The substitute parts are grouped into two categories:

Direct Manufacturer Equivalent: LP2987IMX-5.0/NOPB maintains the exact part number designation with identical electrical and mechanical specifications, differing only in product status (Active vs. Obsolete) and packaging format (Bulk vs. standard).

Parametric Equivalents: LP2986AIMX-5.0/NOPB, LP2986IMX-5.0/NOPB, LP2987AIMX-5.0/NOPB, and LP2988IMX-5.0/NOPB share all critical electrical parameters and package specifications with the main part, enabling direct functional substitution.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Package	RoHS Status
LP2987IMX-5.0	Texas Instruments	Obsolete	5V	200mA	16V	0.35V @ 200mA	8-SOIC	RoHS non-compliant
LP2987IMX-5.0/NOPB	National Semiconductor	Active	5V	200mA	16V	0.35V @ 200mA	8-SOIC	Not specified
LP2986AIMX-5.0/NOPB	National Semiconductor	Active	5V	200mA	16V	0.35V @ 200mA	8-SOIC	Not specified
LP2986IMX-5.0/NOPB	Texas Instruments	Active	5V	200mA	16V	0.35V @ 200mA	8-SOIC	ROHS3 Compliant
LP2987AIMX-5.0/NOPB	National Semiconductor	Active	5V	200mA	16V	0.35V @ 200mA	8-SOIC	Not specified
LP2988IMX-5.0/NOPB	Texas Instruments	Active	5V	200mA	16V	0.35V @ 200mA	8-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring the LP2987IMX-5.0, selection among substitute parts should prioritize product status and compliance certifications:

Primary Selection: LP2986IMX-5.0/NOPB or LP2988IMX-5.0/NOPB are recommended as first choices. Both are manufactured by Texas Instruments, maintain Active product status, and carry ROHS3 compliance certification. These parts ensure long-term availability and regulatory alignment.

Secondary Selection: LP2987IMX-5.0/NOPB, LP2986AIMX-5.0/NOPB, and LP2987AIMX-5.0/NOPB are Active alternatives from National Semiconductor with identical electrical specifications. These parts are suitable for applications where manufacturer source flexibility is acceptable.

All substitute parts are available in quantities exceeding 2,100 units, supporting production requirements across multiple volume scenarios.

Frequently Asked Questions (FAQ)

Q: Can LP2986IMX-5.0/NOPB directly replace LP2987IMX-5.0 in existing designs?

A: Yes. Both parts share identical electrical specifications (5V output, 200mA current, 0.35V dropout voltage, 8-SOIC package) and protection features. No circuit modifications are required for functional substitution.

Q: What is the difference between LP2987IMX-5.0 and LP2987IMX-5.0/NOPB?

A: The /NOPB designation indicates "No Plumbum" (lead-free) packaging. Both parts are electrically identical; the primary difference is product status (Obsolete vs. Active) and packaging format (standard vs. Bulk).

Q: Are all substitute parts compatible with the 8-SOIC footprint?

A: Yes. All substitute parts use the 8-SOIC package with 0.154" width (3.90mm), ensuring mechanical and electrical compatibility with existing PCB layouts.

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

A: LP2986IMX-5.0/NOPB and LP2988IMX-5.0/NOPB from Texas Instruments are recommended for long-term designs. Both carry Active product status and ROHS3 compliance, supporting sustained procurement.

Q: Do all substitute parts meet RoHS requirements?

A: LP2986IMX-5.0/NOPB and LP2988IMX-5.0/NOPB are ROHS3 compliant. Other substitutes do not specify RoHS status in available documentation. For RoHS-mandated applications, select Texas Instruments variants.

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