LP2987IMX-3.3 Equivalent & Substitute Parts

Part Overview

The LP2987IMX-3.3 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 3.3V output at 200mA with 8-SOIC surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part provides positive fixed output configuration with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable 3.3V regulation from input sources up to 16V.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	200mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.35V @ 200mA
Quiescent Current	120 µA
PSRR	65dB (1kHz)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the LP2987IMX-3.3 is determined by strict equivalence across the following critical parameters:

Output voltage: 3.3V fixed
Output current capability: 200mA
Maximum input voltage: 16V
Voltage dropout: 0.35V @ 200mA
Package type: 8-SOIC surface mount
Operating temperature range: -40°C ~ 125°C
Protection features: Over-current, over-temperature, short-circuit protection
Control features: Enable function

All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the original LP2987IMX-3.3, ensuring direct replacement capability in existing designs.

Parameter Comparison

Parameter	LP2987IMX-3.3	LP2987IM-3.3/NOPB	LP2986AIMX-3.3/NOPB	LP2986IMX-3.3/NOPB	LP2988AIMX-3.3/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor	National Semiconductor	National Semiconductor
Product Status	Obsolete	Active	Active	Active	Active
Output Voltage	3.3V	3.3V	3.3V	3.3V	3.3V
Output Current	200mA	200mA	200mA	200mA	200mA
Input Voltage (Max)	16V	16V	16V	16V	16V
Voltage Dropout (Max)	0.35V @ 200mA	0.35V @ 200mA	0.35V @ 200mA	0.35V @ 200mA	0.35V @ 200mA
Quiescent Current	120 µA	120 µA	120 µA	120 µA	120 µA
PSRR	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)
Package / Case	8-SOIC	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	-40°C ~ 125°C
Protection Features	OC, OT, SC	OC, OT, SC	OC, OT, SC	OC, OT, SC	OC, OT, SC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	Not specified
Inventory Status	1099 Pcs	2300 Pcs	2100 Pcs	4322 Pcs	2686 Pcs

Engineering Selection Recommendations

For designs currently using the obsolete LP2987IMX-3.3, the LP2987IM-3.3/NOPB is the primary recommended substitute. This part maintains active product status from Texas Instruments, ensuring long-term availability and technical support. It carries identical electrical and mechanical specifications with ROHS3 compliance certification.

When LP2987IM-3.3/NOPB availability is constrained, the LP2986IMX-3.3/NOPB and LP2986AIMX-3.3/NOPB from National Semiconductor provide parametric equivalence with higher inventory levels. The LP2988AIMX-3.3/NOPB offers an additional alternative with comparable specifications and active product status.

All substitute parts are surface mount 8-SOIC devices with identical pinout and electrical performance, enabling direct PCB-level replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can LP2987IM-3.3/NOPB directly replace LP2987IMX-3.3 on existing PCBs?

A: Yes. Both parts use identical 8-SOIC packaging with matching pinout, electrical specifications, and performance characteristics. No PCB redesign is required.

Q: What is the difference between LP2987IMX-3.3 and LP2987IM-3.3/NOPB?

A: The primary difference is product status. LP2987IMX-3.3 is obsolete, while LP2987IM-3.3/NOPB is active. Electrical performance and package specifications are identical. The "/NOPB" suffix indicates lead-free (Pb-free) compliance.

Q: Are National Semiconductor LP2986 and LP2988 series parts compatible with Texas Instruments LP2987?

A: Yes, for the specified 3.3V 200mA output configuration. All parts deliver identical output voltage, current capacity, dropout voltage, quiescent current, and PSRR performance. They share the same 8-SOIC package and protection features.

Q: What packaging options are available for these substitutes?

A: LP2987IM-3.3/NOPB is supplied in Tube packaging. LP2986AIMX-3.3/NOPB, LP2986IMX-3.3/NOPB, and LP2988AIMX-3.3/NOPB are supplied in Bulk packaging. All use 8-SOIC surface mount configuration.

Q: Do all substitute parts support the Enable control feature?

A: Yes. All listed substitute parts include Enable control functionality, matching the original LP2987IMX-3.3 specification.

Q: Are there temperature range limitations for these parts?

A: No. All parts operate across the identical -40°C to 125°C temperature range, suitable for industrial and commercial applications.

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