LP2988IMM-3.3 Equivalent & Substitute Parts

Part Overview

The LP2988IMM-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 integrated protection features including over-current, over-temperature, and short-circuit protection. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. Active alternatives within the LP2986 and LP2987 series provide direct functional replacement while maintaining full electrical and mechanical compatibility.

Key Parameters

Parameter	Value
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	8-VSSOP (8-TSSOP, 8-MSOP, 0.118" / 3.00mm Width)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the LP2988IMM-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
Voltage dropout specification of 0.35V @ 200mA
Quiescent current of 120 µA
PSRR of 65dB (1kHz)
8-VSSOP package configuration
Operating temperature range of -40°C to 125°C
Identical protection features (Over Current, Over Temperature, Short Circuit)
Enable control feature

All substitute parts listed maintain these exact electrical specifications and mechanical compatibility. Substitution is valid across the LP2986 and LP2987 base product families when these parameters are matched.

Parameter Comparison

Part Number	Manufacturer	Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	PSRR	Package	RoHS Compliance	Inventory
LP2988IMM-3.3	Texas Instruments	Obsolete	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	Non-compliant	2200 Pcs
LP2986AIMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	ROHS3 Compliant	2000 Pcs
LP2986IMM-3.3/NOPB	National Semiconductor	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	Not specified	1814 Pcs
LP2987IMM-3.3/NOPB	National Semiconductor	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	Not specified	2654 Pcs
LP2987IMMX-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	ROHS3 Compliant	1189 Pcs
LP2988AIMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	ROHS3 Compliant	2220 Pcs
LP2988IMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	ROHS3 Compliant	1093 Pcs
LP2988IMMX-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	8-VSSOP	ROHS3 Compliant	4420 Pcs

Engineering Selection Recommendations

For new designs and procurement, LP2988IMMX-3.3/NOPB is the primary recommended substitute. This part maintains active product status with Texas Instruments, carries ROHS3 compliance certification, and offers the highest current inventory (4420 Pcs). The IMMX variant designation indicates extended temperature or performance qualification.

LP2988AIMM-3.3/NOPB and LP2988IMM-3.3/NOPB provide secondary options within the LP2988 base product family, both active with ROHS3 compliance. LP2986AIMM-3.3/NOPB and LP2987IMMX-3.3/NOPB are functionally equivalent alternatives from the LP2986 and LP2987 families, also carrying active status and ROHS3 compliance.

For applications requiring National Semiconductor sourcing, LP2987IMM-3.3/NOPB and LP2986IMM-3.3/NOPB maintain full electrical equivalence, though compliance certifications are not specified in available documentation.

Frequently Asked Questions (FAQ)

Q: Can LP2988IMM-3.3 be directly replaced with LP2987IMMX-3.3/NOPB?

A: Yes. Both parts deliver identical electrical performance: 3.3V fixed output, 200mA current capacity, 0.35V dropout voltage, and 65dB PSRR. The 8-VSSOP package is mechanically identical. LP2987IMMX-3.3/NOPB is active and ROHS3 compliant, making it a valid direct substitute.

Q: What is the difference between LP2988IMM-3.3/NOPB and LP2988IMMX-3.3/NOPB?

A: Both parts are electrically and mechanically identical. The IMMX designation indicates a variant qualification level. Both are active products with ROHS3 compliance. Selection between them depends on inventory availability and procurement lead times.

Q: Are LP2986 and LP2987 series parts interchangeable with LP2988?

A: Yes, within the specified 3.3V output configuration. All three base product families (LP2986, LP2987, LP2988) deliver the same electrical specifications when configured for 3.3V fixed output at 200mA. Package and protection features are identical across all listed substitutes.

Q: Does the obsolete status of LP2988IMM-3.3 affect circuit compatibility?

A: No. Obsolete status indicates end-of-life for that specific part number. All active substitutes maintain full electrical and mechanical compatibility. Designs using LP2988IMM-3.3 can transition to any active substitute without circuit modification.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates lead-free (Pb-free) packaging, consistent with ROHS3 compliance requirements. Parts with this suffix meet modern environmental and regulatory standards for electronic component manufacturing.

Q: Can I use LP2986IMM-3.3/NOPB from National Semiconductor as a substitute?

A: Yes. This part maintains full electrical equivalence across all critical parameters. However, compliance certifications are not specified in available documentation. Verify compliance requirements for your specific application before selection.

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