LP2988IMMX-3.3 Equivalent & Substitute Parts

Part Overview

The LP2988IMMX-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications with 200mA current capacity in an 8-VSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Active alternatives with identical electrical and mechanical specifications are available from the LP2986, LP2987, and LP2988 product families.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	200mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.35V @ 200mA
Quiescent Current (Iq)	120 µA
PSRR	65dB (1kHz)
Operating Temperature Range	-40°C ~ 125°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the LP2988IMMX-3.3 is determined by strict equivalence across the following electrical and mechanical parameters:

Output voltage fixed at 3.3V
Output current capacity of 200mA
Maximum input voltage of 16V
Voltage dropout of 0.35V @ 200mA
Quiescent current of 120 µA
PSRR of 65dB (1kHz)
Operating temperature range of -40°C ~ 125°C
8-VSSOP package configuration
Surface mount mounting type
Identical protection features (Over Current, Over Temperature, Short Circuit)
Enable control feature

All substitute parts listed maintain these exact specifications. Substitution is further qualified by product status (active vs. obsolete) and RoHS compliance certification.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Iq	PSRR	Operating Temp	Package	RoHS Status	Inventory
LP2988IMMX-3.3	Texas Instruments	Obsolete	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	RoHS non-compliant	14658 Pcs
LP2988IMMX-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	ROHS3 Compliant	4420 Pcs
LP2986AIMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	ROHS3 Compliant	2000 Pcs
LP2986IMM-3.3/NOPB	National Semiconductor	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	Not specified	1814 Pcs
LP2987IMM-3.3/NOPB	National Semiconductor	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	Not specified	2654 Pcs
LP2987IMMX-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	ROHS3 Compliant	1189 Pcs
LP2988AIMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	ROHS3 Compliant	2220 Pcs
LP2988IMM-3.3/NOPB	Texas Instruments	Active	3.3V	200mA	16V	0.35V @ 200mA	120 µA	65dB (1kHz)	-40°C ~ 125°C	8-VSSOP	ROHS3 Compliant	1093 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical equivalence to the LP2988IMMX-3.3. Selection should prioritize active product status parts with ROHS3 compliance certification for new designs and long-term availability assurance.

Texas Instruments manufactured parts (LP2988IMMX-3.3/NOPB, LP2986AIMM-3.3/NOPB, LP2987IMMX-3.3/NOPB, LP2988AIMM-3.3/NOPB, LP2988IMM-3.3/NOPB) carry ROHS3 compliance and active product status. National Semiconductor parts (LP2986IMM-3.3/NOPB, LP2987IMM-3.3/NOPB) are active but lack specified RoHS certification in the provided data.

Packaging format differs between Tape & Reel (TR) and Bulk configurations. Tape & Reel packaging is standard for automated assembly processes. Bulk packaging may require manual handling and tape application.

Frequently Asked Questions (FAQ)

Q: Can LP2988IMMX-3.3 be directly replaced with LP2988IMMX-3.3/NOPB?

A: Yes. Both parts are electrically and mechanically identical. The primary difference is product status (obsolete vs. active) and RoHS compliance (non-compliant vs. ROHS3 compliant). The /NOPB suffix indicates lead-free, halogen-free manufacturing.

Q: What is the difference between LP2988 and LP2986 or LP2987 variants?

A: All three product families (LP2986, LP2987, LP2988) maintain identical electrical specifications for the 3.3V 200mA configuration. Differences exist in the base product line designation only. All are functionally equivalent for this output voltage and current rating.

Q: Are there packaging differences between substitute parts?

A: Packaging format varies between Tape & Reel (TR) and Bulk. All parts use the same 8-VSSOP case with 0.118" width (3.00mm). Tape & Reel is suitable for automated pick-and-place assembly; Bulk packaging requires manual tape application.

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

A: Texas Instruments parts with active product status and ROHS3 compliance offer the strongest long-term availability profile. LP2988IMMX-3.3/NOPB, LP2988AIMM-3.3/NOPB, and LP2988IMM-3.3/NOPB are recommended for new designs.

Q: Is the obsolete LP2988IMMX-3.3 still functionally equivalent to active alternatives?

A: Yes. Obsolete status indicates end-of-life manufacturing, not functional degradation. The part remains electrically and mechanically equivalent to all listed substitutes. However, procurement from active alternatives is recommended for design continuity.

Q: Do all substitute parts support the same control and protection features?

A: Yes. All parts include Enable control feature and identical protection features: Over Current, Over Temperature, and Short Circuit protection.

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