LP3874EMP-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3874EMP-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 800mA output current in a compact SOT-223-5 package and is classified as Obsolete. Due to its obsolete status, identifying active equivalent and substitute parts is essential for ongoing design support, production continuity, and component procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	7V
Voltage - Output (Min/Fixed)	1.2V
Voltage - Output (Max)	6.6V
Current - Output	800mA
Voltage Dropout (Max)	0.35V @ 800mA
Package / Case	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C

Substitute Part Grouping Explanation

Substitute parts for the LP3874EMP-ADJ are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters (Must Match):

Output Configuration: Positive
Output Type: Adjustable
Number of Regulators: 1
Voltage - Input (Max): 7V
Voltage - Output (Min/Fixed): 1.2V
Voltage - Output (Max): 6.6V
Current - Output: 800mA
Voltage Dropout (Max): 0.35V @ 800mA

Mechanical Parameters (Must Match):

Package / Case: TO-261-5, TO-261AB
Supplier Device Package: SOT-223-5
Mounting Type: Surface Mount

Functional Parameters (Must Match):

Control Features: Enable
Protection Features: Over Current, Over Temperature, Short Circuit
Operating Temperature: -40°C ~ 125°C

The identified substitute parts maintain identical electrical and mechanical specifications, ensuring direct functional compatibility in existing circuit designs.

Parameter Comparison

Parameter	LP3874EMP-ADJ	LP3874EMP-ADJ/NOPB	LP3874EMPX-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Voltage - Input (Max)	7V	7V	7V
Voltage - Output (Min/Fixed)	1.2V	1.2V	1.2V
Voltage - Output (Max)	6.6V	6.6V	6.6V
Current - Output	800mA	800mA	800mA
Voltage Dropout (Max)	0.35V @ 800mA	0.35V @ 800mA	0.35V @ 800mA
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-261-5, TO-261AB	TO-261-5, TO-261AB	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5	SOT-223-5	SOT-223-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both LP3874EMP-ADJ/NOPB and LP3874EMPX-ADJ/NOPB are parametric equivalents suitable for replacing the obsolete LP3874EMP-ADJ in active designs. Key selection factors based on provided specifications:

Product Status: The substitute parts LP3874EMP-ADJ/NOPB and LP3874EMPX-ADJ/NOPB are classified as Active, ensuring long-term availability and production support compared to the Obsolete main part.

Compliance: Both substitute parts are ROHS3 Compliant, whereas the original LP3874EMP-ADJ is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements for electronic component manufacturing and distribution.

Packaging: Both substitutes are available in Tape & Reel (TR) packaging with Cut Tape (CT) and Digi-Reel® options, supporting both prototype and production-volume procurement workflows.

Electrical Equivalence: All three parts maintain identical electrical specifications across input voltage, output voltage range, output current, dropout voltage, PSRR, and protection features, ensuring direct functional replacement without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can LP3874EMP-ADJ/NOPB and LP3874EMPX-ADJ/NOPB be used interchangeably with LP3874EMP-ADJ?

A: Yes. Both substitute parts are parametric equivalents with identical electrical and mechanical specifications. They deliver the same 800mA output current, adjustable voltage range (1.2V to 6.6V), and protection features in the same SOT-223-5 package.

Q: What is the difference between LP3874EMP-ADJ/NOPB and LP3874EMPX-ADJ/NOPB?

A: Both parts share identical electrical and mechanical specifications. The difference lies in packaging options and availability. Both are Active products with ROHS3 compliance and are available in Tape & Reel format.

Q: Why is the original LP3874EMP-ADJ marked as Obsolete?

A: The Obsolete status indicates that Texas Instruments has discontinued production of this specific part number. The substitute parts LP3874EMP-ADJ/NOPB and LP3874EMPX-ADJ/NOPB are Active alternatives that provide equivalent functionality with improved compliance status.

Q: Are there any compliance differences between the main part and substitutes?

A: Yes. The original LP3874EMP-ADJ is RoHS non-compliant, while both substitute parts (LP3874EMP-ADJ/NOPB and LP3874EMPX-ADJ/NOPB) are ROHS3 Compliant. This compliance improvement is significant for new designs and regulatory adherence.

Q: Can these parts be used in both prototype and production environments?

A: Yes. Both substitute parts are available in Cut Tape (CT) and Digi-Reel® packaging for prototyping, as well as Tape & Reel (TR) format for production-volume applications.

Q: What is the moisture sensitivity level for these parts?

A: All three parts (main and substitutes) have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message