LP3872EMP-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP3872EMP-3.3/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 3.3V output at 1.5A in a SOT-223-5 surface mount package. The device is currently in Active product status with 55,342 units in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, when packaging requirements differ (Cut Tape vs. Tape & Reel), or when design revisions require alternative part numbers within the same functional family. Several Texas Instruments linear regulators share identical electrical specifications and package footprints, enabling direct substitution under defined parameter constraints.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.55V @ 1.5A
Quiescent Current (Iq)	5 mA
Package / Case	SOT-223-5 (TO-261-5, TO-261AB)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Output voltage: 3.3V fixed
Output current capability: 1.5A minimum
Input voltage maximum: 7V
Package footprint: SOT-223-5 (TO-261-5, TO-261AB)
Mounting type: Surface Mount
Operating temperature range: -40°C to 125°C
Protection features: Over Current, Over Temperature, Short Circuit

Secondary Considerations:

Voltage dropout characteristics (0.44V to 0.55V @ 1.5A acceptable)
Quiescent current (3 mA to 9 mA acceptable)
Packaging format (Cut Tape vs. Tape & Reel)
Product status (Active or Last Time Buy)
Compliance certifications (RoHS3, REACH status)

Parts meeting all primary criteria are classified as parametric equivalents and direct substitutes. Variations in quiescent current and dropout voltage remain within acceptable operating margins for this regulator class.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout (Max)	Iq (mA)	Package	Product Status	Inventory
LP3872EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	5	SOT-223-5	Active	55,342 Pcs
LP3852EMP-3.3	Texas Instruments	3.3V	1.5A	0.44V @ 1.5A	3	SOT-223-5	Last Time Buy	1,507 Pcs
LP3852EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.44V @ 1.5A	3	SOT-223-5	Active	2,200 Pcs
LP3855EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.44V @ 1.5A	3	SOT-223-5	Active	2,396 Pcs
LP3872EMPX-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	5	SOT-223-5	Active	2,997 Pcs
LP3875EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	5	SOT-223-5	Active	1,715 Pcs
LP3962EMP-3.3	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	9	SOT-223-5	Last Time Buy	1,200 Pcs
LP3962EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	9	SOT-223-5	Active	1,695 Pcs
LP3965EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	9	SOT-223-5	Active	1,401 Pcs

Engineering Selection Recommendations

Preferred Substitutes (Active Status):

LP3852EMP-3.3/NOPB and LP3855EMP-3.3/NOPB are the primary alternatives. Both maintain Active product status, offer improved dropout voltage characteristics (0.44V vs. 0.55V), and feature lower quiescent current (3 mA vs. 5 mA). These parameters result in reduced power dissipation and improved efficiency in battery-powered or thermally constrained applications. Both are ROHS3 compliant and REACH unaffected.

LP3872EMPX-3.3/NOPB provides an exact electrical match to the primary part with identical dropout voltage and quiescent current specifications. This variant maintains Active status and is suitable for applications requiring parameter consistency with the original design.

LP3875EMP-3.3/NOPB offers identical electrical performance to LP3872EMP-3.3/NOPB with Active product status and adequate inventory availability.

Secondary Alternatives (Active Status, Higher Quiescent Current):

LP3962EMP-3.3/NOPB and LP3965EMP-3.3/NOPB are functionally equivalent but feature elevated quiescent current (9 mA vs. 5 mA). These parts are suitable for applications where standby power consumption is not a critical design constraint. Both maintain Active status and ROHS3 compliance.

End-of-Life Considerations:

LP3852EMP-3.3 and LP3962EMP-3.3 carry Last Time Buy status. These parts remain available but should not be selected for new designs requiring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-3.3/NOPB directly replace LP3872EMP-3.3/NOPB?

A: Yes. Both parts deliver 3.3V at 1.5A in SOT-223-5 packaging with identical input voltage ratings and operating temperature ranges. The LP3852EMP-3.3/NOPB features superior dropout voltage (0.44V vs. 0.55V) and lower quiescent current (3 mA vs. 5 mA), making it a direct functional substitute. No circuit modifications are required.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for manual assembly or small-volume production. Tape & Reel packaging is wound on reels for automated pick-and-place assembly. Both formats contain identical components in the same SOT-223-5 footprint. Selection depends on manufacturing process requirements, not electrical performance.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant certification. LP3852EMP-3.3 is REACH Affected; all other substitutes are REACH Unaffected. Verify REACH compliance requirements for your specific application and supply chain.

Q: Why do some parts show higher quiescent current (9 mA vs. 3 mA)?

A: Quiescent current variation reflects internal circuit design differences within the LP39xx regulator family. All variants remain within acceptable operating margins for this 1.5A output class. Higher quiescent current increases standby power consumption but does not affect load regulation or output voltage accuracy. Select based on application power budget requirements.

Q: Can I use LP3962EMP-3.3 (Last Time Buy) in a new design?

A: LP3962EMP-3.3 is functionally equivalent but carries Last Time Buy status, indicating limited future availability. For new designs requiring long-term supply assurance, select from Active status alternatives: LP3852EMP-3.3/NOPB, LP3855EMP-3.3/NOPB, LP3872EMPX-3.3/NOPB, LP3875EMP-3.3/NOPB, LP3962EMP-3.3/NOPB, or LP3965EMP-3.3/NOPB.

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

A: The "/NOPB" suffix indicates lead-free (Pb-free) RoHS compliance. Parts with this designation meet RoHS3 requirements and are suitable for applications requiring lead-free component certification. Both "/NOPB" and non-"/NOPB" variants in this list are ROHS3 compliant.

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