LP3852EMPX-5.0 Equivalent & Substitute Parts

Part Overview

The LP3852EMPX-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output at 1.5A in SOT-223-5 surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The device provides regulated power management with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable 5V power delivery with moderate current capacity.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	5V
Current - Output	1.5A
Voltage - Input (Max)	7V
Voltage Dropout (Max)	0.44V @ 1.5A
Current - Quiescent (Iq)	3 mA
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LP3852EMPX-5.0 are qualified based on the following critical parameters that must match or remain compatible:

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

The substitute parts are grouped into two categories based on dropout voltage and quiescent current characteristics:

Group 1 (Lower Dropout): LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, LP3855EMPX-5.0/NOPB

Voltage Dropout: 0.44V @ 1.5A
Quiescent Current: 3 mA

Group 2 (Higher Dropout): LP3872EMP-5.0/NOPB, LP3875EMP-5.0/NOPB

Voltage Dropout: 0.55V @ 1.5A
Quiescent Current: 5 mA

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	Package	RoHS Status
LP3852EMPX-5.0	Texas Instruments	Obsolete	5V	1.5A	0.44V @ 1.5A	3 mA	SOT-223-5	Non-compliant
LP3852EMP-5.0/NOPB	Texas Instruments	Active	5V	1.5A	0.44V @ 1.5A	3 mA	SOT-223-5	ROHS3 Compliant
LP3855EMP-5.0/NOPB	Texas Instruments	Active	5V	1.5A	0.44V @ 1.5A	3 mA	SOT-223-5	ROHS3 Compliant
LP3855EMPX-5.0/NOPB	Texas Instruments	Active	5V	1.5A	0.44V @ 1.5A	3 mA	SOT-223-5	ROHS3 Compliant
LP3872EMP-5.0/NOPB	National Semiconductor	Active	5V	1.5A	0.55V @ 1.5A	5 mA	SOT-223	Not specified
LP3875EMP-5.0/NOPB	Texas Instruments	Active	5V	1.5A	0.55V @ 1.5A	5 mA	SOT-223-5	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, and LP3855EMPX-5.0/NOPB are the preferred substitutes. These parts maintain identical electrical performance to the obsolete LP3852EMPX-5.0 with 0.44V dropout voltage and 3 mA quiescent current. All three are active products with ROHS3 compliance, providing long-term availability and regulatory alignment for new designs and production continuity.

Secondary Substitutes (Performance Trade-offs):

LP3872EMP-5.0/NOPB and LP3875EMP-5.0/NOPB are functionally compatible but exhibit higher dropout voltage (0.55V) and quiescent current (5 mA). These parts remain suitable for applications where the increased power dissipation and reduced efficiency margin are acceptable. LP3875EMP-5.0/NOPB is preferred within this group due to ROHS3 compliance and Texas Instruments sourcing.

Compliance Considerations:

All recommended active substitutes meet ROHS3 compliance requirements, addressing regulatory requirements for new production. The obsolete LP3852EMPX-5.0 is RoHS non-compliant and should be replaced in designs targeting current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-5.0/NOPB directly replace LP3852EMPX-5.0 in existing designs?

A: Yes. LP3852EMP-5.0/NOPB is electrically and mechanically identical to the obsolete LP3852EMPX-5.0, with matching output voltage (5V), current capacity (1.5A), dropout voltage (0.44V @ 1.5A), and SOT-223-5 packaging. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between Group 1 and Group 2 substitutes?

A: Group 1 substitutes (LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, LP3855EMPX-5.0/NOPB) maintain the original 0.44V dropout voltage and 3 mA quiescent current. Group 2 substitutes (LP3872EMP-5.0/NOPB, LP3875EMP-5.0/NOPB) have higher dropout voltage (0.55V) and quiescent current (5 mA), resulting in increased power dissipation. Group 1 is preferred for applications sensitive to efficiency and thermal performance.

Q: Are there packaging differences between substitute parts?

A: LP3872EMP-5.0/NOPB uses SOT-223 packaging, while all other parts use SOT-223-5. Both are surface mount packages compatible with TO-261-5 and TO-261AB footprints. Verify PCB layout compatibility before substitution.

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

A: LP3855EMP-5.0/NOPB and LP3855EMPX-5.0/NOPB are Texas Instruments active products with the highest inventory levels (3374 and 868 units respectively) and ROHS3 compliance, providing optimal long-term sourcing stability.

Q: Can LP3872EMP-5.0/NOPB be used as a substitute despite being from National Semiconductor?

A: Yes. LP3872EMP-5.0/NOPB is functionally compatible with matching output specifications and protection features. However, it exhibits higher dropout voltage (0.55V vs. 0.44V) and quiescent current (5 mA vs. 3 mA), resulting in increased power dissipation. Use only when efficiency trade-offs are acceptable for the application.

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