LP3852EMP-5.0 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP3852EMP-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 1.5A current capacity in SOT-223-5 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The device provides regulated 5V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for embedded systems and power management circuits requiring stable 5V rails.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the LP3852EMP-5.0 are qualified based on the following critical parameters that must remain constant across all equivalent devices:

Output voltage: 5V fixed
Maximum output current: 1.5A
Maximum input voltage: 7V
Package type: SOT-223-5 (TO-261-5, TO-261AB)
Surface mount configuration
Operating temperature range: -40°C to 125°C
Protection features: Over-current, over-temperature, short-circuit protection
Enable control feature

Substitute parts are grouped into two categories: direct manufacturer equivalents (same base part number with packaging variants) and parametric equivalents (different base part numbers meeting identical electrical specifications).

Parameter Comparison

Parameter	LP3852EMP-5.0	LP3852EMP-5.0/NOPB	LP3855EMP-5.0/NOPB	LP3855EMPX-5.0/NOPB	LP3872EMP-5.0/NOPB	LP3875EMP-5.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active
Output Voltage (Fixed)	5V	5V	5V	5V	5V	5V
Current - Output	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A
Voltage - Input (Max)	7V	7V	7V	7V	7V	7V
Voltage Dropout (Max)	0.44V @ 1.5A	0.44V @ 1.5A	0.44V @ 1.5A	0.44V @ 1.5A	0.55V @ 1.5A	0.55V @ 1.5A
Current - Quiescent (Iq)	3 mA	3 mA	3 mA	3 mA	5 mA	5 mA
Current - Supply (Max)	10 mA	10 mA	10 mA	10 mA	15 mA	15 mA
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-261-5, TO-261AB	TO-261-5, TO-261AB	TO-261-5, TO-261AB	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	SOT-223-5	SOT-223	SOT-223-5
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: LP3852EMP-5.0/NOPB

This is the direct equivalent of the obsolete LP3852EMP-5.0, maintaining identical electrical specifications and performance characteristics. The /NOPB suffix indicates lead-free, RoHS3 compliant construction. This part is currently active in production and available in higher inventory quantities (1,781 pcs). Selection of this part eliminates any performance variation while providing modern compliance certifications.

Secondary Recommendations: LP3855EMP-5.0/NOPB and LP3855EMPX-5.0/NOPB

These Texas Instruments parts are parametric equivalents with identical electrical performance to the LP3852EMP-5.0. Both maintain the same 0.44V dropout voltage and 3 mA quiescent current specifications. LP3855EMP-5.0/NOPB offers the highest inventory availability (3,374 pcs) among all substitutes. LP3855EMPX-5.0/NOPB provides an alternative variant with comparable specifications (868 pcs available). Both are ROHS3 compliant and active products.

Alternative Options: LP3872EMP-5.0/NOPB and LP3875EMP-5.0/NOPB

These parts meet all core electrical requirements but exhibit slightly degraded performance characteristics. LP3872EMP-5.0/NOPB (National Semiconductor) and LP3875EMP-5.0/NOPB (Texas Instruments) both feature 0.55V dropout voltage and 5 mA quiescent current, representing 0.11V higher dropout and 2 mA higher quiescent current compared to the primary options. These parts are suitable for applications where the increased dropout voltage and quiescent current do not impact system performance. LP3875EMP-5.0/NOPB is ROHS3 compliant with 2,186 pcs inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use LP3855EMP-5.0/NOPB as a direct replacement for LP3852EMP-5.0?

A: Yes. Both parts deliver identical electrical performance with 5V fixed output, 1.5A maximum current, 0.44V dropout voltage at 1.5A, and 3 mA quiescent current. The SOT-223-5 package pinout is compatible. The primary difference is product status: LP3852EMP-5.0 is obsolete while LP3855EMP-5.0/NOPB is active production with RoHS3 compliance.

Q: What is the difference between LP3852EMP-5.0/NOPB and LP3855EMP-5.0/NOPB?

A: These are distinct part numbers from Texas Instruments with identical electrical specifications. LP3852EMP-5.0/NOPB is the direct equivalent of the obsolete LP3852EMP-5.0. LP3855EMP-5.0/NOPB is a parametric equivalent with the same performance. Both are suitable for replacement applications; selection depends on availability and supply chain preferences.

Q: Why do LP3872EMP-5.0/NOPB and LP3875EMP-5.0/NOPB have higher dropout voltages?

A: LP3872EMP-5.0/NOPB and LP3875EMP-5.0/NOPB are designed with different internal architectures resulting in 0.55V dropout voltage versus 0.44V for the primary options. This 0.11V difference may impact applications operating near the maximum input voltage specification. These parts remain functionally compatible for most 5V regulation applications but should be evaluated for specific thermal and efficiency requirements.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use SOT-223 surface mount packaging with TO-261-5 or TO-261AB case designations. LP3872EMP-5.0/NOPB is specified as SOT-223 (without the -5 suffix) but maintains mechanical and electrical compatibility with SOT-223-5 devices. PCB layout and footprints designed for the original LP3852EMP-5.0 are compatible with all listed substitutes.

Q: What compliance certifications should I verify for new designs?

A: For new production designs, specify parts with ROHS3 compliance certification. LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, LP3855EMPX-5.0/NOPB, and LP3875EMP-5.0/NOPB all carry ROHS3 certification. The original LP3852EMP-5.0 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can I mix different substitute parts in the same production batch?

A: Yes, all listed substitutes are electrically and mechanically compatible. However, mixing parts with different dropout voltages (0.44V versus 0.55V) may introduce minor performance variations in thermal behavior and efficiency. For consistency, maintain single-part selection within production batches unless application requirements explicitly permit performance variation.

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