LP3872EMP-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP3872EMP-5.0/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 1.5A at 5V with a maximum dropout voltage of 0.55V, housed in a SOT-223-5 surface mount package. The device is Active status and ROHS3 compliant, making it suitable for applications requiring regulated 5V power distribution in compact form factors. Substitute parts are identified when equivalent electrical performance, package compatibility, and regulatory compliance align with the original specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP3872EMP-5.0/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	1.5A
Maximum Input Voltage	7V
Dropout Voltage (Max)	0.55V @ 1.5A
Quiescent Current	5 mA
Package / Case	SOT-223-5
Operating Temperature Range	-40°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3872EMP-5.0/NOPB are determined by strict equivalence across the following critical parameters:

Output voltage fixed at 5V
Output current capability of 1.5A
Maximum input voltage of 7V
SOT-223-5 package compatibility
Surface mount mounting type
Operating temperature range -40°C ~ 125°C
Enable control feature
Over current, over temperature, and short circuit protection
Active product status
ROHS3 compliance

The LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, LP3855EMPX-5.0/NOPB, and LP3875EMP-5.0/NOPB meet these core electrical and mechanical requirements and are classified as parametric equivalents.

Parameter Comparison

Parameter	LP3872EMP-5.0/NOPB	LP3852EMP-5.0/NOPB	LP3855EMP-5.0/NOPB	LP3855EMPX-5.0/NOPB	LP3875EMP-5.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	5V	5V	5V	5V	5V
Output Current	1.5A	1.5A	1.5A	1.5A	1.5A
Maximum Input Voltage	7V	7V	7V	7V	7V
Dropout Voltage (Max)	0.55V @ 1.5A	0.44V @ 1.5A	0.44V @ 1.5A	0.44V @ 1.5A	0.55V @ 1.5A
Quiescent Current	5 mA	3 mA	3 mA	3 mA	5 mA
Supply Current (Max)	15 mA	10 mA	10 mA	10 mA	15 mA
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)
Package / Case	SOT-223-5	SOT-223-5	SOT-223-5	SOT-223-5	SOT-223-5
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All substitute parts listed maintain Active product status with ROHS3 compliance and REACH unaffected designation, ensuring regulatory alignment with the original LP3872EMP-5.0/NOPB. Selection between equivalents depends on specific application requirements:

The LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, and LP3855EMPX-5.0/NOPB offer improved efficiency characteristics with lower dropout voltage (0.44V versus 0.55V) and reduced quiescent current (3 mA versus 5 mA), resulting in lower power dissipation in applications operating near the 7V maximum input limit.

The LP3875EMP-5.0/NOPB maintains identical electrical performance to the LP3872EMP-5.0/NOPB with matching dropout voltage and quiescent current specifications.

All parts share identical PSRR performance, protection features (over current, over temperature, short circuit), and enable control functionality. Package compatibility across all variants is confirmed at SOT-223-5.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-5.0/NOPB replace LP3872EMP-5.0/NOPB in existing designs?

A: Yes. Both parts deliver 1.5A at 5V output with identical package, operating temperature range, and protection features. The LP3852EMP-5.0/NOPB provides superior dropout voltage and quiescent current performance, making it a direct functional substitute.

Q: What is the difference between LP3855EMP-5.0/NOPB and LP3855EMPX-5.0/NOPB?

A: Both parts are electrically identical with matching 0.44V dropout voltage and 3 mA quiescent current. The primary distinction is packaging format: LP3855EMP-5.0/NOPB is supplied in Tape & Reel (TR), while LP3855EMPX-5.0/NOPB is also supplied in Tape & Reel (TR). Verify packaging requirements with your procurement specification.

Q: Are all substitute parts compatible with the SOT-223-5 footprint?

A: Yes. All listed substitute parts use the SOT-223-5 package with TO-261-5 and TO-261AB case designations, ensuring direct PCB footprint compatibility.

Q: Which substitute offers the lowest power consumption?

A: The LP3852EMP-5.0/NOPB, LP3855EMP-5.0/NOPB, and LP3855EMPX-5.0/NOPB each provide 3 mA quiescent current and 10 mA maximum supply current, compared to 5 mA and 15 mA respectively for the LP3872EMP-5.0/NOPB and LP3875EMP-5.0/NOPB.

Q: Do all parts meet the same regulatory requirements?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS classifications, confirming regulatory equivalence.

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