LP3855EMP-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP3855EMP-5.0/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed output regulation at 1.5A. This Surface Mount device operates across an input voltage range up to 7V and delivers a fixed 5V output with a maximum dropout voltage of 0.44V at full load current. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring regulated power distribution in compact form factors.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility requires alternative sourcing options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP3855EMP-5.0/NOPB
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
Package / Case	TO-261-5, TO-261AB (SOT-223-5)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LP3855EMP-5.0/NOPB is determined by the following critical parameters:

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

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications. Variations in quiescent current, dropout voltage, and supply current are noted where they differ from the primary part.

Parameter Comparison

Parameter	LP3855EMP-5.0/NOPB	LP3852EMP-5.0/NOPB	LP3855EMPX-5.0/NOPB	LP3872EMP-5.0/NOPB	LP3875EMP-5.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor	Texas Instruments
Voltage - Output (Fixed)	5V	5V	5V	5V	5V
Current - Output	1.5A	1.5A	1.5A	1.5A	1.5A
Voltage - Input (Max)	7V	7V	7V	7V	7V
Voltage Dropout (Max)	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	5 mA	5 mA
Current - Supply (Max)	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)
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
Supplier Device Package	SOT-223-5	SOT-223-5	SOT-223-5	SOT-223	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	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain Active product status, ensuring continued manufacturer support and availability. The LP3855EMP-5.0/NOPB, LP3852EMP-5.0/NOPB, LP3855EMPX-5.0/NOPB, and LP3875EMP-5.0/NOPB are ROHS3 compliant, meeting environmental and regulatory requirements for modern applications.

LP3852EMP-5.0/NOPB and LP3855EMPX-5.0/NOPB are direct parametric equivalents with identical dropout voltage (0.44V @ 1.5A) and quiescent current (3 mA), offering seamless substitution with no performance trade-offs.

LP3872EMP-5.0/NOPB and LP3875EMP-5.0/NOPB feature increased dropout voltage (0.55V @ 1.5A) and higher quiescent current (5 mA), suitable for applications where these parameter variations are acceptable. LP3872EMP-5.0/NOPB is available in Bulk packaging, while LP3875EMP-5.0/NOPB is supplied in Tape & Reel format.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-5.0/NOPB replace LP3855EMP-5.0/NOPB directly?

A: Yes. Both parts share identical electrical specifications including 5V fixed output, 1.5A current capability, 0.44V dropout voltage at full load, and SOT-223-5 package. The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel), which does not affect circuit performance.

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

A: Both parts are functionally equivalent with identical electrical parameters. The suffix variation indicates different manufacturing or distribution batches. Both are suitable for direct substitution.

Q: Can I use LP3872EMP-5.0/NOPB or LP3875EMP-5.0/NOPB as substitutes?

A: Yes, with consideration of parameter differences. These parts have higher dropout voltage (0.55V vs. 0.44V) and higher quiescent current (5 mA vs. 3 mA). They are suitable for applications where these variations do not impact system performance. Verify thermal and power budget requirements before selection.

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

A: All parts use SOT-223 package variants (SOT-223-5 or SOT-223) compatible with TO-261-5 and TO-261AB footprints. Packaging formats differ: LP3852EMP-5.0/NOPB is available in Cut Tape & Digi-Reel, LP3872EMP-5.0/NOPB in Bulk, and others in Tape & Reel. Verify packaging requirements for your procurement process.

Q: What compliance certifications apply to these parts?

A: LP3855EMP-5.0/NOPB, LP3852EMP-5.0/NOPB, LP3855EMPX-5.0/NOPB, and LP3875EMP-5.0/NOPB are ROHS3 compliant. All parts are classified under ECCN EAR99 and HTSUS 8542.39.0001 (or 8542.39.0060 for LP3852EMP-5.0/NOPB). Moisture Sensitivity Level is 1 (Unlimited) for applicable parts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message