LP3855ES-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP3855ES-5.0/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 5V output at 1.5A maximum current with a maximum dropout voltage of 0.38V at full load. The device features integrated protection against overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications. This part is actively manufactured and widely used in embedded systems, industrial equipment, and consumer electronics requiring stable 5V regulation from input sources up to 7V.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or end-of-life considerations for the primary component.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP3855ES-5.0/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	1.5A
Voltage Dropout (Max)	0.38V @ 1.5A
Input Voltage (Max)	7V
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LP3855ES-5.0/NOPB are identified based on the following critical parameters that determine functional interchangeability:

Fixed output voltage of 5V
Output current rating of 1.5A
Maximum input voltage of 7V
TO-263 (DDPAK-5) surface mount package
Operating temperature range of -40°C to 125°C
Integrated protection features (overcurrent, overtemperature, short circuit)
Enable control feature
ROHS3 compliance and active product status

The LP3852ES-5.0/NOPB and LP3872ES-5.0/NOPB meet these core substitution criteria. Both devices share identical output specifications, package configuration, and compliance certifications with the primary part. Differences in quiescent current and dropout voltage characteristics are secondary parameters that do not prevent functional substitution in applications where the LP3855ES-5.0/NOPB is specified.

Parameter Comparison

Parameter	LP3855ES-5.0/NOPB	LP3852ES-5.0/NOPB	LP3872ES-5.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	5V	5V	5V
Output Current	1.5A	1.5A	1.5A
Voltage Dropout (Max)	0.38V @ 1.5A	0.38V @ 1.5A	0.55V @ 1.5A
Current - Quiescent (Iq)	3 mA	3 mA	5 mA
Current - Supply (Max)	10 mA	10 mA	15 mA
Input Voltage (Max)	7V	7V	7V
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—LP3855ES-5.0/NOPB, LP3852ES-5.0/NOPB, and LP3872ES-5.0/NOPB—are actively manufactured by Texas Instruments and carry ROHS3 compliance certification. They are suitable for direct substitution in applications requiring a 5V, 1.5A linear regulator in TO-263 surface mount packaging.

The LP3852ES-5.0/NOPB is functionally identical to the LP3855ES-5.0/NOPB across all specified parameters and represents the closest equivalent.

The LP3872ES-5.0/NOPB differs in quiescent current (5 mA versus 3 mA) and dropout voltage (0.55V versus 0.38V at 1.5A). These differences are acceptable for applications where the primary part is unavailable, provided the circuit design accommodates the higher dropout voltage and increased quiescent current draw.

Selection between these parts should be based on availability, inventory status, and application-specific requirements regarding power efficiency and thermal performance.

Frequently Asked Questions (FAQ)

Q: Can LP3852ES-5.0/NOPB be used as a direct replacement for LP3855ES-5.0/NOPB?

A: Yes. The LP3852ES-5.0/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current rating, package configuration, and protection features. No circuit modifications are required.

Q: What is the difference between LP3872ES-5.0/NOPB and LP3855ES-5.0/NOPB?

A: The LP3872ES-5.0/NOPB has a higher dropout voltage (0.55V versus 0.38V at 1.5A) and higher quiescent current (5 mA versus 3 mA). Both devices deliver the same 5V output at 1.5A and use the same TO-263 package. The LP3872ES-5.0/NOPB is suitable for substitution when the primary part is unavailable, though applications sensitive to dropout voltage or power consumption should evaluate the impact of these parameter differences.

Q: Are all three parts in the same package?

A: Yes. LP3855ES-5.0/NOPB, LP3852ES-5.0/NOPB, and LP3872ES-5.0/NOPB all use the TO-263-6 (D2PAK with 5 Leads + Tab) surface mount package. They are pin-compatible and require no PCB layout modifications.

Q: Do these parts have the same protection features?

A: Yes. All three parts include integrated overcurrent, overtemperature, and short circuit protection, with enable control functionality.

Q: Are these parts RoHS compliant?

A: Yes. LP3855ES-5.0/NOPB, LP3852ES-5.0/NOPB, and LP3872ES-5.0/NOPB are all ROHS3 compliant.

Q: What is the operating temperature range for these regulators?

A: All three parts operate across -40°C to 125°C, suitable for industrial and extended temperature applications.

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