LP3875ESX-5.0 Equivalent & Substitute Parts

Part Overview

The LP3875ESX-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes 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 applications requiring stable low-dropout regulation.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed 5V
Number of Regulators	1
Voltage - Input (Max)	7V
Current - Output	1.5A
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LP3875ESX-5.0 is determined by the following critical parameters:

Output voltage: Fixed 5V
Output current capability: 1.5A minimum
Package type: TO-263 (DDPAK-5) surface mount
Input voltage rating: 7V maximum
Operating temperature range: -40°C ~ 125°C
Protection features: Over-current, over-temperature, and short-circuit protection
Regulatory compliance: ROHS3 compliant

The substitute parts listed below meet all these core electrical and mechanical requirements, enabling direct replacement in circuit designs. Variations in dropout voltage, quiescent current, and supply current do not affect substitutability within the specified parameter envelope.

Parameter Comparison

Parameter	LP3875ESX-5.0	LP3852ESX-5.0/NOPB	LP3855ESX-5.0/NOPB	LP3872ESX-5.0/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Output Configuration	Positive	Positive	Positive	Positive
Output Type	Fixed 5V	Fixed 5V	Fixed 5V	Fixed 5V
Number of Regulators	1	1	1	1
Voltage - Input (Max)	7V	7V	7V	7V
Current - Output	1.5A	1.5A	1.5A	1.5A
Voltage Dropout (Max)	0.55V @ 1.5A	0.38V @ 1.5A	0.38V @ 1.5A	0.55V @ 1.5A
Current - Quiescent (Iq)	5 mA	3 mA	3 mA	5 mA
Current - Supply (Max)	15 mA	10 mA	10 mA	15 mA
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)
Control Features	Enable	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	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	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Part Status	Discontinued at DiGi Electronics	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts—LP3852ESX-5.0/NOPB, LP3855ESX-5.0/NOPB, and LP3872ESX-5.0/NOPB—are electrically and mechanically compatible with the LP3875ESX-5.0 and meet the core substitution criteria.

LP3852ESX-5.0/NOPB and LP3855ESX-5.0/NOPB are both active products from Texas Instruments with ROHS3 compliance certification. These parts offer improved dropout voltage performance (0.38V @ 1.5A) and lower quiescent current (3 mA) compared to the original part, providing potential efficiency gains in power-sensitive applications.

LP3872ESX-5.0/NOPB is an active product from National Semiconductor with electrical characteristics matching the original LP3875ESX-5.0 (0.55V dropout, 5 mA quiescent current). This part maintains identical performance parameters to the discontinued device.

Selection between these substitutes should be based on availability, supply chain requirements, and compliance documentation needs for your specific application.

Frequently Asked Questions (FAQ)

Q: Can LP3852ESX-5.0/NOPB or LP3855ESX-5.0/NOPB be used as direct replacements for LP3875ESX-5.0?

A: Yes. Both parts meet all electrical and mechanical substitution criteria: identical 5V fixed output, 1.5A current rating, 7V maximum input voltage, TO-263 package, and full protection feature set. The improved dropout voltage and lower quiescent current are beneficial characteristics that do not affect compatibility.

Q: What is the difference between LP3852ESX-5.0/NOPB and LP3855ESX-5.0/NOPB?

A: Both parts share identical electrical specifications and performance characteristics. The primary difference is inventory availability and packaging options. Both are suitable substitutes for the LP3875ESX-5.0.

Q: Is LP3872ESX-5.0/NOPB from National Semiconductor compatible with the Texas Instruments LP3875ESX-5.0?

A: Yes. LP3872ESX-5.0/NOPB provides equivalent electrical performance with matching dropout voltage (0.55V @ 1.5A) and quiescent current (5 mA). The TO-263 package, output specifications, and protection features are identical, enabling direct substitution.

Q: Are all substitute parts in the same TO-263 package?

A: Yes. All substitute parts use the TO-263-6 D2PAK (5 Leads + Tab) package, ensuring identical PCB footprint and mounting compatibility with the original LP3875ESX-5.0.

Q: Do the substitute parts have the same operating temperature range?

A: Yes. All substitute parts operate across the -40°C ~ 125°C temperature range, matching the original device specifications.

Q: What compliance certifications apply to these substitute parts?

A: LP3852ESX-5.0/NOPB and LP3855ESX-5.0/NOPB carry ROHS3 compliance certification. LP3872ESX-5.0/NOPB compliance status is not specified in the provided data. Verify compliance requirements for your application before selection.

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