LP3875ESX-2.5 Equivalent & Substitute Parts

Part Overview

The LP3875ESX-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 2.5V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. The main part is currently listed as obsolete, making equivalent substitute parts essential for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.55V @ 1.5A
Quiescent Current (Iq)	5 mA
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution eligibility for the LP3875ESX-2.5 is determined by the following critical parameters:

Fixed output voltage of 2.5V
Output current capability of 1.5A
Maximum input voltage of 7V
TO-263 (DDPAK-5) package compatibility
Operating temperature range of -40°C to 125°C
Enable control feature
Over Current, Over Temperature, and Short Circuit protection

Five substitute parts meet these core electrical and mechanical requirements. Substitutes are grouped into two categories based on voltage dropout characteristics and quiescent current specifications, which affect thermal performance and power efficiency in the application circuit.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Voltage Dropout @ 1.5A	Quiescent Current (Iq)	Product Status	RoHS Status	Packaging
LP3875ESX-2.5	Texas Instruments	2.5V	1.5A	0.55V	5 mA	Obsolete	Non-compliant	Bulk
LP3852ESX-2.5/NOPB	Texas Instruments	2.5V	1.5A	0.38V	3 mA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP3855ESX-2.5/NOPB	Texas Instruments	2.5V	1.5A	0.38V	3 mA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP3872ESX-2.5/NOPB	Texas Instruments	2.5V	1.5A	0.55V	5 mA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP3875ESX-2.5/NOPB	Texas Instruments	2.5V	1.5A	0.55V	5 mA	Active	ROHS3 Compliant	Tape & Reel (TR)
LP3962ESX-2.5/NOPB	National Semiconductor	2.5V	1.5A	0.55V	9 mA	Active	Not specified	Bulk
LP3965ESX-2.5/NOPB	Texas Instruments	2.5V	1.5A	0.55V	9 mA	Active	ROHS3 Compliant	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LP3875ESX-2.5/NOPB and LP3872ESX-2.5/NOPB are the most direct replacements for the obsolete LP3875ESX-2.5. Both are active products from Texas Instruments with ROHS3 compliance, identical voltage dropout and quiescent current specifications, and Tape & Reel packaging suitable for production environments.

Alternative Substitutes (Lower Dropout, Lower Quiescent Current):

LP3852ESX-2.5/NOPB and LP3855ESX-2.5/NOPB offer improved performance characteristics with 0.38V dropout and 3 mA quiescent current, reducing thermal dissipation and power consumption. Both are active Texas Instruments products with ROHS3 compliance and Tape & Reel packaging.

Secondary Substitutes (Higher Quiescent Current):

LP3962ESX-2.5/NOPB (National Semiconductor) and LP3965ESX-2.5/NOPB (Texas Instruments) maintain electrical equivalence but operate with 9 mA quiescent current. LP3965ESX-2.5/NOPB is ROHS3 compliant with Tape & Reel packaging. LP3962ESX-2.5/NOPB is available in bulk packaging.

All substitute parts share identical output voltage, output current, input voltage maximum, package type, operating temperature range, and protection features with the main part.

Frequently Asked Questions (FAQ)

Q: Can LP3852ESX-2.5/NOPB or LP3855ESX-2.5/NOPB replace LP3875ESX-2.5 in my design?

A: Yes. Both parts deliver 2.5V at 1.5A in the same TO-263 package. They offer superior performance with lower dropout voltage (0.38V vs 0.55V) and lower quiescent current (3 mA vs 5 mA), resulting in reduced heat generation and improved efficiency.

Q: What is the difference between LP3872ESX-2.5/NOPB and LP3875ESX-2.5/NOPB?

A: Both are electrically identical with 0.55V dropout and 5 mA quiescent current. The primary difference is product status: LP3875ESX-2.5 is obsolete, while LP3872ESX-2.5/NOPB is active. LP3872ESX-2.5/NOPB is the recommended direct replacement.

Q: Are all substitute parts in the same package?

A: All substitute parts use the TO-263-6 (D2PAK with 5 Leads + Tab) package, ensuring mechanical and electrical compatibility. Packaging format differs: most are supplied in Tape & Reel (TR) for production, while LP3962ESX-2.5/NOPB is available in bulk.

Q: Does RoHS compliance matter for my application?

A: The obsolete LP3875ESX-2.5 is RoHS non-compliant. All active substitutes except LP3962ESX-2.5/NOPB are ROHS3 compliant. Compliance requirements depend on your end-market and regulatory obligations.

Q: Which substitute has the lowest power consumption?

A: LP3852ESX-2.5/NOPB and LP3855ESX-2.5/NOPB have the lowest quiescent current at 3 mA and the lowest dropout voltage at 0.38V, minimizing standby power draw and thermal dissipation.

Q: Can I use LP3962ESX-2.5/NOPB from National Semiconductor?

A: Yes. LP3962ESX-2.5/NOPB meets all electrical and mechanical requirements. It operates with 9 mA quiescent current, higher than other substitutes. RoHS compliance status is not specified for this part.

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