LP3875ES-1.8 Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP3875ES-1.8 is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed 1.8V output applications with 1.5A current capacity in a TO-263 (DDPAK-5) surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing production support and new design implementations. The device provides regulated 1.8V output with integrated protection features including over-current, over-temperature, and short-circuit protection, making it suitable for power management applications requiring stable low-voltage rails.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LP3875ES-1.8
Product Category	Power Management (PMIC)
Output Configuration	Positive Fixed
Output Voltage	1.8V
Output Current	1.5A
Input Voltage (Max)	7V
Dropout Voltage	0.55V @ 1.5A
Quiescent Current	5 mA
Operating Temperature Range	-40°C to 125°C
Package Type	TO-263-6 (DDPAK-5)
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the LP3875ES-1.8 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Output voltage: 1.8V fixed
Output current capacity: 1.5A minimum
Input voltage maximum: 7V
Package type: TO-263-6 (DDPAK-5) surface mount
Output configuration: Positive fixed
Protection features: Over-current, over-temperature, short-circuit protection
Operating temperature range: -40°C to 125°C minimum

Substitution Categories:

Direct Manufacturer Substitutes maintain identical electrical specifications and are pin-compatible replacements. LP3875ES-1.8/NOPB is the direct equivalent with active product status and RoHS3 compliance.

Parametric Equivalents meet all critical electrical and mechanical requirements but may have minor variations in secondary parameters such as quiescent current, dropout voltage, or PSRR characteristics. These include LP3852ES-1.8/NOPB, LP3855ES-1.8/NOPB, LP3872ES-1.8/NOPB, LP3962ES-1.8/NOPB, LP3965ES-1.8/NOPB, and LP3872ES-1.8.

All substitute parts maintain the same TO-263 package footprint, pin configuration, and functional output specifications required for direct board-level replacement.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage @ 1.5A	Quiescent Current	Supply Current (Max)	Operating Temp Range	Package	RoHS Status
LP3875ES-1.8	Texas Instruments	Obsolete	1.8V	1.5A	7V	0.55V	5 mA	15 mA	-40°C to 125°C	TO-263-6	Non-compliant
LP3875ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	7V	0.55V	5 mA	15 mA	-40°C to 125°C	TO-263-6	RoHS3 Compliant
LP3852ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	7V	0.38V	3 mA	10 mA	-40°C to 125°C	TO-263-6	RoHS3 Compliant
LP3855ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	7V	0.38V	3 mA	10 mA	-40°C to 125°C	TO-263-6	RoHS3 Compliant
LP3872ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	7V	0.55V	5 mA	15 mA	-40°C to 125°C	TO-263-6	RoHS3 Compliant
LP3962ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	7V	0.55V	9 mA	15 mA	-40°C to 125°C	TO-263-6	RoHS3 Compliant
LP3965ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	7V	0.55V	9 mA	15 mA	-40°C to 125°C	TO-263-6	RoHS3 Compliant
LP3872ES-1.8	Texas Instruments	Not For New Designs	1.8V	1.5A	7V	0.55V	5 mA	15 mA	-40°C to 125°C	TO-263-6	Non-compliant

Engineering Selection Recommendations

For New Designs and Production Support:

LP3875ES-1.8/NOPB is the primary recommended substitute. This part maintains identical electrical specifications to the obsolete LP3875ES-1.8 while offering active product status and RoHS3 compliance. The /NOPB designation indicates lead-free manufacturing, meeting current environmental and regulatory requirements.

For Applications Prioritizing Power Efficiency:

LP3852ES-1.8/NOPB and LP3855ES-1.8/NOPB offer improved performance characteristics with reduced dropout voltage (0.38V versus 0.55V) and lower quiescent current (3 mA versus 5 mA). These devices are suitable for battery-powered or power-constrained applications where efficiency gains are beneficial. Both parts maintain active product status and RoHS3 compliance.

For Existing Inventory Management:

LP3872ES-1.8/NOPB and LP3962ES-1.8/NOPB provide parametric equivalence with active status and RoHS3 compliance. LP3872ES-1.8/NOPB matches the original specifications exactly. LP3962ES-1.8/NOPB introduces slightly elevated quiescent current (9 mA) but remains functionally equivalent for most applications.

Parts to Avoid in New Designs:

LP3872ES-1.8 carries "Not For New Designs" status and RoHS non-compliance. This variant should be used only for legacy system maintenance where substitution is not feasible.

Frequently Asked Questions (FAQ)

Q: Can LP3875ES-1.8/NOPB be used as a direct replacement for LP3875ES-1.8?

A: Yes. LP3875ES-1.8/NOPB is the direct manufacturer equivalent with identical electrical specifications, pin configuration, and TO-263 package footprint. The only differences are active product status and RoHS3 compliance, making it the preferred substitute.

Q: What is the difference between LP3852ES-1.8/NOPB and LP3855ES-1.8/NOPB?

A: Both parts are parametric equivalents with identical specifications. They share the same dropout voltage (0.38V), quiescent current (3 mA), and all other critical parameters. Selection between them depends on availability and inventory management rather than technical differentiation.

Q: Are LP3962ES-1.8/NOPB and LP3965ES-1.8/NOPB interchangeable with the original LP3875ES-1.8?

A: Yes, both are parametric equivalents meeting all critical electrical and mechanical requirements. They maintain 1.8V output, 1.5A capacity, and TO-263 packaging. The primary difference is elevated quiescent current (9 mA versus 5 mA), which may impact power consumption in standby conditions but does not affect functional compatibility.

Q: Why do some substitute parts have lower dropout voltage?

A: LP3852ES-1.8/NOPB and LP3855ES-1.8/NOPB feature improved internal design with 0.38V dropout voltage compared to 0.55V in the original. This represents a performance enhancement allowing operation with lower input voltages or reduced thermal dissipation. These parts are fully compatible replacements suitable for applications where efficiency is prioritized.

Q: Is the TO-263 package footprint identical across all substitute parts?

A: Yes. All substitute parts use TO-263-6 (DDPAK-5) surface mount packaging with identical pin configuration and mechanical dimensions. Direct board-level substitution is possible without PCB redesign.

Q: What does the /NOPB designation indicate?

A: /NOPB indicates lead-free (No Lead) manufacturing and RoHS3 compliance. This designation reflects current environmental regulations and manufacturing standards. Parts without /NOPB designation may contain lead and do not meet RoHS requirements.

Q: Can LP3872ES-1.8 (without /NOPB) be used in new production?

A: No. This part carries "Not For New Designs" status and RoHS non-compliance. It should be reserved for legacy system maintenance only. Use LP3872ES-1.8/NOPB for new applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message