LP3875ES-1.8/NOPB Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3875ES-1.8/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 1.8V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. The device is currently in Active product status with 961 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when design revisions require alternative specifications, or when supply chain optimization requires component consolidation across manufacturing batches.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	1.8V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.55V @ 1.5A
Quiescent Current (Iq)	5 mA
Package Type	TO-263 (DDPAK-5)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LP3875ES-1.8/NOPB is determined by the following critical parameters:

Fixed output voltage of 1.8V
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
Positive output configuration with Enable control feature
Protection against over current, over temperature, and short circuit conditions

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage @ 1.5A	Quiescent Current	Supply Current (Max)	Package	Product Status	RoHS Status	Inventory
LP3875ES-1.8/NOPB	Texas Instruments	1.8V	1.5A	0.55V	5 mA	15 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant	961 Pcs
LP3852ES-1.8/NOPB	Texas Instruments	1.8V	1.5A	0.38V	3 mA	10 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant	913 Pcs
LP3855ES-1.8/NOPB	Texas Instruments	1.8V	1.5A	0.38V	3 mA	10 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant	1066 Pcs
LP3872ES-1.8/NOPB	Texas Instruments	1.8V	1.5A	0.55V	5 mA	15 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant	1115 Pcs
LP3962ES-1.8/NOPB	Texas Instruments	1.8V	1.5A	0.55V	9 mA	15 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant	1212 Pcs
LP3872ES-1.8	Texas Instruments	1.8V	1.5A	0.55V	5 mA	15 mA	TO-263 (DDPAK-5)	Not For New Designs	RoHS non-compliant	5350 Pcs

Engineering Selection Recommendations

All substitute parts with Active product status and ROHS3 compliance are suitable for new designs: LP3852ES-1.8/NOPB, LP3855ES-1.8/NOPB, LP3872ES-1.8/NOPB, and LP3962ES-1.8/NOPB.

LP3852ES-1.8/NOPB and LP3855ES-1.8/NOPB offer improved performance characteristics with lower dropout voltage (0.38V versus 0.55V) and reduced quiescent current (3 mA versus 5 mA), resulting in lower power dissipation in battery-powered or thermally constrained applications.

LP3872ES-1.8/NOPB maintains identical electrical specifications to the primary part and is recommended for direct replacement in existing designs.

LP3962ES-1.8/NOPB is functionally equivalent but exhibits higher quiescent current (9 mA) and should be selected only when other options are unavailable.

LP3872ES-1.8 (without /NOPB suffix) is marked as Not For New Designs and is RoHS non-compliant. This part is suitable only for legacy product support or repair applications where compliance exemptions apply.

Frequently Asked Questions (FAQ)

Q: Can LP3852ES-1.8/NOPB or LP3855ES-1.8/NOPB be used as direct replacements for LP3875ES-1.8/NOPB?

A: Yes. Both parts maintain the same output voltage (1.8V), output current (1.5A), input voltage rating (7V), and TO-263 package. The lower dropout voltage and quiescent current of these alternatives provide performance benefits in most applications.

Q: What is the difference between LP3872ES-1.8/NOPB and LP3872ES-1.8?

A: The /NOPB suffix indicates lead-free, RoHS3 compliant packaging. LP3872ES-1.8 is RoHS non-compliant and marked Not For New Designs. For new product development, use LP3872ES-1.8/NOPB exclusively.

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

A: Yes. All listed substitute parts use the TO-263 (DDPAK-5) package with identical pinout and mechanical dimensions, ensuring PCB compatibility without layout modifications.

Q: Which substitute offers the best power efficiency?

A: LP3852ES-1.8/NOPB and LP3855ES-1.8/NOPB provide the lowest dropout voltage (0.38V) and quiescent current (3 mA), minimizing power dissipation and heat generation compared to the primary part.

Q: Can LP3962ES-1.8/NOPB be used in applications requiring minimal quiescent current?

A: LP3962ES-1.8/NOPB has higher quiescent current (9 mA) than the primary part (5 mA). For applications with strict quiescent current requirements, LP3852ES-1.8/NOPB or LP3855ES-1.8/NOPB are preferred alternatives.

Q: Are all substitute parts certified for the same operating temperature range?

A: Yes. All substitute parts operate across -40°C to 125°C, matching the primary part specification.

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