LP3875ES-3.3 Equivalent & Substitute Parts

Part Overview

The LP3875ES-3.3 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 3.3V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design updates. The part provides positive fixed output configuration with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable 3.3V regulation from input sources up to 7V.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.55V @ 1.5A
Quiescent Current (Iq)	5 mA
Operating Temperature Range	-40°C to 125°C
Package Type	TO-263 (DDPAK-5)
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the LP3875ES-3.3 is determined by the following critical parameters:

Fixed output voltage of 3.3V
Output current capability of 1.5A minimum
Maximum input voltage of 7V or greater
Surface mount TO-263 (DDPAK-5) package compatibility
Operating temperature range of -40°C to 125°C
Enable control feature
Protection against over-current, over-temperature, and short-circuit conditions

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Texas Instruments LP38xx Series): Parts with identical or superior electrical specifications and active product status, including LP3875ES-3.3/NOPB, LP3872ES-3.3/NOPB, LP3855ES-3.3/NOPB, LP3852ES-3.3/NOPB, LP3965ES-3.3, and LP3965ES-3.3/NOPB.

Manufacturer-Recommended Alternative (Microchip Technology): MCP1827-3302E/ET provides equivalent functionality with different quiescent current characteristics and additional control features (Power Good output, UVLO protection).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage @ 1.5A	Quiescent Current	Product Status	RoHS Compliance
LP3875ES-3.3	Texas Instruments	3.3V	1.5A	7V	0.55V	5 mA	Obsolete	Non-compliant
LP3875ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	7V	0.55V	5 mA	Active	ROHS3 Compliant
LP3852ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	7V	0.38V	3 mA	Active	ROHS3 Compliant
LP3855ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	7V	0.38V	3 mA	Active	ROHS3 Compliant
LP3872ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	7V	0.55V	5 mA	Active	ROHS3 Compliant
LP3965ES-3.3	Texas Instruments	3.3V	1.5A	7V	0.55V	9 mA	Last Time Buy	ROHS3 Compliant
LP3965ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	7V	0.55V	9 mA	Active	ROHS3 Compliant
LP3962ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	7V	0.55V	9 mA	Active	ROHS3 Compliant
LP3852ES-3.3	Texas Instruments	3.3V	1.5A	7V	0.38V	3 mA	Last Time Buy	ROHS3 Compliant
MCP1827-3302E/ET	Microchip Technology	3.3V	1.5A	6V	0.6V	220 µA	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Texas Instruments LP38xx Series):

For designs requiring direct replacement with active product status and RoHS3 compliance, LP3875ES-3.3/NOPB is the direct equivalent. This part maintains identical electrical specifications while offering improved compliance status compared to the obsolete original.

LP3852ES-3.3/NOPB and LP3855ES-3.3/NOPB provide superior performance characteristics with reduced dropout voltage (0.38V vs. 0.55V) and lower quiescent current (3 mA vs. 5 mA), beneficial for battery-powered or thermally constrained applications.

LP3872ES-3.3/NOPB matches the original specifications exactly while providing active product status and RoHS3 compliance.

LP3965ES-3.3/NOPB and LP3962ES-3.3/NOPB are active alternatives with identical dropout voltage but higher quiescent current (9 mA), suitable when supply current is not a limiting factor.

Alternative Manufacturer Option:

MCP1827-3302E/ET from Microchip Technology provides equivalent 3.3V/1.5A regulation in the same TO-263 package. This part features significantly lower quiescent current (220 µA) and includes additional control features (Power Good output, UVLO protection). Maximum input voltage is 6V, which is acceptable for most 7V-rated applications but should be verified for designs operating near the upper input limit.

Compliance Considerations:

All recommended substitutes carry ROHS3 compliance and REACH unaffected status. The original LP3875ES-3.3 is RoHS non-compliant; migration to any substitute improves regulatory compliance for new production.

Frequently Asked Questions (FAQ)

Q: Can LP3875ES-3.3/NOPB directly replace LP3875ES-3.3?

A: Yes. LP3875ES-3.3/NOPB is the direct equivalent with identical electrical specifications. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Both use TO-263 (DDPAK-5) packaging and are pin-compatible.

Q: What is the difference between LP3852ES-3.3/NOPB and LP3875ES-3.3?

A: Both deliver 3.3V at 1.5A in TO-263 packaging. LP3852ES-3.3/NOPB has lower dropout voltage (0.38V vs. 0.55V) and lower quiescent current (3 mA vs. 5 mA). These improvements reduce power dissipation and heat generation, making it suitable for applications with tight thermal budgets or low-power requirements.

Q: Is MCP1827-3302E/ET compatible with the LP3875ES-3.3?

A: MCP1827-3302E/ET provides equivalent 3.3V/1.5A output in the same TO-263 package and is pin-compatible. The maximum input voltage is 6V instead of 7V. Verify your application's input voltage range before selection. The Microchip part includes Power Good output and UVLO protection, which are not present in the Texas Instruments part.

Q: Why do some part numbers include "/NOPB" suffix?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS3 compliance. Parts without this suffix may have different compliance status. For new designs, parts with "/NOPB" are recommended.

Q: Can I use LP3965ES-3.3 in place of LP3875ES-3.3?

A: Yes, electrically. LP3965ES-3.3 maintains identical output voltage, current, and dropout specifications. However, it has higher quiescent current (9 mA vs. 5 mA) and Last Time Buy status. For new designs, LP3965ES-3.3/NOPB (Active status) is preferred over the non-suffixed version.

Q: What is the impact of different quiescent currents?

A: Quiescent current is the regulator's internal supply current when delivering no load current. Lower quiescent current reduces total power consumption and heat dissipation. LP3852ES-3.3/NOPB and LP3855ES-3.3/NOPB (3 mA) are more efficient than LP3875ES-3.3 (5 mA) or LP3965ES-3.3/NOPB (9 mA). For battery-powered applications, lower quiescent current extends operating time.

Q: Are all substitutes available in the same packaging?

A: Yes. All listed substitutes use TO-263 (DDPAK-5) surface mount packaging, ensuring PCB layout compatibility. Verify footprint dimensions with component datasheets for any custom designs.

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