LP3875ES-2.5 Equivalent & Substitute Parts

Part Overview

The LP3875ES-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 2.5V output at 1.5A maximum current in a surface-mount TO-263 (DDPAK-5) package. The main part is currently listed as obsolete, with 1,300 pieces in stock.

Substitute parts are necessary because the LP3875ES-2.5 has reached end-of-life status. Active alternatives with identical or superior electrical characteristics are available from Texas Instruments and other manufacturers, ensuring design continuity and long-term supply chain reliability.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	2.5	V
Output Current	1.5	A
Input Voltage (Maximum)	7	V
Voltage Dropout (Typical)	0.55	V @ 1.5A
Quiescent Current	5	mA
Operating Temperature Range	-40 to 125	°C
Package Type	TO-263 (DDPAK-5)	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution eligibility for the LP3875ES-2.5 is determined by the following critical parameters:

Primary Matching Criteria:

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

Substitution Categories:

Direct Equivalent (Identical Electrical Specifications): Parts with matching voltage dropout (0.55V @ 1.5A) and quiescent current (5 mA) specifications.

Parametric Equivalent (Enhanced Performance): Parts with improved voltage dropout (0.38V @ 1.5A) or reduced quiescent current (3 mA), providing superior efficiency while maintaining all critical electrical parameters.

Cross-Manufacturer Equivalent: Parts from alternative manufacturers (Microchip Technology, National Semiconductor) meeting all electrical and package requirements with active product status.

Parameter Comparison

Part Number	Manufacturer	Status	Vout (V)	Iout (A)	Vin Max (V)	Vdrop @ 1.5A (V)	Iq (mA)	Package	RoHS
LP3875ES-2.5	Texas Instruments	Obsolete	2.5	1.5	7	0.55	5	TO-263 (DDPAK-5)	Non-compliant
LP3875ES-2.5/NOPB	Texas Instruments	Active	2.5	1.5	7	0.55	5	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3852ES-2.5/NOPB	Texas Instruments	Active	2.5	1.5	7	0.38	3	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3855ES-2.5/NOPB	Texas Instruments	Active	2.5	1.5	7	0.38	3	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3872ES-2.5/NOPB	Texas Instruments	Active	2.5	1.5	7	0.55	5	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3962ES-2.5/NOPB	National Semiconductor	Active	2.5	1.5	7	0.55	9	TO-263 (DDPAK-5)	Not specified
LP3965ES-2.5/NOPB	Texas Instruments	Active	2.5	1.5	7	0.55	9	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3965ES-2.5	Texas Instruments	Last Time Buy	2.5	1.5	7	0.55	9	TO-263 (DDPAK-5)	ROHS3 Compliant
MCP1827-2502E/ET	Microchip Technology	Active	2.5	1.5	6	0.6	0.22	TO-263 (DDPAK-5)	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitute: LP3875ES-2.5/NOPB

The LP3875ES-2.5/NOPB is the direct equivalent of the obsolete LP3875ES-2.5. It maintains identical electrical specifications (0.55V dropout, 5 mA quiescent current) and is manufactured by Texas Instruments. This part has achieved ROHS3 compliance and is in active production status with 900 pieces currently in stock. This is the preferred choice for direct replacement in existing designs.

Recommended Enhanced Substitute: LP3852ES-2.5/NOPB or LP3855ES-2.5/NOPB

Both LP3852ES-2.5/NOPB and LP3855ES-2.5/NOPB offer improved performance characteristics with reduced voltage dropout (0.38V @ 1.5A) and lower quiescent current (3 mA). These enhancements result in lower power dissipation and improved thermal performance. Both parts are ROHS3 compliant and actively produced. LP3852ES-2.5/NOPB has the highest inventory availability (1,570 pieces).

Alternative Substitute: LP3872ES-2.5/NOPB

The LP3872ES-2.5/NOPB provides identical electrical performance to the original LP3875ES-2.5 with the advantage of active production status and ROHS3 compliance. Inventory availability is excellent at 2,246 pieces. This part is suitable when design modifications are not feasible.

Cross-Manufacturer Option: MCP1827-2502E/ET

The MCP1827-2502E/ET from Microchip Technology is functionally compatible with significantly lower quiescent current (0.22 mA). However, the maximum input voltage is limited to 6V (versus 7V for Texas Instruments parts) and includes additional control features (Power Good output, UVLO). This part is suitable only for applications where the 6V input limit is acceptable and the additional features are beneficial or neutral.

Not Recommended: LP3965ES-2.5 and LP3965ES-2.5/NOPB

The LP3965ES-2.5 is marked as Last Time Buy status. The LP3965ES-2.5/NOPB is active but exhibits higher quiescent current (9 mA) compared to the original specification (5 mA), resulting in increased power consumption. These parts should be avoided in favor of LP3875ES-2.5/NOPB or the enhanced alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use LP3852ES-2.5/NOPB as a direct replacement for LP3875ES-2.5?

A: Yes. Both parts deliver 2.5V at 1.5A in the same TO-263 (DDPAK-5) package with identical input voltage ratings and operating temperature range. The LP3852ES-2.5/NOPB actually provides superior performance with lower voltage dropout (0.38V versus 0.55V) and reduced quiescent current (3 mA versus 5 mA). No circuit modifications are required.

Q: What is the difference between LP3875ES-2.5 and LP3875ES-2.5/NOPB?

A: The primary difference is RoHS compliance status. LP3875ES-2.5 is RoHS non-compliant (obsolete), while LP3875ES-2.5/NOPB is ROHS3 compliant (active production). The electrical specifications are identical. The /NOPB designation indicates "No Lead (Pb)" and represents the RoHS-compliant version.

Q: Why does MCP1827-2502E/ET have such low quiescent current?

A: The MCP1827-2502E/ET uses a different internal architecture optimized for ultra-low standby current consumption (0.22 mA). However, this part has a lower maximum input voltage (6V versus 7V) and includes additional control features (Power Good output, UVLO) not present in the LP3875 series. Verify that your application's input voltage does not exceed 6V before selecting this part.

Q: Is the TO-263 (DDPAK-5) package identical across all substitute parts?

A: Yes. All substitute parts listed use the same TO-263 (DDPAK-5) surface-mount package with 5 leads plus tab. PCB layout and thermal management considerations remain unchanged. The MCP1827-2502E/ET uses the equivalent DDPAK-5 package designation.

Q: Which substitute part has the best inventory availability?

A: LP3872ES-2.5/NOPB has the highest inventory with 2,246 pieces in stock. LP3852ES-2.5/NOPB follows with 1,570 pieces. Both are suitable for immediate procurement.

Q: Can I use LP3965ES-2.5 for new designs?

A: LP3965ES-2.5 is marked as Last Time Buy status, indicating limited future availability. For new designs, select LP3875ES-2.5/NOPB, LP3852ES-2.5/NOPB, or LP3855ES-2.5/NOPB instead. These parts have active production status and long-term availability.

Q: What are the thermal implications of switching to LP3852ES-2.5/NOPB?

A: The LP3852ES-2.5/NOPB reduces voltage dropout from 0.55V to 0.38V at 1.5A output current. This 0.17V reduction decreases power dissipation in the regulator, resulting in lower junction temperature and reduced thermal stress. This is a beneficial change for thermal management.

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