LP3872EMP-2.5 Equivalent & Substitute Parts

Part Overview

The LP3872EMP-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 SOT-223-5 surface mount package. The main part is currently listed as obsolete, making equivalent and substitute parts essential for ongoing design support and production continuity. Alternative models with identical or superior electrical characteristics are available from active product lines.

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
Supply Current (Max)	15 mA
PSRR	73dB ~ 57dB (120Hz)
Operating Temperature Range	-40°C ~ 125°C
Package Type	SOT-223-5 (TO-261-5, TO-261AB)
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP3872EMP-2.5 are classified into two categories based on electrical parameter alignment:

Direct Manufacturer Equivalents maintain identical electrical specifications including voltage dropout (0.55V @ 1.5A), quiescent current (5 mA), and supply current (15 mA). These parts are pin-compatible and functionally interchangeable.

Parametric Equivalents provide superior performance characteristics while maintaining the same output voltage (2.5V), output current (1.5A), input voltage rating (7V), and operating temperature range (-40°C ~ 125°C). These parts feature reduced voltage dropout (0.44V @ 1.5A) and lower quiescent current (3 mA), offering improved efficiency.

All substitute parts share the following critical parameters with the main part:

Fixed 2.5V output voltage
1.5A maximum output current
7V maximum input voltage
SOT-223-5 package compatibility
Enable control feature
Over Current, Over Temperature, and Short Circuit protection

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Dropout @ 1.5A	Quiescent Current (Iq)	Supply Current (Max)	RoHS Status	Packaging
LP3872EMP-2.5	Texas Instruments	Obsolete	0.55V	5 mA	15 mA	Non-compliant	Bulk
LP3872EMP-2.5/NOPB	National Semiconductor	Active	0.55V	5 mA	15 mA	Not specified	Bulk
LP3852EMP-2.5/NOPB	Texas Instruments	Active	0.44V	3 mA	10 mA	ROHS3 Compliant	Bulk
LP3855EMP-2.5/NOPB	Texas Instruments	Active	0.44V	3 mA	10 mA	ROHS3 Compliant	Tape & Reel
LP3872EMPX-2.5/NOPB	National Semiconductor	Active	0.55V	5 mA	15 mA	Not specified	Bulk
LP3875EMP-2.5/NOPB	Texas Instruments	Active	0.55V	5 mA	15 mA	ROHS3 Compliant	Tape & Reel
LP3962EMP-2.5/NOPB	Texas Instruments	Active	0.55V	9 mA	15 mA	ROHS3 Compliant	Tape & Reel
LP3965EMP-2.5/NOPB	Texas Instruments	Active	0.55V	9 mA	15 mA	ROHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): LP3872EMP-2.5/NOPB and LP3872EMPX-2.5/NOPB are direct functional equivalents with active product status, ensuring long-term availability and supply chain continuity.

For Improved Efficiency (Parametric Upgrade): LP3852EMP-2.5/NOPB and LP3855EMP-2.5/NOPB offer superior performance with reduced voltage dropout (0.44V vs. 0.55V) and lower quiescent current (3 mA vs. 5 mA). Both are ROHS3 compliant and actively manufactured by Texas Instruments.

For Compliance-Critical Applications: LP3855EMP-2.5/NOPB, LP3875EMP-2.5/NOPB, LP3962EMP-2.5/NOPB, and LP3965EMP-2.5/NOPB all carry ROHS3 compliance certification, meeting regulatory requirements for restricted substance use.

For High-Volume Production: LP3962EMP-2.5/NOPB and LP3965EMP-2.5/NOPB provide the highest inventory availability (3400 and 1857 units respectively) with active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use LP3852EMP-2.5/NOPB as a direct replacement for LP3872EMP-2.5? A: Yes. Both devices maintain identical output voltage (2.5V), output current (1.5A), input voltage rating (7V), and package type (SOT-223-5). The LP3852EMP-2.5/NOPB offers improved performance with lower voltage dropout and quiescent current.

Q: What is the difference between LP3872EMP-2.5/NOPB and LP3872EMPX-2.5/NOPB? A: Both parts are electrically identical with matching voltage dropout (0.55V @ 1.5A), quiescent current (5 mA), and supply current (15 mA). The difference lies in manufacturing date codes and packaging handling; both are active products from National Semiconductor.

Q: Are all substitute parts compatible with the SOT-223-5 package footprint? A: Yes. All listed substitute parts use the SOT-223-5 package (TO-261-5, TO-261AB case), ensuring mechanical and electrical compatibility with existing PCB designs.

Q: Which substitute part offers the best power efficiency? A: LP3852EMP-2.5/NOPB and LP3855EMP-2.5/NOPB deliver the lowest voltage dropout (0.44V @ 1.5A) and quiescent current (3 mA), reducing power dissipation and improving overall system efficiency.

Q: Do all substitute parts include the same protection features? A: Yes. All substitute parts include Over Current, Over Temperature, and Short Circuit protection, matching the protection feature set of the original LP3872EMP-2.5.

Q: What is the significance of the /NOPB suffix? A: The /NOPB designation indicates "No Plumbum" (lead-free) packaging, confirming RoHS compliance for parts carrying this suffix.

Q: Can I mix different substitute parts in the same production batch? A: All substitute parts maintain identical electrical specifications for the critical parameters (output voltage, output current, input voltage, operating temperature range, and protection features), allowing interchangeability within the same design.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message