LP3852EMP-2.5/NOPB Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3852EMP-2.5/NOPB is an active linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 1.5A continuous current at a fixed 2.5V output with a maximum dropout voltage of 0.44V at full load. The device is housed in a SOT-223-5 surface mount package and includes integrated protection features for over-current, over-temperature, and short-circuit conditions. With an operating temperature range of -40°C to 125°C and ROHS3 compliance, this regulator is suitable for battery-powered applications, portable electronics, and industrial systems requiring stable low-voltage power delivery. Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and functional equivalence within the LP38xx regulator family.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LP3852EMP-2.5/NOPB
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage Output (Fixed)	2.5V
Current Output	1.5A
Voltage Input (Max)	7V
Dropout Voltage (Max)	0.44V @ 1.5A
Quiescent Current	3 mA
Package / Case	SOT-223-5
Mounting Type	Surface Mount
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3852EMP-2.5/NOPB are identified based on strict electrical and mechanical parameter matching within the LP38xx linear regulator family. The substitution criteria are:

Primary Matching Parameters:

Fixed output voltage of 2.5V
Output current rating of 1.5A
Maximum input voltage of 7V
Surface mount SOT-223-5 package configuration
Positive output configuration with fixed output type
Operating temperature range of -40°C to 125°C
Integrated protection features (over-current, over-temperature, short-circuit)
Enable control feature
ROHS3 compliance and REACH unaffected status

Secondary Variation Parameters: Substitute parts may differ in dropout voltage (0.44V to 0.55V), quiescent current (3 mA to 9 mA), and supply current specifications. These variations remain within acceptable operational tolerances for equivalent functionality in the same application class.

Parameter Comparison

Parameter	LP3852EMP-2.5/NOPB	LP3855EMP-2.5/NOPB	LP3872EMP-2.5/NOPB	LP3875EMP-2.5/NOPB	LP3965EMP-2.5/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	2.5V	2.5V	2.5V	2.5V	2.5V
Output Current	1.5A	1.5A	1.5A	1.5A	1.5A
Input Voltage (Max)	7V	7V	7V	7V	7V
Dropout Voltage (Max)	0.44V @ 1.5A	0.44V @ 1.5A	0.55V @ 1.5A	0.55V @ 1.5A	0.55V @ 1.5A
Quiescent Current	3 mA	3 mA	5 mA	5 mA	9 mA
Supply Current (Max)	10 mA	10 mA	15 mA	15 mA	15 mA
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	Not Specified
Package / Case	SOT-223-5	SOT-223-5	SOT-223	SOT-223-5	SOT-223-5
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain active product status with ROHS3 compliance (where specified), ensuring regulatory alignment and long-term availability. Selection between the LP3852EMP-2.5/NOPB and its equivalents depends on specific application requirements:

LP3855EMP-2.5/NOPB provides identical electrical performance to the main part with matching dropout voltage (0.44V) and quiescent current (3 mA). This part is supplied in Tape & Reel packaging and represents a direct functional equivalent.

LP3872EMP-2.5/NOPB from National Semiconductor offers equivalent core functionality with slightly higher dropout voltage (0.55V) and quiescent current (5 mA). This part is available in bulk packaging and maintains the same protection and control features.

LP3875EMP-2.5/NOPB provides equivalent performance with dropout voltage of 0.55V and quiescent current of 5 mA. This part is supplied in Tape & Reel packaging and maintains full ROHS3 compliance.

LP3965EMP-2.5/NOPB offers equivalent functionality with higher quiescent current (9 mA) and unspecified PSRR. This part is supplied in Tape & Reel packaging and maintains ROHS3 compliance. PSRR specification absence should be verified against application noise rejection requirements.

All parts share identical output voltage, current rating, input voltage maximum, operating temperature range, and protection feature set. Packaging format and quiescent current variations allow selection based on supply chain availability and power consumption constraints.

Frequently Asked Questions (FAQ)

Q: Can LP3855EMP-2.5/NOPB replace LP3852EMP-2.5/NOPB directly?

A: Yes. Both parts share identical electrical specifications including 0.44V dropout voltage, 3 mA quiescent current, and 2.5V fixed output at 1.5A. The primary difference is packaging format (Tape & Reel versus standard). PCB layout and thermal management remain unchanged.

Q: What is the impact of higher dropout voltage in LP3872EMP-2.5/NOPB and LP3875EMP-2.5/NOPB?

A: These parts specify 0.55V dropout voltage compared to 0.44V in the LP3852. This 0.11V increase requires proportionally higher input voltage headroom to maintain regulated output. For applications with tight input voltage margins, verify that the maximum input voltage of 7V remains sufficient after accounting for the higher dropout.

Q: Is LP3965EMP-2.5/NOPB suitable for battery-powered applications?

A: LP3965EMP-2.5/NOPB has higher quiescent current (9 mA) compared to LP3852 (3 mA). For battery-powered designs where standby current is critical, the LP3852 or LP3855 are preferred. The LP3965 is suitable for applications where quiescent current is not a limiting factor.

Q: Are all substitute parts available in the same SOT-223-5 package?

A: LP3852, LP3855, LP3875, and LP3965 are all specified in SOT-223-5 packages. LP3872 is specified in SOT-223 package. Verify PCB footprint compatibility before substitution, as minor package variations may exist between SOT-223 and SOT-223-5 designations.

Q: What is the difference between Tape & Reel and Bulk packaging?

A: Tape & Reel packaging is standard for automated assembly lines and high-volume production. Bulk packaging is used for manual assembly or lower-volume applications. Both formats contain identical components; packaging selection depends on manufacturing process requirements, not electrical performance.

Q: Do all substitute parts maintain ROHS3 compliance?

A: LP3852, LP3855, LP3875, and LP3965 are explicitly ROHS3 compliant. LP3872 compliance status is not specified in available documentation. For applications requiring certified ROHS3 compliance, verify LP3872 documentation or select from the explicitly compliant alternatives.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided that input voltage headroom accommodates the higher dropout voltage specifications of LP3872, LP3875, and LP3965. Verify quiescent current specifications against power budget requirements. All parts maintain identical output voltage, current rating, protection features, and operating temperature range.

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