LP3852ESX-2.5 Equivalent & Substitute Parts

Part Overview

The LP3852ESX-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 2.5V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. The main part number LP3852ESX-2.5 carries an obsolete product status, making substitute parts necessary for new designs and ongoing production requirements. Active equivalent models are available from Texas Instruments and National Semiconductor that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.38V @ 1.5A
Quiescent Current (Iq)	3 mA
Operating Temperature Range	-40°C to 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the LP3852ESX-2.5 is determined by the following critical parameters that must remain constant across all equivalent parts:

Output voltage: 2.5V fixed
Output current capability: 1.5A
Maximum input voltage: 7V
Package type: TO-263 (DDPAK-5)
Surface mount configuration
Protection features: Over Current, Over Temperature, Short Circuit
Enable control feature
Operating temperature range: -40°C to 125°C

Substitute parts are grouped into two categories:

Direct Equivalent (Same Base Model): LP3852ESX-2.5/NOPB maintains identical electrical specifications with improved product status (Active vs. Obsolete) and RoHS3 compliance.

Parametric Equivalents (Alternative Base Models): LP3855ESX-2.5/NOPB, LP3872ESX-2.5/NOPB, LP3875ESX-2.5/NOPB, LP3962ESX-2.5/NOPB, and LP3965ESX-2.5/NOPB share the same output voltage, current rating, input voltage maximum, package type, and protection features. Variations exist in voltage dropout characteristics and quiescent current specifications, which are secondary parameters that do not prevent functional substitution within the defined electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Input Voltage (Max)	Voltage Dropout @ 1.5A	Quiescent Current (Iq)	Package	RoHS Status
LP3852ESX-2.5	Texas Instruments	Obsolete	2.5V	1.5A	7V	0.38V	3 mA	TO-263 (DDPAK-5)	Non-compliant
LP3852ESX-2.5/NOPB	Texas Instruments	Active	2.5V	1.5A	7V	0.38V	3 mA	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3855ESX-2.5/NOPB	Texas Instruments	Active	2.5V	1.5A	7V	0.38V	3 mA	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3872ESX-2.5/NOPB	Texas Instruments	Active	2.5V	1.5A	7V	0.55V	5 mA	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3875ESX-2.5/NOPB	Texas Instruments	Active	2.5V	1.5A	7V	0.55V	5 mA	TO-263 (DDPAK-5)	ROHS3 Compliant
LP3962ESX-2.5/NOPB	National Semiconductor	Active	2.5V	1.5A	7V	0.55V	9 mA	TO-263 (DDPAK-5)	Not specified
LP3965ESX-2.5/NOPB	Texas Instruments	Active	2.5V	1.5A	7V	0.55V	9 mA	TO-263 (DDPAK-5)	ROHS3 Compliant

Engineering Selection Recommendations

For New Designs and Production: LP3852ESX-2.5/NOPB is the primary substitute, offering identical electrical performance to the obsolete LP3852ESX-2.5 with Active product status and ROHS3 compliance. This part maintains the lowest voltage dropout (0.38V @ 1.5A) and quiescent current (3 mA) specifications.

For Designs with Relaxed Dropout Requirements: LP3855ESX-2.5/NOPB provides equivalent performance to LP3852ESX-2.5/NOPB with Active status and ROHS3 compliance, suitable for applications where the 0.38V dropout specification is not critical.

For Alternative Sourcing: LP3872ESX-2.5/NOPB and LP3875ESX-2.5/NOPB are Active alternatives with increased voltage dropout (0.55V @ 1.5A) and quiescent current (5 mA). These parts remain functionally compatible within the defined electrical envelope and carry ROHS3 compliance.

For Extended Availability: LP3965ESX-2.5/NOPB offers the highest inventory availability with Active status and ROHS3 compliance, though it exhibits the highest quiescent current (9 mA) among the group.

For Cross-Manufacturer Options: LP3962ESX-2.5/NOPB from National Semiconductor provides functional equivalence with Active status. RoHS compliance status is not specified for this part.

All substitute parts maintain the same TO-263 (DDPAK-5) package configuration, surface mount capability, and protection features (Over Current, Over Temperature, Short Circuit) as the original LP3852ESX-2.5.

Frequently Asked Questions (FAQ)

Q: Can LP3852ESX-2.5/NOPB directly replace the obsolete LP3852ESX-2.5?

A: Yes. LP3852ESX-2.5/NOPB is the direct equivalent with identical electrical specifications (2.5V output, 1.5A current, 0.38V dropout @ 1.5A, 3 mA quiescent current) and the same TO-263 (DDPAK-5) package. The primary differences are Active product status and ROHS3 compliance.

Q: What is the difference between LP3852ESX-2.5/NOPB and LP3855ESX-2.5/NOPB?

A: Both parts deliver 2.5V at 1.5A in the same TO-263 package with identical voltage dropout (0.38V @ 1.5A) and quiescent current (3 mA). The base model number differs (LP3852 vs. LP3855), but electrical performance is equivalent. Both carry Active status and ROHS3 compliance.

Q: Why do some substitute parts have higher voltage dropout (0.55V vs. 0.38V)?

A: LP3872ESX-2.5/NOPB, LP3875ESX-2.5/NOPB, LP3962ESX-2.5/NOPB, and LP3965ESX-2.5/NOPB have increased voltage dropout specifications. These parts remain functionally compatible for applications where the input voltage margin accommodates the higher dropout. The 2.5V output voltage and 1.5A current capability are maintained.

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

A: Yes. All substitute parts use the TO-263-6 package configuration (D2PAK with 5 Leads + Tab), maintaining identical PCB footprint and surface mount compatibility with the original LP3852ESX-2.5.

Q: Which substitute part has the lowest quiescent current?

A: LP3852ESX-2.5/NOPB and LP3855ESX-2.5/NOPB both specify 3 mA quiescent current, matching the original LP3852ESX-2.5. LP3872ESX-2.5/NOPB and LP3875ESX-2.5/NOPB increase to 5 mA, while LP3962ESX-2.5/NOPB and LP3965ESX-2.5/NOPB reach 9 mA.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates the part is supplied in Tape & Reel packaging (or Bulk for LP3962ESX-2.5/NOPB) without plumbum (lead-free). This distinguishes packaging format from the base part number.

Q: Are all substitute parts RoHS compliant?

A: LP3852ESX-2.5/NOPB, LP3855ESX-2.5/NOPB, LP3872ESX-2.5/NOPB, LP3875ESX-2.5/NOPB, and LP3965ESX-2.5/NOPB are ROHS3 compliant. LP3962ESX-2.5/NOPB does not specify RoHS compliance status.

Q: Can I use LP3962ESX-2.5/NOPB from National Semiconductor as a substitute?

A: Yes. LP3962ESX-2.5/NOPB maintains the same 2.5V output, 1.5A current, 7V maximum input voltage, and TO-263 package. It is functionally equivalent despite the different manufacturer and unspecified RoHS status.

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