LP3962EMPX-1.8 Equivalent & Substitute Parts

Part Overview

The LP3962EMPX-1.8 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 1.8V output at 1.5A maximum current in a SOT-223-5 surface mount package. The device features integrated protection against overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications.

The LP3962EMPX-1.8 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance of systems utilizing this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.8V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.55V @ 1.5A
Quiescent Current (Iq)	9 mA
Supply Current (Max)	15 mA
Output Configuration	Positive Fixed
Package Type	SOT-223-5
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP3962EMPX-1.8 are qualified based on the following critical parameters:

Fixed output voltage of 1.8V
Output current capability of 1.5A
Maximum input voltage of 7V
SOT-223-5 package compatibility
Operating temperature range of -40°C to 125°C
Positive fixed output configuration
Enable control feature
Protection features: Over Current, Over Temperature, Short Circuit

Substitutes are grouped into two categories based on voltage dropout characteristics:

Group A (0.43V Dropout): LP3852EMP-1.8, LP3852EMP-1.8/NOPB, LP3852EMPX-1.8/NOPB, LP3855EMP-1.8, LP3855EMP-1.8/NOPB

Group B (0.55V Dropout): LP3872EMP-1.8/NOPB, LP3875EMP-1.8/NOPB, LP3962EMP-1.8/NOPB, LP3965EMP-1.8/NOPB

All substitute parts maintain identical output voltage, current rating, input voltage limits, package type, operating temperature range, and protection features as the main part.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Dropout (Max)	Iq (mA)	Supply Current (Max)	Package	RoHS Status
LP3962EMPX-1.8	Texas Instruments	Obsolete	1.8V	1.5A	0.55V @ 1.5A	9	15 mA	SOT-223-5	RoHS non-compliant
LP3852EMP-1.8	Texas Instruments	Last Time Buy	1.8V	1.5A	0.43V @ 1.5A	3	10 mA	SOT-223-5	ROHS3 Compliant
LP3852EMP-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.43V @ 1.5A	3	10 mA	SOT-223-5	ROHS3 Compliant
LP3852EMPX-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.43V @ 1.5A	3	10 mA	SOT-223-5	ROHS3 Compliant
LP3855EMP-1.8	Texas Instruments	Obsolete	1.8V	1.5A	0.43V @ 1.5A	3	10 mA	SOT-223-5	RoHS non-compliant
LP3855EMP-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.43V @ 1.5A	3	10 mA	SOT-223-5	ROHS3 Compliant
LP3872EMP-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V @ 1.5A	5	15 mA	SOT-223-5	ROHS3 Compliant
LP3875EMP-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V @ 1.5A	5	15 mA	SOT-223-5	ROHS3 Compliant
LP3962EMP-1.8/NOPB	National Semiconductor	Active	1.8V	1.5A	0.55V @ 1.5A	9	15 mA	SOT-223	Not specified
LP3965EMP-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V @ 1.5A	9	15 mA	SOT-223-5	ROHS3 Compliant

Engineering Selection Recommendations

For new designs and ongoing production requiring LP3962EMPX-1.8 replacement, the following selection criteria apply:

Primary Recommendation (Active Status, RoHS3 Compliant): LP3852EMP-1.8/NOPB, LP3852EMPX-1.8/NOPB, LP3855EMP-1.8/NOPB, LP3872EMP-1.8/NOPB, LP3875EMP-1.8/NOPB, LP3965EMP-1.8/NOPB

These parts maintain active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Secondary Recommendation (Active Status, Dropout Matching): LP3872EMP-1.8/NOPB, LP3875EMP-1.8/NOPB, LP3965EMP-1.8/NOPB

These parts match the original 0.55V dropout specification and quiescent current characteristics of the LP3962EMPX-1.8, providing the closest electrical equivalence.

Alternative for Lower Power Consumption: LP3852EMP-1.8/NOPB, LP3852EMPX-1.8/NOPB, LP3855EMP-1.8/NOPB

These parts offer reduced quiescent current (3 mA vs. 9 mA) and lower supply current (10 mA vs. 15 mA), beneficial for battery-powered or low-power applications. The 0.43V dropout provides improved efficiency in low-input-voltage scenarios.

Parts with obsolete or last-time-buy status (LP3962EMPX-1.8, LP3852EMP-1.8, LP3855EMP-1.8) should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-1.8/NOPB directly replace LP3962EMPX-1.8?

A: Yes, from an electrical and mechanical standpoint. Both deliver 1.8V at 1.5A in SOT-223-5 packages with identical input voltage limits and operating temperature ranges. The LP3852EMP-1.8/NOPB has lower dropout voltage (0.43V vs. 0.55V) and reduced quiescent current (3 mA vs. 9 mA), making it functionally superior. The primary difference is product status: LP3962EMPX-1.8 is obsolete, while LP3852EMP-1.8/NOPB is active.

Q: What is the difference between LP3852EMP-1.8 and LP3852EMP-1.8/NOPB?

A: The /NOPB suffix indicates lead-free, halogen-free packaging compliant with RoHS3 standards. Both variants are electrically identical. LP3852EMP-1.8/NOPB is the preferred choice for new designs due to active product status and regulatory compliance.

Q: Why do some substitutes have different quiescent current values?

A: Quiescent current varies by device design. LP3852 and LP3855 series regulators feature lower quiescent current (3 mA) compared to LP3872, LP3875, LP3962, and LP3965 series (5-9 mA). Selection depends on application power budget requirements. Lower quiescent current is advantageous in standby or battery-powered applications.

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

A: All substitute parts use SOT-223-5 or SOT-223 packages, which are mechanically and electrically compatible. SOT-223-5 is the standard variant. LP3962EMP-1.8/NOPB uses SOT-223 designation but maintains pin compatibility.

Q: Which substitute offers the best efficiency?

A: LP3852EMP-1.8/NOPB and LP3855EMP-1.8/NOPB provide the lowest dropout voltage (0.43V) and quiescent current (3 mA), resulting in superior efficiency across the operating range. These are optimal for applications where power dissipation and battery life are critical.

Q: Is RoHS compliance important for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and increasingly required by global manufacturers. All active substitute parts (LP3852EMP-1.8/NOPB, LP3855EMP-1.8/NOPB, LP3872EMP-1.8/NOPB, LP3875EMP-1.8/NOPB, LP3965EMP-1.8/NOPB) are ROHS3 compliant. The original LP3962EMPX-1.8 is RoHS non-compliant and should not be used in new designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message