LP3852EMP-3.3 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3852EMP-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications. This Surface Mount device in SOT-223-5 package delivers 1.5A output current with integrated protection features including over-current, over-temperature, and short-circuit protection. The main part carries Last Time Buy status, making identification of active equivalent and substitute parts essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	1.5A
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.44V @ 1.5A
Quiescent Current (Iq)	3 mA
Operating Temperature Range	-40°C to 125°C
Package Type	SOT-223-5 (TO-261-5, TO-261AB)
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for LP3852EMP-3.3 is determined by the following critical parameters:

Primary Matching Criteria:

Output voltage: 3.3V fixed
Output current capability: 1.5A minimum
Input voltage maximum: 7V
Package type: SOT-223-5
Mounting type: Surface Mount
Protection features: Over Current, Over Temperature, Short Circuit
Operating temperature range: -40°C to 125°C
RoHS3 compliance

Secondary Considerations:

Voltage dropout characteristics
Quiescent current consumption
Product status (Active vs. Last Time Buy)
Packaging format (Cut Tape vs. Tape & Reel)

All identified substitute parts meet the primary matching criteria. Variations in quiescent current and dropout voltage represent design trade-offs within the same functional class and do not preclude substitution when electrical specifications remain within system requirements.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout (Max)	Iq (mA)	Supply Current (Max)	Product Status	Packaging	Inventory
LP3852EMP-3.3	Texas Instruments	3.3V	1.5A	0.44V @ 1.5A	3	10 mA	Last Time Buy	Cut Tape (CT) & Digi-Reel®	1507 Pcs
LP3852EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.44V @ 1.5A	3	10 mA	Active	Tape & Reel (TR)	2200 Pcs
LP3855EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.44V @ 1.5A	3	10 mA	Active	Tape & Reel (TR)	2396 Pcs
LP3872EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	5	15 mA	Active	Cut Tape (CT) & Digi-Reel®	55342 Pcs
LP3872EMPX-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	5	15 mA	Active	Tape & Reel (TR)	2997 Pcs
LP3875EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	5	15 mA	Active	Tape & Reel (TR)	1715 Pcs
LP3962EMP-3.3	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	9	15 mA	Last Time Buy	Tape & Reel (TR)	1200 Pcs
LP3962EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	9	15 mA	Active	Cut Tape (CT) & Digi-Reel®	1695 Pcs
LP3965EMP-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V @ 1.5A	9	15 mA	Active	Cut Tape (CT) & Digi-Reel®	1401 Pcs

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Preferred for Immediate Substitution):

LP3852EMP-3.3/NOPB and LP3855EMP-3.3/NOPB are functionally identical to the main part with matching dropout voltage (0.44V) and quiescent current (3 mA). Both carry Active product status, ensuring long-term availability. LP3852EMP-3.3/NOPB is available in higher quantity (2200 Pcs) and represents the most direct replacement path.

Tier 2 - Electrical Equivalents with Acceptable Variations:

LP3872EMP-3.3/NOPB, LP3872EMPX-3.3/NOPB, LP3875EMP-3.3/NOPB, LP3962EMP-3.3/NOPB, and LP3965EMP-3.3/NOPB maintain identical output voltage and current specifications. These parts exhibit higher dropout voltage (0.55V vs. 0.44V) and increased quiescent current (5-9 mA vs. 3 mA). All carry Active product status. LP3872EMP-3.3/NOPB offers the largest inventory (55342 Pcs), providing supply security for high-volume applications.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and identical protection feature sets. REACH status varies between Affected and Unaffected; verify compliance requirements for your specific application region.

Packaging Considerations:

Cut Tape (CT) & Digi-Reel® packaging suits lower-volume or prototype applications. Tape & Reel (TR) packaging is optimized for automated assembly and high-volume production. Select packaging format based on manufacturing process requirements.

Frequently Asked Questions (FAQ)

Q: Can LP3872EMP-3.3/NOPB replace LP3852EMP-3.3 directly?

A: Yes. Both parts deliver 3.3V at 1.5A in SOT-223-5 package with identical protection features and operating temperature range. The LP3872EMP-3.3/NOPB exhibits 0.11V higher dropout voltage and 2-6 mA higher quiescent current. Substitution is valid when system design accommodates these electrical variations.

Q: What is the difference between LP3852EMP-3.3 and LP3852EMP-3.3/NOPB?

A: Both parts are electrically identical with matching specifications. The /NOPB suffix indicates lead-free (Pb-free) construction. The primary difference is packaging format: the main part uses Cut Tape & Digi-Reel®, while the /NOPB variant uses Tape & Reel (TR). The /NOPB version carries Active product status versus Last Time Buy for the main part.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 Compliant certification, meeting EU Directive 2011/65/EU requirements.

Q: Which substitute offers the best long-term availability?

A: LP3872EMP-3.3/NOPB carries Active product status with the highest inventory level (55342 Pcs), providing optimal supply continuity for ongoing production requirements.

Q: Can I use LP3962EMP-3.3 in new designs?

A: LP3962EMP-3.3 carries Last Time Buy status, indicating discontinued production. Use only for legacy system maintenance. For new designs, select from Active status parts: LP3852EMP-3.3/NOPB, LP3855EMP-3.3/NOPB, LP3872EMP-3.3/NOPB, LP3872EMPX-3.3/NOPB, LP3875EMP-3.3/NOPB, LP3962EMP-3.3/NOPB, or LP3965EMP-3.3/NOPB.

Q: What is the impact of higher quiescent current in LP3962 and LP3965 variants?

A: Quiescent current (9 mA vs. 3 mA in the main part) represents standby power consumption when the regulator is enabled but delivering minimal load current. Higher quiescent current increases idle power dissipation. Select lower quiescent variants (LP3852, LP3855) for battery-powered or low-power standby applications.

Q: Are there any REACH compliance differences between substitute parts?

A: Yes. LP3852EMP-3.3/NOPB, LP3855EMP-3.3/NOPB, LP3872EMP-3.3/NOPB, LP3872EMPX-3.3/NOPB, LP3875EMP-3.3/NOPB, LP3962EMP-3.3/NOPB, and LP3965EMP-3.3/NOPB carry REACH Unaffected status. The main part LP3852EMP-3.3 carries REACH Affected status. Verify regional compliance requirements before final part selection.

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