LP3872EMPX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP3872EMPX-3.3/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 3.3V output at 1.5A in a SOT-223-5 surface mount package. The device is currently in Active product status with 2997 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design revisions call for components with equivalent electrical performance but different product lifecycle stages.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
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	SOT-223-5
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Electrical Parameters (Must Match):

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

Acceptable Variations:

Voltage dropout: May vary within the range 0.44V to 0.55V @ 1.5A
Quiescent current: May vary from 3 mA to 9 mA
Supply current maximum: May vary from 10 mA to 15 mA
Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
Product status: Active or Last Time Buy

All identified substitute parts meet these criteria and are interchangeable at the functional level for applications requiring a 3.3V, 1.5A linear regulator in SOT-223-5 packaging.

Parameter Comparison

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

Engineering Selection Recommendations

Primary Substitutes (Active Status, Highest Availability):

LP3872EMP-3.3/NOPB is the preferred substitute with 55342 units in stock and Active product status. This part maintains identical electrical specifications to the LP3872EMPX-3.3/NOPB, differing only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel).

LP3875EMP-3.3/NOPB and LP3855EMP-3.3/NOPB are functionally equivalent alternatives with Active status. LP3855EMP-3.3/NOPB offers improved quiescent current performance (3 mA versus 5 mA) and lower supply current (10 mA versus 15 mA), beneficial for battery-powered applications.

Secondary Substitutes (Active Status, Lower Quiescent Current):

LP3852EMP-3.3/NOPB provides the lowest quiescent current (3 mA) and supply current (10 mA) among all options, with Active product status and 2200 units available. This variant is suitable for power-sensitive designs.

Alternatives with Caution (Last Time Buy Status):

LP3852EMP-3.3 and LP3962EMP-3.3 carry Last Time Buy status, indicating limited future availability. These should be selected only when specific packaging requirements (Cut Tape & Digi-Reel® or Tape & Reel) cannot be met by Active alternatives.

Compliance Considerations:

All substitute parts are ROHS3 Compliant and carry identical ECCN (EAR99) and HTSUS classifications. REACH status varies: LP3852EMP-3.3 is REACH Affected, while all other substitutes are REACH Unaffected. Verify REACH compliance requirements for your application before selection.

Frequently Asked Questions (FAQ)

Q: Can LP3852EMP-3.3/NOPB replace LP3872EMPX-3.3/NOPB directly?

A: Yes. Both parts deliver 3.3V at 1.5A in SOT-223-5 packaging with identical operating temperature range and protection features. LP3852EMP-3.3/NOPB has lower quiescent current (3 mA vs. 5 mA) and lower supply current (10 mA vs. 15 mA), making it suitable for all applications where the original part was used.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?

A: Both are surface mount packaging formats for automated assembly. Tape & Reel (TR) is supplied on continuous tape in reel format. Cut Tape (CT) & Digi-Reel® is supplied on cut tape segments. Selection depends on your manufacturing equipment and volume requirements. Electrical performance is identical.

Q: Why do some parts have higher quiescent current?

A: Quiescent current (Iq) represents the regulator's internal power consumption when delivering no load current. LP3962EMP-3.3 and LP3965EMP-3.3/NOPB have 9 mA Iq compared to 3-5 mA in other variants. This affects total system power consumption in standby or low-load conditions but does not impact output voltage or current delivery capability.

Q: Are Last Time Buy parts suitable for new designs?

A: Last Time Buy status indicates the manufacturer will not produce additional quantities beyond current inventory. These parts are suitable for production use but not recommended for new product designs requiring long-term component availability. Prioritize Active status parts for new designs.

Q: What does REACH Affected status mean for LP3852EMP-3.3?

A: REACH Affected indicates the part contains substances subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations. Verify your application's regulatory requirements. All other substitutes are REACH Unaffected.

Q: Can I use LP3875EMP-3.3/NOPB in place of LP3855EMP-3.3/NOPB?

A: Yes. Both parts are electrically identical with 3.3V output, 1.5A current, 0.44V dropout, and 3 mA quiescent current. The only difference is the base product number (LP3875 vs. LP3855), which reflects internal design variations that do not affect functional performance or pin compatibility in SOT-223-5 packaging.

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