LP3965EMP-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3965EMP-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 1.5A output current in a compact SOT-223-5 package and operates across an industrial temperature range of -40°C to 125°C. The main part is currently in Last Time Buy status, making identification of equivalent substitute parts essential for design continuity and procurement planning. Substitute parts with identical electrical and mechanical specifications ensure seamless integration into existing designs without circuit modification.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Current - Output	1.5A
Voltage - Input (Max)	7V
Voltage - Output (Min/Fixed)	1.216V
Voltage - Output (Max)	5.1V
Voltage Dropout (Max)	0.55V @ 1.5A
Operating Temperature	-40°C to 125°C
Package / Case	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3965EMP-ADJ are determined by strict equivalence across all electrical performance parameters and mechanical specifications. The substitution criteria are based on the following key parameters:

Output current capability (1.5A)
Adjustable output voltage range (1.216V to 5.1V)
Maximum input voltage (7V)
Dropout voltage performance (0.55V @ 1.5A)
Quiescent current (9 mA)
Protection features (Over Current, Over Temperature, Short Circuit)
Control features (Enable function)
Package type (SOT-223-5)
Surface Mount mounting configuration
Operating temperature range (-40°C to 125°C)
Compliance certifications (ROHS3, REACH Unaffected)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. Packaging format variations (Cut Tape vs. Tape & Reel) do not affect electrical compatibility.

Parameter Comparison

Parameter	LP3965EMP-ADJ	LP3965EMP-ADJ/NOPB	LP3965EMPX-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Last Time Buy	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Current - Output	1.5A	1.5A	1.5A
Voltage - Input (Max)	7V	7V	7V
Voltage - Output (Min/Fixed)	1.216V	1.216V	1.216V
Voltage - Output (Max)	5.1V	5.1V	5.1V
Voltage Dropout (Max)	0.55V @ 1.5A	0.55V @ 1.5A	0.55V @ 1.5A
Current - Quiescent (Iq)	9 mA	9 mA	9 mA
Current - Supply (Max)	15 mA	15 mA	15 mA
PSRR	60dB ~ 40dB (120Hz)	60dB ~ 40dB (120Hz)	60dB ~ 40dB (120Hz)
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-261-5, TO-261AB	TO-261-5, TO-261AB	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5	SOT-223-5	SOT-223-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both LP3965EMP-ADJ/NOPB and LP3965EMPX-ADJ/NOPB are direct parametric equivalents to the LP3965EMP-ADJ and are suitable for substitution in all applications requiring identical electrical and mechanical performance.

LP3965EMP-ADJ/NOPB is recommended as the primary substitute due to its Active product status and higher available inventory (5294 pcs). This part maintains identical packaging format options (Cut Tape & Digi-Reel) to the original part, ensuring compatibility with existing procurement and assembly processes.

LP3965EMPX-ADJ/NOPB is an alternative substitute also in Active status with substantial inventory availability (4400 pcs). This variant is supplied in Tape & Reel format, which may be preferred for high-volume automated assembly operations. All electrical specifications and performance characteristics remain identical to the main part.

Both substitute parts carry ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements equivalent to the original LP3965EMP-ADJ. Selection between these substitutes should be based on packaging format requirements and procurement lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can LP3965EMP-ADJ/NOPB be used as a direct replacement for LP3965EMP-ADJ?

A: Yes. LP3965EMP-ADJ/NOPB is a parametric equivalent with identical electrical specifications, output current rating, voltage range, dropout performance, protection features, and package configuration. No circuit modifications are required.

Q: What is the difference between LP3965EMP-ADJ/NOPB and LP3965EMPX-ADJ/NOPB?

A: Both parts are parametric equivalents with identical electrical performance. The primary difference is packaging format: LP3965EMP-ADJ/NOPB is available in Cut Tape and Digi-Reel formats, while LP3965EMPX-ADJ/NOPB is supplied in Tape & Reel format. This distinction affects procurement and assembly handling but does not impact electrical compatibility.

Q: Are the substitute parts compatible with the SOT-223-5 footprint?

A: Yes. All substitute parts use the SOT-223-5 package with TO-261-5 and TO-261AB case designations, ensuring PCB footprint compatibility with designs using the original LP3965EMP-ADJ.

Q: Do the substitute parts meet the same compliance standards as the original part?

A: Yes. Both LP3965EMP-ADJ/NOPB and LP3965EMPX-ADJ/NOPB are ROHS3 compliant and REACH Unaffected, matching the regulatory status of the original LP3965EMP-ADJ.

Q: Which substitute part should be selected for high-volume production?

A: LP3965EMPX-ADJ/NOPB in Tape & Reel format is optimized for high-volume automated assembly. LP3965EMP-ADJ/NOPB is suitable for both standard and high-volume applications depending on packaging preference.

Q: Is there any difference in operating temperature range between the parts?

A: No. All parts operate across the identical temperature range of -40°C to 125°C, ensuring consistent performance across industrial applications.

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