LP3964ET-5.0 Equivalent & Substitute Parts

Part Overview

The LP3964ET-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 800mA current capacity in a TO-220-5 package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity. The LP3964ET-5.0 provides regulated 5V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for through-hole mounting applications requiring fixed positive voltage regulation.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP3964ET-5.0
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	TO-220-5 Formed Leads
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Voltage - Input (Max)	7V
Current - Output	800mA
Voltage Dropout (Max)	0.35V @ 800mA
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the LP3964ET-5.0 is determined by the following critical parameters:

Output voltage specification: 5V fixed positive output
Package compatibility: TO-220-5 Formed Leads for through-hole mounting
Output current capacity: minimum 800mA
Input voltage range: maximum 7V
Operating temperature range: -40°C ~ 125°C
Protection features: Over-current, over-temperature, and short-circuit protection
Control features: Enable function
Regulatory compliance: ROHS3 Compliant

The LP3852ET-5.0/NOPB qualifies as a direct substitute based on matching all critical parameters while offering enhanced specifications in output current capacity and quiescent current performance.

Parameter Comparison

Parameter	LP3964ET-5.0	LP3852ET-5.0/NOPB	Compatibility
Manufacturer	Texas Instruments	Texas Instruments	Match
Package / Case	TO-220-5 Formed Leads	TO-220-5 Formed Leads	Match
Output Configuration	Positive	Positive	Match
Output Type	Fixed	Fixed	Match
Voltage - Output (Min/Fixed)	5V	5V	Match
Voltage - Input (Max)	7V	7V	Match
Current - Output	800mA	1.5A	Compatible (higher capacity)
Voltage Dropout (Max)	0.35V @ 800mA	0.38V @ 1.5A	Compatible
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	Match
Mounting Type	Through Hole	Through Hole	Match
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Match
Control Features	Enable	Enable	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Product Status	Obsolete	Active	Upgrade available

Engineering Selection Recommendations

The LP3852ET-5.0/NOPB is the qualified substitute for the obsolete LP3964ET-5.0. Both devices are manufactured by Texas Instruments and maintain identical electrical specifications for output voltage, input voltage range, operating temperature, and protection architecture. The LP3852ET-5.0/NOPB is currently in active production status, ensuring long-term availability and supply chain continuity.

The LP3852ET-5.0/NOPB provides enhanced output current capacity at 1.5A compared to the 800mA specification of the LP3964ET-5.0, making it suitable for applications requiring the original 800mA specification with additional design margin. Both devices are ROHS3 compliant and maintain identical TO-220-5 package geometry for direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LP3852ET-5.0/NOPB directly replace the LP3964ET-5.0 in existing designs?

A: Yes. Both devices share identical output voltage (5V), input voltage range (7V maximum), operating temperature range (-40°C ~ 125°C), package geometry (TO-220-5 Formed Leads), and protection features. The LP3852ET-5.0/NOPB provides higher output current capacity (1.5A versus 800mA), making it a direct pin-compatible substitute with enhanced performance margin.

Q: What are the key differences between these two regulators?

A: The primary differences are output current capacity (LP3852ET-5.0/NOPB: 1.5A versus LP3964ET-5.0: 800mA), quiescent current (LP3852ET-5.0/NOPB: 3mA versus LP3964ET-5.0: 9mA), and product status (LP3852ET-5.0/NOPB is active; LP3964ET-5.0 is obsolete). Voltage dropout specifications are comparable at their respective rated currents.

Q: Are there any thermal or mounting considerations when substituting these parts?

A: Both devices use identical TO-220-5 through-hole package geometry with formed leads. Thermal management requirements may differ due to the higher current capacity of the LP3852ET-5.0/NOPB; however, for applications originally designed for 800mA operation, thermal performance will be equivalent or improved.

Q: What compliance certifications apply to both parts?

A: Both the LP3964ET-5.0 and LP3852ET-5.0/NOPB are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001. Moisture sensitivity level is 1 (unlimited) for both devices.

Q: Is the LP3852ET-5.0/NOPB available in the same packaging format?

A: The LP3852ET-5.0/NOPB is supplied in tube packaging, while the LP3964ET-5.0 packaging format was not specified. Both devices use identical TO-220-5 Formed Leads package / case specification suitable for through-hole PCB assembly.

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