LP3965ES-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP3965ES-5.0/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 5V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. The device includes enable control, over-current protection, over-temperature protection, and short-circuit protection, with an operating temperature range of -40°C to 125°C.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this regulator.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP3965ES-5.0/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	5V
Current - Output	1.5A
Voltage - Input (Max)	7V
Voltage Dropout (Max)	0.55V @ 1.5A
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3965ES-5.0/NOPB are identified based on the following critical parameters that determine functional compatibility:

Fixed 5V positive output voltage
1.5A output current capability
TO-263 (DDPAK-5) surface mount package
Enable control feature
Over-current, over-temperature, and short-circuit protection
Operating temperature range of -40°C to 125°C
ROHS3 compliance and identical moisture sensitivity level (MSL 3)

The substitute parts are grouped into two categories: Texas Instruments parametric equivalents (LP3852ES-5.0/NOPB, LP3855ES-5.0/NOPB, LP3872ES-5.0/NOPB) with active product status, and a manufacturer-recommended alternative from Microchip Technology (MIC29151-5.0WU) with extended input voltage capability.

Parameter Comparison

Parameter	LP3965ES-5.0/NOPB	LP3852ES-5.0/NOPB	LP3855ES-5.0/NOPB	LP3872ES-5.0/NOPB	MIC29151-5.0WU
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Microchip Technology
Product Status	Obsolete	Active	Active	Active	Active
Output Voltage (Fixed)	5V	5V	5V	5V	5V
Output Current	1.5A	1.5A	1.5A	1.5A	1.5A
Voltage - Input (Max)	7V	7V	7V	7V	26V
Voltage Dropout (Max)	0.55V @ 1.5A	0.38V @ 1.5A	0.38V @ 1.5A	0.55V @ 1.5A	0.6V @ 1.5A
Current - Quiescent (Iq)	9 mA	3 mA	3 mA	5 mA	Not specified
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity, Transient Voltage
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

All substitute parts maintain identical functional specifications for fixed 5V output, 1.5A current delivery, and TO-263 package compatibility. Selection among active alternatives should be based on the following criteria:

Texas Instruments LP3852ES-5.0/NOPB and LP3855ES-5.0/NOPB: These parts offer improved dropout voltage performance (0.38V versus 0.55V) and reduced quiescent current (3 mA versus 9 mA), resulting in lower power dissipation and improved efficiency in applications with tight input voltage margins. Both parts maintain active product status and full ROHS3 compliance.

Texas Instruments LP3872ES-5.0/NOPB: This part matches the original LP3965ES-5.0/NOPB dropout voltage specification (0.55V) and maintains active product status. It provides a direct functional equivalent with improved quiescent current performance (5 mA versus 9 mA).

Microchip Technology MIC29151-5.0WU: This part extends maximum input voltage capability to 26V, compared to 7V for Texas Instruments alternatives. It includes additional protection features (reverse polarity and transient voltage protection) and maintains active product status. This option is suitable for applications requiring higher input voltage tolerance or enhanced protection capabilities.

All substitute parts are ROHS3 compliant with identical MSL ratings and operating temperature ranges, ensuring compatibility with existing manufacturing and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can LP3852ES-5.0/NOPB or LP3855ES-5.0/NOPB be used as direct replacements for LP3965ES-5.0/NOPB?

A: Yes. Both parts deliver identical 5V fixed output at 1.5A in the same TO-263 package. They share the same operating temperature range, protection features, and compliance certifications. The primary differences are improved dropout voltage (0.38V versus 0.55V) and reduced quiescent current (3 mA versus 9 mA), which provide performance benefits in most applications.

Q: What is the advantage of LP3872ES-5.0/NOPB over LP3852ES-5.0/NOPB?

A: LP3872ES-5.0/NOPB matches the original dropout voltage specification (0.55V) while offering lower quiescent current (5 mA versus 3 mA). Selection depends on whether the application prioritizes dropout voltage matching or quiescent current minimization.

Q: When should MIC29151-5.0WU be selected instead of Texas Instruments alternatives?

A: MIC29151-5.0WU is appropriate for applications with input voltages exceeding 7V, up to 26V maximum. It also provides reverse polarity and transient voltage protection features not present in Texas Instruments alternatives. All other electrical and package specifications remain compatible.

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

A: Yes. All substitute parts use TO-263-6 (D2PAK with 5 Leads + Tab) surface mount packaging, ensuring identical PCB layout and assembly compatibility.

Q: Do substitute parts maintain the same moisture sensitivity level?

A: Yes. All substitute parts carry MSL 3 (168 Hours) rating, identical to the original LP3965ES-5.0/NOPB, ensuring equivalent handling and storage requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts maintain ROHS3 compliance and are REACH unaffected, matching the environmental and regulatory compliance of the original part.

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