LP3962ES-3.3/1 Equivalent & Substitute Parts

Part Overview

The LP3962ES-3.3/1 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device provides integrated protection features including over-current, over-temperature, and short-circuit protection with an enable control function.

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)	9 mA
Package Type	TO-263 (DDPAK-5)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the LP3962ES-3.3/1 is determined by strict equivalence across the following critical parameters:

Fixed output voltage of 3.3V
Output current capability of 1.5A
Maximum input voltage of 7V
TO-263 (DDPAK-5) package compatibility
Operating temperature range of -40°C to 125°C
Identical protection features (over-current, over-temperature, short-circuit)
Enable control function

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in quiescent current, voltage dropout, and PSRR performance do not affect functional substitutability within the defined parameter envelope. Product status and RoHS compliance differ among alternatives and should be evaluated based on application requirements and supply chain constraints.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Voltage Dropout @ 1.5A	Quiescent Current	Product Status	RoHS Status	Inventory
LP3962ES-3.3/1	Texas Instruments	3.3V	1.5A	0.55V	9 mA	Obsolete	Non-compliant	1090 Pcs
LP3852ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.38V	3 mA	Active	ROHS3 Compliant	2000 Pcs
LP3855ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.38V	3 mA	Active	ROHS3 Compliant	1570 Pcs
LP3872ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V	5 mA	Active	ROHS3 Compliant	1831 Pcs
LP3875ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V	5 mA	Active	ROHS3 Compliant	3270 Pcs
LP3965ES-3.3	Texas Instruments	3.3V	1.5A	0.55V	9 mA	Last Time Buy	ROHS3 Compliant	1120 Pcs
LP3965ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V	9 mA	Active	ROHS3 Compliant	1138 Pcs
LP3852ES-3.3	Texas Instruments	3.3V	1.5A	0.38V	3 mA	Last Time Buy	ROHS3 Compliant	1440 Pcs
LP3962ES-3.3/NOPB	Texas Instruments	3.3V	1.5A	0.55V	9 mA	Active	ROHS3 Compliant	1105 Pcs

Engineering Selection Recommendations

For applications requiring immediate substitution of the obsolete LP3962ES-3.3/1, the following selection criteria apply:

Active Status Priority: LP3962ES-3.3/NOPB, LP3852ES-3.3/NOPB, LP3855ES-3.3/NOPB, LP3872ES-3.3/NOPB, LP3875ES-3.3/NOPB, and LP3965ES-3.3/NOPB are all in active production status and represent the most reliable long-term supply options.

RoHS Compliance: All substitute parts except the main part are ROHS3 compliant, meeting modern regulatory requirements for new designs and manufacturing environments.

Performance Characteristics: LP3852ES-3.3/NOPB and LP3855ES-3.3/NOPB offer improved voltage dropout performance (0.38V versus 0.55V) and lower quiescent current (3 mA versus 9 mA), resulting in reduced power dissipation and improved efficiency in battery-powered or thermally constrained applications.

Inventory Availability: LP3875ES-3.3/NOPB provides the highest current inventory (3270 Pcs), followed by LP3852ES-3.3/NOPB (2000 Pcs), supporting volume production requirements.

Last Time Buy Consideration: LP3965ES-3.3 and LP3852ES-3.3 are designated Last Time Buy and should be avoided for new designs requiring extended production lifecycles.

Frequently Asked Questions (FAQ)

Q: Can LP3852ES-3.3/NOPB directly replace LP3962ES-3.3/1 without circuit modifications?

A: Yes. Both parts maintain identical output voltage (3.3V), output current (1.5A), input voltage rating (7V maximum), operating temperature range (-40°C to 125°C), and TO-263 package footprint. The lower voltage dropout and quiescent current of the LP3852ES-3.3/NOPB represent performance improvements with no negative impact on circuit compatibility.

Q: What is the difference between LP3965ES-3.3 and LP3965ES-3.3/NOPB?

A: Both parts are electrically identical with matching output voltage, current, dropout, and quiescent current specifications. The /NOPB suffix indicates lead-free plating compliance. LP3965ES-3.3/NOPB is in active production status, while LP3965ES-3.3 is designated Last Time Buy.

Q: Are all substitute parts available in the same TO-263 (DDPAK-5) package?

A: Yes. All listed substitute parts use the TO-263-6 package designation with D2PAK (5 Leads + Tab) configuration, ensuring mechanical and thermal compatibility with existing PCB layouts.

Q: Which substitute part offers the best efficiency for low-power applications?

A: LP3852ES-3.3/NOPB and LP3855ES-3.3/NOPB both feature the lowest quiescent current (3 mA) and lowest voltage dropout (0.38V @ 1.5A), minimizing standby power consumption and heat generation in applications with variable load conditions.

Q: Can I use LP3872ES-3.3/NOPB or LP3875ES-3.3/NOPB as alternatives?

A: Yes. Both parts are functionally equivalent with identical output specifications and active production status. They feature slightly higher quiescent current (5 mA) and voltage dropout (0.55V) compared to the LP3852/LP3855 series but remain fully compatible with the original LP3962ES-3.3/1 design envelope.

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