LP3962ESX-3.3 Equivalent & Substitute Parts

Part Overview

The LP3962ESX-3.3 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 TO-263 (DDPAK-5) surface mount package. The main part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. Substitute parts maintain identical electrical specifications and mechanical compatibility while offering active product status and improved availability.

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-263-6 (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

Substitute parts for the LP3962ESX-3.3 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Fixed 3.3V output voltage
1.5A output current capability
Maximum 7V input voltage rating
TO-263 (DDPAK-5) package compatibility
Surface mount mounting type
Operating temperature range of -40°C to 125°C
Enable control feature and comprehensive protection (Over Current, Over Temperature, Short Circuit)

Substitute parts are grouped into two categories based on voltage dropout characteristics:

Category A (0.38V Dropout): LP3852ESX-3.3/NOPB and LP3855ESX-3.3/NOPB offer reduced dropout voltage (0.38V @ 1.5A) with lower quiescent current (3 mA), providing improved efficiency in low-headroom applications.

Category B (0.55V Dropout): LP3872ESX-3.3/NOPB, LP3875ESX-3.3/NOPB, LP3962ESX-3.3/NOPB, and LP3965ESX-3.3/NOPB maintain the original 0.55V dropout specification, ensuring direct functional equivalence with the obsolete main part.

Parameter Comparison

Part Number	Manufacturer	Status	Dropout (Max)	Iq (mA)	PSRR	RoHS	Packaging
LP3962ESX-3.3	Texas Instruments	Obsolete	0.55V @ 1.5A	9	—	Non-compliant	Bulk
LP3852ESX-3.3/NOPB	Texas Instruments	Active	0.38V @ 1.5A	3	73dB ~ 57dB (120Hz)	ROHS3 Compliant	Tape & Reel (TR)
LP3855ESX-3.3/NOPB	National Semiconductor	Active	0.38V @ 1.5A	3	73dB ~ 57dB (120Hz)	—	Bulk
LP3872ESX-3.3/NOPB	Texas Instruments	Active	0.55V @ 1.5A	5	73dB ~ 57dB (120Hz)	ROHS3 Compliant	Tape & Reel (TR)
LP3875ESX-3.3/NOPB	National Semiconductor	Active	0.55V @ 1.5A	5	73dB ~ 57dB (120Hz)	—	Bulk
LP3962ESX-3.3/NOPB	Texas Instruments	Active	0.55V @ 1.5A	9	—	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
LP3965ESX-3.3/NOPB	National Semiconductor	Active	0.55V @ 1.5A	9	—	—	Bulk

Engineering Selection Recommendations

For direct replacement of the obsolete LP3962ESX-3.3, the LP3962ESX-3.3/NOPB is the primary equivalent. It maintains identical electrical specifications and is available in active product status with ROHS3 compliance.

For applications requiring improved efficiency, LP3852ESX-3.3/NOPB and LP3855ESX-3.3/NOPB offer reduced dropout voltage (0.38V) and lower quiescent current (3 mA), provided the application can accommodate these parameter differences. Both are active products with PSRR specification of 73dB ~ 57dB (120Hz).

LP3872ESX-3.3/NOPB and LP3875ESX-3.3/NOPB provide intermediate specifications with 0.55V dropout and 5 mA quiescent current, maintaining compatibility with the original part while offering active status and PSRR performance.

LP3965ESX-3.3/NOPB matches the original specifications exactly (0.55V dropout, 9 mA Iq) and is available in active status, though RoHS compliance status is not specified.

Selection should prioritize active product status and compliance certifications relevant to the end application. All substitute parts share identical package geometry (TO-263-6, DDPAK-5) and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can LP3852ESX-3.3/NOPB replace LP3962ESX-3.3 directly?

A: LP3852ESX-3.3/NOPB is electrically compatible but differs in dropout voltage (0.38V vs. 0.55V) and quiescent current (3 mA vs. 9 mA). Direct substitution is possible if the application can operate with lower dropout and reduced standby current. Package compatibility is identical (TO-263-6, DDPAK-5).

Q: What is the difference between bulk and tape & reel packaging?

A: Bulk packaging is supplied loose, while tape & reel (TR) and cut tape (CT) formats are supplied on carrier tape for automated assembly. All formats contain identical components; packaging selection depends on manufacturing process requirements and order quantities.

Q: Are all substitute parts RoHS compliant?

A: LP3852ESX-3.3/NOPB, LP3872ESX-3.3/NOPB, and LP3962ESX-3.3/NOPB are ROHS3 compliant. LP3855ESX-3.3/NOPB, LP3875ESX-3.3/NOPB, and LP3965ESX-3.3/NOPB do not specify RoHS status in available documentation.

Q: Does lower quiescent current affect circuit performance?

A: Lower quiescent current (3 mA in LP3852ESX-3.3/NOPB vs. 9 mA in LP3962ESX-3.3) reduces standby power consumption. This is beneficial in battery-powered or low-power applications and does not negatively affect output regulation or load response.

Q: Can I use LP3965ESX-3.3/NOPB as a direct replacement?

A: Yes. LP3965ESX-3.3/NOPB matches all electrical specifications of the obsolete LP3962ESX-3.3 (0.55V dropout, 9 mA Iq, 1.5A output) and is available in active product status with identical package geometry.

Q: What is PSRR and why does it matter?

A: Power Supply Rejection Ratio (PSRR) measures the regulator's ability to reject input voltage noise. LP3852ESX-3.3/NOPB, LP3855ESX-3.3/NOPB, LP3872ESX-3.3/NOPB, and LP3875ESX-3.3/NOPB specify 73dB ~ 57dB (120Hz), providing measurable noise rejection. The original LP3962ESX-3.3 does not specify PSRR.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message