LP3962ET-3.3/LB05 Equivalent & Substitute Parts

Part Overview

The LP3962ET-3.3/LB05 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 1.5A in a TO-220-5 package. This part is classified as Last Time Buy, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

LP3962ET-3.3/LB05

Texas InstrumentsIn Stock: 911LP3962ET-3.3/LB05 Datasheet

Current PartRFQ

LP3962ET-3.3/NOPB

Texas InstrumentsIn Stock: 1196LP3962ET-3.3/NOPB Datasheet

DirectRFQ

LP3852ET-3.3/NOPB

National SemiconductorIn Stock: 1164LP3852ET-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3855ET-3.3/NOPB

Texas InstrumentsIn Stock: 839LP3855ET-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3875ET-3.3/NOPB

Texas InstrumentsIn Stock: 1241LP3875ET-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3965ET-3.3/NOPB

Texas InstrumentsIn Stock: 1158LP3965ET-3.3/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3962ET-3.3/LB05 are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalent: LP3962ET-3.3/NOPB shares identical electrical specifications with the main part, including output voltage, current rating, input voltage maximum, dropout voltage, quiescent current, and protection features. The primary difference is packaging designation (NOPB vs. LB05) and product status (Active vs. Last Time Buy).

Parametric Equivalents: LP3852ET-3.3/NOPB, LP3855ET-3.3/NOPB, LP3875ET-3.3/NOPB, and LP3965ET-3.3/NOPB maintain the core functional parameters: 3.3V fixed output, 1.5A output current, 7V maximum input voltage, TO-220-5 package, and identical protection and control features. These parts are interchangeable based on the following allowed parameters: output voltage, output current, input voltage rating, package type, mounting type, operating temperature range, and protection features.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: LP3962ET-3.3/NOPB is the direct equivalent with Active product status, ensuring long-term availability and supply chain continuity. This part maintains identical electrical performance and is the preferred choice for new designs and production transitions.

Secondary Selection: LP3855ET-3.3/NOPB and LP3852ET-3.3/NOPB offer improved performance characteristics with reduced dropout voltage (0.38V vs. 0.55V) and lower quiescent current (3 mA vs. 9 mA), beneficial for power-sensitive applications. Both maintain Active product status and full ROHS3 compliance.

Alternative Selection: LP3875ET-3.3/NOPB and LP3965ET-3.3/NOPB provide electrical equivalence with Active product status. LP3875ET-3.3/NOPB includes PSRR specification (73dB ~ 57dB at 120Hz), offering enhanced noise rejection for sensitive analog circuits.

All substitute parts maintain ROHS3 compliance and identical package geometry, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can LP3962ET-3.3/NOPB be used as a direct replacement for LP3962ET-3.3/LB05?

A: Yes. LP3962ET-3.3/NOPB is the direct manufacturer equivalent with identical electrical specifications, output voltage, current rating, dropout voltage, and protection features. The packaging designation difference (NOPB vs. LB05) does not affect electrical or mechanical compatibility. Both use TO-220-5 Formed Leads package.

Q: What are the key differences between LP3852ET-3.3/NOPB and the main part?

A: LP3852ET-3.3/NOPB maintains identical output voltage (3.3V), output current (1.5A), input voltage rating (7V max), and package type (TO-220-5). The differences are: lower dropout voltage (0.38V vs. 0.55V), lower quiescent current (3 mA vs. 9 mA), and lower supply current (10 mA vs. 15 mA). These improvements reduce power dissipation and heat generation.

Q: Are all substitute parts pin-compatible with the original LP3962ET-3.3/LB05?

A: Yes. All substitute parts use the TO-220-5 Formed Leads package with identical pin configuration and mechanical dimensions, ensuring direct PCB compatibility without layout changes.

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

A: LP3852ET-3.3/NOPB and LP3855ET-3.3/NOPB both feature reduced quiescent current (3 mA) and lower dropout voltage (0.38V), making them optimal for battery-powered or low-power designs where efficiency is critical.

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

A: Yes. All substitute parts are ROHS3 compliant and maintain identical operating temperature range (-40°C ~ 125°C), protection features (Over Current, Over Temperature, Short Circuit), and control features (Enable).

Q: What is the difference between LP3875ET-3.3/NOPB and LP3962ET-3.3/NOPB?

A: Both parts share identical output voltage, current rating, input voltage, and package specifications. LP3875ET-3.3/NOPB includes PSRR specification (73dB ~ 57dB at 120Hz) for improved power supply rejection ratio, beneficial for noise-sensitive analog circuits. Quiescent current is 5 mA compared to 9 mA in LP3962ET-3.3/NOPB.

Q: Can LP3965ET-3.3/NOPB be used in the same application as LP3962ET-3.3/LB05?

A: Yes. LP3965ET-3.3/NOPB maintains identical electrical specifications including output voltage (3.3V), output current (1.5A), input voltage (7V max), dropout voltage (0.55V), and package type (TO-220-5). Both parts are functionally equivalent for the same applications.