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LM2940S-3.3 AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

LM2940S-3.3 product

LM2940S-3.3

Amplifiers

LDOLinear Regulator3.3VAutomotive

The LM2940S-3.3 is a fixed 3.3V, 1A low dropout (LDO) linear regulator in a SOT-223-3L package, ideal for automotive and battery-powered systems requiring robust protection features.

Best for

  • Automotive electronics
  • Battery-powered systems
  • Linear power supplies

Avoid if

  • Applications requiring very low quiescent current (use specialized ultra-low IQ LDOs instead)
  • High-power applications without adequate thermal dissipation

Check before use

  • Thermal resistance of the PCB layout
  • Input/output capacitor requirements

Key specifications

Output Voltage
3.3 V
Max Output Current
1 A
Dropout Voltage
400 mV
Package
SOT-223-3L

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

AutomotivePower Supplies

Datasheet

4acb5b1b75dabbce144f47578034e8c8_2006081112_HTC-Korea-TAEJIN-Tech-LM2940S-3-3_C596335.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for LM2940S-3.3: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
Schematic symbol for your EDA tool
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
Verified KiCad 8 symbol, footprint, and 3D model
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Where to Buy

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

The LM2940S-3.3 is a 1A low dropout (LDO) linear voltage regulator that provides a fixed 3.3V output. It is designed for high-efficiency applications and includes built-in protection against reverse battery, over-temperature, and over-current conditions.