L4941   Product is in volume production.

Very low drop 1A regulator

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The L4941 is a three terminal 5V positive regulators available in TO-220 and DPAK packages, making it useful in a wide range of industrial and consumer applications. Thanks to its very low input/output voltage drop, these devices are particularly suitable for battery powered equipments, reducing consumption and prolonging battery life. It employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection.

Key Features

  • Low dropout voltage (450mV typ. at 1A)
  • Thermal shutdown
  • Very low quiescent current
  • Reverse polarity protection
  • Short circuit protection

Circuit Diagram

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Resources

Technical Documentation

Product Specifications
Description Version Size
DS0421 DS0421: Very low drop 1A regulator 5.3 956 KB

Publications and Collaterals

Selection Guides
Description Version Size
Linear and Switching Voltage Regulators Selection Guide 3.0 370 KB
Brochures
Description Version Size
Brochure Power management guide 10.2018 4 MB
Low-dropout (LDO) linear voltage regulators - Quick Reference Guide 2.0 216 KB
Power management for handheld and portable 2.0 1 MB
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Sample & Buy

Part Number Package Packing Type Output Voltage (V) (nom) Output Tolerance (typ) Output Current (A) (nom) Marketing Status Unit Price (US$) * Quantity ECCN (US) Country of Origin More info Order from ST Order from Distributors
L4941BV TO-220 Tube 5 4 1 Active 0.406 1000 EAR99 CHINA MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
L4941BDT-TR DPAK Tape And Reel 5 4 1 Active 0.568 1000 EAR99 CHINA MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4941BV ActiveTO-220IndustrialEcopack1 0 0
L4941BDT-TR ActiveDPAKIndustrialEcopack2 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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