ST L4940XX5 L4940XX85 L4940XX10 L4940XX12 handbook

The L4940 series is a three-terminal positive regulator with precise 5V, 8.5V, 10V, and 12V outputs. It has very low dropout voltage and quiescent current, making it suitable for a wide range of industrial and consumer applications. These devices are particularly suitable for battery-powered equipment, reducing consumption and prolonging battery life. Each type has internal current limiting, antisaturation circuit, thermal shutdown, and safe area protection.


ST L4940XX5 L4940XX85 L4940XX10 L4940XX12 handbook - cover page
Brand
STMicroelectronics
Category
Other Electronics
Document type
Datasheet
Language
English
Pages
23
File format
PDF
File size
1.5 MB
Published
10 August, 2012
Updated
29 September, 2023
MD5 checksum
6FF22FFE8646D5806DAA30C2697DC862

About this manual

The L4940 series consists of three-terminal positive regulators available in TO-220, TO-220FP, and D?PAK packages. These devices feature precise fixed output voltages of 5V, 8.5V, 10V, and 12V, making them suitable for a wide range of industrial and consumer applications, particularly battery-powered equipment.

What's inside

  • Block diagram
  • Pin configuration
  • Maximum ratings
  • Test circuits
  • Electrical characteristics
  • Typical application
  • Schematic application
  • Package mechanical data

Specifications

Output current1.5 A
Output voltages5, 8.5, 10, 12 V
Dropout voltage450 mV typ. at 1 A
Operating junction temperature-40 to +150 °C
Forward input voltage30 V

Frequently asked questions

What are the available output voltages for the L4940 series?

The series is available with fixed output voltages of 5V, 8.5V, 10V, and 12V.

What is the maximum output current of the L4940 regulator?

The device is rated as a very low drop 1.5 A regulator.

Which packages are available for the L4940 series?

The devices are available in TO-220, TO-220FP, and D?PAK packages.

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