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L4940V12 The STMicroelectronics L4940V12 is a 12V, 1.5A linear voltage regulator designed for industrial and consumer applications. It features a low dropout voltage and protection against thermal shutdown and short circuits.
Mfr Part #:

L4940V12

Available from 2 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics L4940V12 is a 12V, 1.5A linear voltage regulator designed for industrial and consumer applications. It features a low dropout voltage and protection against thermal shutdown and short circuits.
✓ Total Stock: 1,780 pcs
$ Price Range: $0.28

L4940V12 Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
1,755 pcs
On Request
1755 pcs On Request 1 On Request On Request 05+ On Request On Request
Partservice ✓
Non-Authorised Inventory information
25 pcs
On Request
25 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

L4940V12 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Input Voltage
Lead Style
Mounting Type
Number of Regulators
Operating Temperature
Output Configuration
Output Current
Output Type
PSRR
Protection Features
Storage Temperature
Supplier Device Package
Supplier Package
Voltage
Voltage Dropout (Max)
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L4940V12 Description

Short technical summary and product information.

The STMicroelectronics L4940V12 is a versatile linear voltage regulator offering a precise 12V output with a maximum current capability of 1.5A. Its design prioritizes efficiency in battery-powered applications due to a very low dropout voltage, specified typically at 450mV at 1A.

 

Key features include internal current limiting, anti-saturation circuitry, thermal shutdown, and reverse polarity protection, ensuring robust operation and device longevity. The regulator operates across a wide temperature range from -40°C to 150°C and is housed in a standard TO-220-3 package suitable for through-hole mounting.

 

With a PSRR of 61dB at 120Hz, the L4940V12 effectively filters out noise from the input supply, making it suitable for various industrial and consumer electronics where stable voltage regulation is critical. Its fixed output configuration simplifies circuit design.

L4940V12 Quick Information

Product Type: Linear Voltage Regulator
Series: L4940xx
Canonical Name: L4940V12 12V 1.5A Linear Voltage Regulator
Subcategory: Linear

L4940V12 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

L4940V12 Estimated Pricing

Qty Low High
1+ $0.28 $0.28

Estimated market price range - modelled values for guidance only, not live distributor offers.

L4940V12 Features

  • Provides a precise 12V output voltage.
  • Delivers up to 1.5A output current.
  • Features low dropout voltage for efficiency.
  • Includes thermal shutdown and short circuit protection.
  • Housed in a TO-220 package for through-hole mounting.

L4940V12 Applications

  • Suitable for battery-powered equipment.
  • Ideal for industrial applications.
  • Useful in consumer electronics.
  • Provides stable voltage regulation.
  • Filters input power supply noise.

L4940V12 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the output voltage of the L4940V12?

The L4940V12 has a fixed output voltage of 12V.

What is the maximum output current of the L4940V12?

The maximum output current is 1.5A.

What is the dropout voltage of the L4940V12?

The typical dropout voltage is 450mV at 1A, with a maximum of 0.9V at 1.5A.

What is the operating temperature range of the L4940V12?

The operating junction temperature range is -40°C to +150°C.

What package is the L4940V12 available in?

The L4940V12 is available in a TO-220-3 through-hole package.

What is the maximum input voltage for the L4940V12?

The maximum input voltage is 30V.

What is the PSRR of the L4940V12?

The typical PSRR is 61dB at 120Hz.

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