LM2576T-12

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LM2576T-12

IC REG BUCK 12V 3A TO220-5

  • Fabricant
  • Mfr. Partie #LM2576T-12
  • Paquet TO-220 (KC)-5
  • Fiche de données
  • En stock5338

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Spécifications

Package Tube
Series SIMPLE SWITCHER®
ProductStatus Not For New Designs
Function Step-Down
OutputConfiguration Positive
Topology Buck
OutputType Fixed
NumberofOutputs 1
Voltage-Input(Min) 4V
Voltage-Input(Max) 40V
Voltage-Output(Min/Fixed) 12V
Current-Output 3A
Frequency-Switching 52kHz
SynchronousRectifier No
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Through Hole
Package/Case TO-220-5

Vue d'ensemble

Description

The LM2576T-12 is a monolithic integrated circuit that functions as a step-down (buck) voltage regulator. It is designed to efficiently convert a higher input voltage (up to 40V) into a stable lower output voltage of 12V, with an output current capability of up to 3A. This device is part of the LM2576 series, which is known for its ease of use and efficient performance, featuring a fixed output voltage variant (12V in this case) and adjustable variants.
Key features of the LM2576T-12 include a high efficiency rating (up to 88%), minimal external components required, and a wide input voltage range. The regulator also offers features like thermal shutdown, current limit protection, and an on/off control for enhanced safety and functionality. Operating at a fixed frequency of 52 kHz, it is ideal for applications requiring simple, efficient, and cost-effective power supply solutions, such as in battery chargers, distributed power systems, and industrial power supplies. Its TO-220 package format allows for easy mounting and heat dissipation.

Features

The LM2576T-12 is a step-down voltage regulator designed for efficient power management in various applications. Key features include:
1. Output Voltage: Provides a fixed output voltage of 12V.
2. Efficiency: Offers high efficiency, typically around 80-90%, minimizing heat generation.
3. Output Current: Can deliver up to 3A of continuous load current.
4. Wide Input Voltage Range: Operates with an input voltage range of 4V to 40V, making it versatile for different power sources.
5. Switching Frequency: Fixed frequency operation at 52 kHz for predictable performance.
6. Thermal Protection: Includes thermal shutdown for protecting the device from overheating.
7. Current Limiting: Features internal current limit protection to prevent overcurrent conditions.
8. Ease of Use: Requires a minimal number of external components, simplifying circuit design.
9. Low External Component Count: Simplifies the overall design with fewer required parts.
10. Package: Available in a TO-220 package for effective heat dissipation.
The LM2576T-12 is ideal for applications like battery chargers, distributed power systems, and general-purpose power supplies, offering reliable performance with minimal design complexity.

Package

The LM2576T-12 is a step-down voltage regulator with a TO-220 package type. The "T" in the part number indicates this package. It is designed for ease of use and efficient performance, suitable for a variety of power supply applications.

Pinout

The LM2576T-12 is a step-down voltage regulator with a fixed output voltage of 12V. It comes in a TO-220 package and has 5 pins. Here is a brief description of the pin functions:
1. Pin 1 (VIN): Input voltage pin, where the input DC voltage is connected. It can accept a wide range of input voltages, typically from 4V to 40V.
2. Pin 2 (OUTPUT): This is the output pin, where the regulated 12V output is obtained.
3. Pin 3 (GROUND): This is the ground pin, which is the reference point for the circuit.
4. Pin 4 (FEEDBACK): This pin is used to set the output voltage and is typically connected to the output in fixed voltage versions like the LM2576T-12.
5. Pin 5 (ON/OFF): An optional pin to enable or disable the regulator. If this pin is left open or connected to a high level, the regulator is enabled. Pulling this pin low will turn off the regulator.
The LM2576T-12 is commonly used for efficient DC-DC conversion in power supply designs, delivering up to 3A of output current.

Manufacturer

The LM2576T-12 is manufactured by Texas Instruments, a major American technology company. Texas Instruments (TI) specializes in designing and manufacturing semiconductors, which are integral components in electronics. Founded in 1930 and headquartered in Dallas, Texas, TI's extensive product range includes analog chips and embedded processors, serving industries such as automotive, industrial, personal electronics, and communications. The LM2576T-12 is a popular voltage regulator integrated circuit used for step-down (buck) voltage regulation applications, reflecting TI's focus on providing reliable and efficient electronic components.

Application

The LM2576T-12 is a voltage regulator commonly used in applications requiring step-down (buck) voltage conversion. It is suitable for power supply solutions in consumer electronics, industrial automation, and automotive systems. This regulator is ideal for battery-powered devices, telecommunications equipment, and general-purpose electronic projects needing a stable 12V output with high efficiency and minimal external components. Its reliability and simplicity make it popular for designing efficient power management systems.

Equivalent

The LM2576T-12 is a step-down voltage regulator. Equivalent products include:
1. LM2596-12: Similar functionality with slightly better performance.
2. L4973V12: Offers a fixed 12V output with similar characteristics.
3. MC34063: Requires external components for 12V, but is a versatile DC-DC converter.
4. RECOM R-78xx series: Compact drop-in replacement for 78xx linear regulators.
Always check datasheets for differences in pin configuration and specifications.

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