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LM2576T-3.3

Name: LM2576T-3.3
Rating: 4.7 (12 reviews)

IC REG BUCK 3.3V 3A TO220-5

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Mfr。パート #LM2576T-3.3
パッケージ
データシート
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仕様

Part Status	Obsolete
Function	Step-Down
Output Configuration	Positive
Topology	Buck
Output Type	Fixed
Number of Outputs	1
Voltage - Input (Min)	4V
Voltage - Input (Max)	40V
Voltage - Output (Min/Fixed)	3.3V
Current - Output	3A
Frequency - Switching	52kHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-5
Supplier Device Package	TO-220-5
Base Product Number	LM2576

概要

Description

The LM2576T-3.3 is a step-down (buck) voltage regulator designed to provide a stable output of 3.3V with a maximum current output of 3A. It is part of the LM2576 series, which is widely used for power management in various electronic applications. This regulator features a wide input voltage range of 4V to 40V, making it versatile for different power supply sources.
Key features include high efficiency, typically around 75% to 90%, which helps in thermal management and prolongs battery life in portable applications. The LM2576T-3.3 includes built-in thermal overload protection and current limiting, enhancing reliability during operation.
The device is available in a TO-220 package, allowing for easy heat dissipation, and supports external components for customization, such as inductors and capacitors, to optimize performance based on specific requirements. It is ideal for applications like power supplies for microcontrollers, sensors, and other electronic devices requiring a stable and efficient voltage source.

Features

The LM2576T-3.3 is a step-down (buck) voltage regulator with specific features:
1. Output Voltage: Fixed output voltage of 3.3V.
2. Input Voltage Range: Operates from 4.5V to 40V.
3. Output Current: Capable of delivering up to 3A of continuous output current.
4. Efficiency: High efficiency, typically up to 75-90%, reducing heat generation.
5. Thermal Shutdown: Includes built-in thermal protection to prevent overheating.
6. Short-Circuit Protection: Provides protection against short-circuit conditions.
7. Adjustable Switching Frequency: Operates with a frequency of 52 kHz, allowing for smaller inductors and capacitors.
8. Pin-to-Pin Replacement: Compatible with LM2575 and LM2596, facilitating easy upgrades.
9. Easy to Use: Minimal external components required for operation, simplifying circuit design.
These features make the LM2576T-3.3 suitable for a variety of applications, including power supplies for microcontrollers, sensors, and portable devices.

Package

The LM2576T-3.3 is typically available in a TO-263 package type. This surface-mounted package features a thermal pad for enhanced heat dissipation and is designed for efficient power management applications.

Pinout

The LM2576T-3.3 is a voltage regulator with a pin count of 5. It is designed to provide a fixed output voltage of 3.3V from a higher input voltage. The pin functions are as follows:
1. Input (Vin): This pin connects to the input voltage source.
2. Output (Vout): This pin provides the regulated 3.3V output.
3. Ground (GND): This pin connects to the system ground.
4. Feedback (VFB): This pin is used to set the output voltage and connect to an external resistor divider in adjustable versions; for fixed versions like the LM2576T-3.3, it's internally connected.
5. Switch (SW): This pin is connected to the internal switching transistor and provides the output current.
The LM2576 series is known for its ease of use, high efficiency, and ability to handle loads up to 3A.

Manufacturer

The LM2576T-3.3 is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments specializes in designing and manufacturing a wide range of semiconductor and integrated circuit solutions, including analog, digital, and embedded systems. Founded in 1930, TI is well-known for its innovations in the electronics industry, particularly in the fields of signal processing, microcontrollers, and power management solutions. The LM2576 series is a popular family of voltage regulators used in various applications, reflecting TI's commitment to providing reliable and efficient electronic components for engineers and manufacturers worldwide.

Application

The LM2576T-3.3 is a step-down voltage regulator commonly used in various applications, including power supplies for consumer electronics, LED lighting, automotive power systems, battery chargers, and industrial automation. Its ability to provide a stable 3.3V output makes it suitable for microcontroller, FPGA, and DSP power management, as well as in circuit designs where efficient voltage regulation is required.

Equivalent

Equivalent products to the LM2576T-3.3 include the LM2576-3.3, LM2596-3.3, and the MIC2941. Additionally, the TPS54331 and the LT1083 can serve as alternatives, depending on specific requirements like current rating and voltage drop. Always check the datasheets for compatibility in terms of input/output voltage, current, and thermal performance.