LM2575SX-3.3

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LM2575SX-3.3

IC REG BUCK 3.3V 1A TO263

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  • Mfr. Parte #LM2575SX-3.3
  • Paquete
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  • En stock3282

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Especificaciones

Series SIMPLE SWITCHER®
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 1A
Frequency - Switching 52kHz
Synchronous Rectifier No
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount
Package / Case TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package TO-263 (DDPAK-5)
Base Product Number LM2575

Descripción general

Description

The LM2575SX-3.3 is a monolithic integrated circuit designed for step-down (buck) voltage regulation. It provides a fixed output voltage of 3.3V and can deliver an output current of up to 1A. The device operates at a fixed switching frequency of 52 kHz, enabling efficient power conversion with minimal external components. Key features include a wide input voltage range, typically from 4V to 40V, and built-in thermal shutdown and current limit protection to enhance reliability. The LM2575SX-3.3 is known for its simplicity, requiring only a few external components like an inductor, a diode, and input/output capacitors, making it suitable for various applications including power management in consumer electronics, industrial equipment, and automotive systems. Its TO-263 surface-mount package ensures compact design and efficient heat dissipation. Overall, it is favored for its ease of use, reliability, and effective performance in low to medium power applications.

Features

The LM2575SX-3.3 is a step-down voltage regulator from the LM2575 series. Here are its key features:
1. Fixed Output Voltage: Provides a 3.3V output.
2. Output Current: Capable of delivering up to 1A of output current.
3. Wide Input Voltage Range: Operates with an input voltage from 4V to 40V.
4. Efficiency: High efficiency due to its switching design, typically around 88%.
5. Switching Frequency: Fixed frequency operation at approximately 52 kHz.
6. Thermal Shutdown: Integrated protection feature to prevent overheating.
7. Current Limiting: Built-in current limiting to protect against overload conditions.
8. Overvoltage Protection: Safeguards against excessive voltage.
9. Low Component Count: Requires minimal external components, simplifying design.
10. TO-263 Package: Comes in a surface-mount package for easy PCB integration.
11. Versatile Applications: Suitable for a variety of power supply solutions in consumer and industrial electronics.
These features make the LM2575SX-3.3 an efficient and reliable choice for applications needing a 3.3V output from a higher voltage input.

Package

The LM2575SX-3.3 is a step-down voltage regulator, and its package type is TO-263, also known as a D2PAK surface-mount package. This package is designed for efficient thermal management and is suitable for high-power applications.

Pinout

The LM2575SX-3.3 is a voltage regulator integrated circuit (IC) from the LM2575 series, specifically designed to provide a fixed 3.3V output. It comes in a 5-pin surface mount TO-263 package. Here is a brief overview of the pin functions:
1. Pin 1 (VIN): This is the input pin where the DC voltage is supplied. It can handle input voltages ranging from approximately 7V to 40V.
2. Pin 2 (Output): This pin provides the regulated 3.3V output. It is connected to the load that requires the regulated voltage.
3. Pin 3 (Ground): This is the ground pin, which is the reference point for the input and output voltages.
4. Pin 4 (Feedback): This pin is used to maintain the output voltage. In the fixed output version like the 3.3V, it is internally connected, so no external components are necessary.
5. Pin 5 (ON/OFF): This pin is used to enable or disable the regulator. Pulling this pin low disables the output, placing the device in a low-power shutdown mode. If not used, it should be connected to a high level or the input voltage for normal operation.
The LM2575SX-3.3 is widely used for its efficiency and simplicity in applications requiring a regulated 3.3V output.

Manufacturer

The LM2575SX-3.3 is manufactured by Texas Instruments, a global technology company. Texas Instruments is known for designing and manufacturing semiconductors and various integrated circuits, which are used in a wide range of electronic devices and systems. The company is a major player in the electronics industry, providing products and solutions for sectors such as automotive, industrial, personal electronics, communications, and enterprise systems. Texas Instruments is headquartered in Dallas, Texas, and is well-regarded for its innovation and extensive product portfolio that supports both analog and embedded processing technologies.

Application

The LM2575SX-3.3 is a step-down voltage regulator used in applications requiring efficient voltage conversion from higher to lower levels. Its application areas include power supply units for microcontrollers, battery-powered devices, embedded systems, industrial automation, telecommunications, and consumer electronics. It is ideal for systems requiring a stable 3.3V output with up to 1A current capability, often used in prototyping and development boards, automotive electronics, and distributed power systems.

Equivalent

The LM2575SX-3.3 is a step-down voltage regulator. Equivalent products include:
1. LM2575T-3.3 (by Texas Instruments/National Semiconductor)
2. L4971 (by STMicroelectronics)
3. MC34063A (with external components adjustment, by ON Semiconductor)
4. NCP3063 (by ON Semiconductor)
5. L78S33CV (by STMicroelectronics, with consideration of different specifications)
These alternatives may have different specifications, so check datasheets for compatibility.

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