LM2574N-5.0

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LM2574N-5.0

IC REG BUCK 5V 500MA 8DIP

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規格

Package Tube
Series SIMPLE SWITCHER®
ProductStatus Obsolete
Function Step-Down
OutputConfiguration Positive
Topology Buck
OutputType Fixed
NumberofOutputs 1
Voltage-Input(Min) 4V
Voltage-Input(Max) 40V
Voltage-Output(Min/Fixed) 5V
Current-Output 500mA
Frequency-Switching 52kHz
SynchronousRectifier No
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Through Hole
Package/Case 8-DIP (0.300, 7.62mm)

概述

Description

The LM2574N-5.0 is a step-down (buck) voltage regulator from Texas Instruments, designed to provide a fixed 5.0V output with high efficiency and minimal external components. It is part of the LM2574 series, which are popular for their ease of use in DC-DC conversion applications.
Key features of the LM2574N-5.0 include a wide input voltage range typically from 7V to 40V, making it suitable for a variety of power sources. It offers a fixed output voltage of 5.0V with a maximum output current capability of 500mA. The device operates at a switching frequency of 52kHz, which reduces the size of external inductors and capacitors.
The LM2574N-5.0 incorporates an internal frequency compensation, a fixed-frequency oscillator, and a TTL shutdown capability. It is known for its high efficiency, typically around 80-90%, and features protections like thermal shutdown and current limiting.
The device is widely used in battery-powered applications, distributed power systems, and automotive electronics due to its reliability and ease of implementation. The "N" in LM2574N-5.0 indicates it comes in a through-hole DIP package, which is useful for prototyping and testing.

Features

The LM2574N-5.0 is a step-down voltage regulator designed for efficient power management. It features a fixed output voltage of 5.0V, making it suitable for a variety of applications. Key features include:
1. Wide Input Voltage Range: It supports an input voltage range of 7V to 40V.

2. Output Current Capability: The regulator can deliver an output current of up to 0.5A.
3. Efficiency: It offers high efficiency, typically around 75% to 85%, depending on the input and output voltages.
4. Low Quiescent Current: The device consumes minimal power when in standby mode, contributing to energy efficiency.
5. Fixed Frequency Operation: The LM2574 operates at a fixed frequency of 52 kHz, allowing predictable and stable performance.
6. Thermal Shutdown and Current Limiting: It includes built-in protections, such as thermal shutdown and current limiting, enhancing reliability and safety.
7. Simple Design: Requires minimal external components, simplifying the design and reducing overall costs.
These features make the LM2574N-5.0 ideal for applications needing efficient voltage regulation with minimal complexity.

Package

The LM2574N-5.0 is typically available in a DIP-8 (Dual In-line Package with 8 pins) package type. This package is commonly used for through-hole mounting on printed circuit boards.

Pinout

The LM2574N-5.0 is a step-down (buck) voltage regulator with a fixed output voltage of 5.0V. It comes in a standard 8-pin DIP (Dual In-line Package). Here is a brief description of its pin functions:
1. Pin 1 (VIN): Input voltage supply. This pin is where the unregulated input voltage is applied.
2. Pin 2 (Output): Regulated output voltage. This pin provides the regulated output of 5.0V.
3. Pin 3 (Ground): Common ground pin for both the input and output.
4. Pin 4 (Feedback): Used for adjusting the output voltage. For the fixed version, this pin is connected internally.
5. Pin 5 (ON/OFF): Enables or disables the device. A low signal turns the regulator off.
6. Pin 6 (NC - No Connection): Not internally connected, can be left floating.
7. Pin 7 (NC - No Connection): Not internally connected, can be left floating.
8. Pin 8 (NC - No Connection): Not internally connected, can be left floating.
This regulator is efficient for applications requiring a fixed output voltage with a reliable performance.

Manufacturer

The LM2574N-5.0 is manufactured by Texas Instruments, a global semiconductor company. Texas Instruments (TI) designs and produces a wide range of semiconductor technologies, with a focus on analog chips and embedded processors. They provide products and solutions for industrial, automotive, personal electronics, communications equipment, and enterprise systems. As one of the largest semiconductor companies in the world, TI is known for its innovation and reliable electronic components that are used in various applications across different industries.

Application

The LM2574N-5.0 is a step-down voltage regulator designed for applications requiring efficient power conversion. Key application areas include:
1. Distributed power systems.
2. Battery-powered equipment.
3. Industrial automation systems.
4. Automotive electronics.
5. Consumer electronics like TVs and set-top boxes.
6. Telecommunications equipment.
7. Embedded systems and microcontroller power supplies.
These applications benefit from its high efficiency, fixed 5V output, and ease of use.

Equivalent

The LM2574N-5.0 is a step-down (buck) voltage regulator. Equivalent products include the MC34063, LM2594-5.0, and L4971, among others. These alternatives offer similar functionalities with variations in specifications like input voltage range, output current capability, and efficiency. Always check the specific requirements and datasheets to ensure compatibility with your application.

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