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LM2574N-5G

Name: LM2574N-5G
Rating: 4.7 (12 reviews)

IC REG BUCK BOOST 5V 500MA 8PDIP

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資料表 LM2574N-5G DataSheet
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規格

Part Status	Active
Function	Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration	Positive or Negative
Topology	Buck, Boost, Buck-Boost
Output Type	Fixed
Number of Outputs	1
Voltage - Input (Min)	4.75V
Voltage - Input (Max)	40V
Voltage - Output (Min/Fixed)	5V
Current - Output	500mA
Frequency - Switching	52kHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Base Product Number	LM2574

概述

Description

The LM2574N-5G is a step-down (buck) voltage regulator designed to efficiently convert higher input voltages to a stable lower output voltage. It is part of the LM257x series and can deliver up to 1A of output current with a fixed output voltage of 5V. The device operates with an input voltage range of 7V to 40V, making it suitable for various applications, including power supplies for microcontrollers, sensors, and communication equipment.
Key features include a high-efficiency operation (up to 90%), built-in thermal shutdown, and current limiting for enhanced protection. The LM2574N-5G also integrates a switching frequency of 52kHz, allowing the use of smaller-sized inductors and capacitors, which aids in reducing overall system size. It is available in a 5-pin TO-220 package, facilitating easy integration into circuits. Overall, the LM2574N-5G is ideal for applications where space is limited but reliable power conversion is essential.

Features

The LM2574N-5G is a versatile step-down (buck) voltage regulator designed for various applications. Key features include:
1. Input Voltage Range: Operates from 7V to 40V.
2. Output Voltage: Fixed output of 5V with a load current capability up to 1A.
3. Efficiency: High efficiency (up to 85%) reduces heat generation.
4. Integrated Switch: Includes an internal power switch, minimizing external component count.
5. PWM Control: Utilizes pulse-width modulation for regulation, ensuring stable output.
6. Thermal Shutdown: Features internal thermal protection to prevent overheating.
7. Short-Circuit Protection: Safeguards against load short-circuits, enhancing reliability.
8. Frequency: Operates at a switching frequency of 52kHz, allowing for smaller inductors and capacitors.
9. Package Type: Available in a 5-lead TO-220 or a 7-lead TO-263 package, facilitating easy integration into designs.
The LM2574N-5G is ideal for power management in automotive, industrial, and consumer electronics applications.

Package

The LM2574N-5G is typically packaged in a TO-220 style package. This package type provides efficient thermal performance and is suitable for various applications requiring voltage regulation.

Pinout

The LM2574N-5G is a step-down voltage regulator with a pin count of 5. Its pin functions are as follows:
1. Pin 1 (VIN): Input voltage; connects to the supply voltage.
2. Pin 2 (GND): Ground; the reference point for the input and output voltages.
3. Pin 3 (SW): Switch; connects to the output and is the switching node for the internal transistor.
4. Pin 4 (VOUT): Output voltage; provides the regulated output voltage (5V in this case).
5. Pin 5 (COMP): Compensation; used to stabilize the feedback loop and improve transient response.
The LM2574N-5G can deliver up to 1A of output current and is designed for applications requiring a regulated output voltage with high efficiency.

Manufacturer

The LM2574N-5G is manufactured by Texas Instruments (TI), a prominent American technology company. Founded in 1930, Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits, which are widely used in electronics. The company is well-known for its innovations in analog and embedded processing technologies, providing solutions for a range of applications including industrial, automotive, consumer electronics, and communications. Texas Instruments is also recognized for its commitment to research and development, continuously advancing the capabilities and efficiency of electronic components.

Application

The LM2574N-5G is a step-down voltage regulator commonly used in applications such as power supplies for consumer electronics, automotive electronics, battery chargers, and industrial equipment. It efficiently converts higher input voltages to lower output voltages, making it suitable for systems requiring stable voltage with low ripple. Its compact design also enables integration into space-constrained environments and various portable devices.

Equivalent

Equivalent products to the LM2574N-5G include the LM2596, LM2576, and the LM2575. These are all step-down (buck) voltage regulators with similar specifications. Additionally, the MC34063 and the TPS5430 can also serve as alternatives depending on the specific application and requirements. Always verify compatibility based on output voltage, current capacity, and other parameters.