Texas Instruments LM2596 Modulo regolatore di tensione TO-220 Convertitore a commutazione

Panoramica

The LM2596 is a monolithic integrated circuit designed for step-down (buck) voltage regulation. It provides all the active functions necessary for a switching regulator, capable of driving a 3A load with excellent line and load regulation. This device is available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version. It operates at a switching frequency of 150 kHz, allowing for smaller size filter components compared to lower frequency switching regulators.

This regulator is simple to use and requires only a few external components. It includes internal frequency compensation and a fixed-frequency oscillator. The LM2596 is designed to minimize the number of external components, simplify the power supply design process, and provide a cost-effective solution for a wide range of applications.

Parametri tecnici

Intervallo di tensione in ingresso

The device operates with an input voltage range of 4.5V to 40V, making it suitable for a variety of power supply sources, including battery-powered systems and unregulated DC supplies.

Output Voltage Options

– Fixed output voltages: 3.3V, 5V, and 12V
– Adjustable output version: 1.23V to 37V (with external resistor divider)

Corrente di uscita

The regulator is capable of delivering up to 3A of continuous output current, depending on the input voltage and thermal conditions.

Frequenza di commutazione

The internal oscillator operates at a fixed frequency of 150 kHz, which allows for the use of smaller inductors and capacitors, reducing overall board space.

Efficienza

The device offers high efficiency, typically up to 73% to 90%, depending on the input/output voltage conditions and load current.

Thermal Shutdown and Current Limiting

The LM2596 includes built-in thermal shutdown and current limiting features to protect the device and the load under fault conditions.

Opzioni del pacchetto

– TO-220 (5-pin)
– TO-263 (5-pin surface-mount)

Other Features

– Requires only four external components
– Uses readily available standard inductors
– TTL shutdown capability
– Low power standby mode
– High efficiency
– Thermal shutdown and current limit protection
– Output voltage is adjustable from 1.23V to 37V (adjustable version)

Applicazioni tipiche

Elettronica di consumo

The device is widely used in consumer electronics for powering microcontrollers, sensors, and other low-voltage digital circuits from higher voltage sources. Its high efficiency and compact size make it ideal for portable and battery-powered devices.

Industrial Equipment

In industrial environments, the regulator is used to step down 24V or 36V supply rails to lower voltages required by control systems, displays, and communication modules.

Automotive Systems

The wide input voltage range and robust design make it suitable for automotive applications, where it can regulate voltage from the car battery to power infotainment systems, dashboard electronics, and other subsystems.

Embedded Systems

The adjustable version is particularly useful in embedded systems where custom voltage levels are required. It can be configured to provide precise voltages for FPGAs, microprocessors, and memory modules.

Communication Equipment

The device is also used in networking and communication equipment to provide stable power to transceivers, modems, and routers.

Informazioni sul marchio Texas Instruments

Texas Instruments (TI) is a global semiconductor company that designs, manufactures, tests, and sells analog and embedded processing chips. With decades of experience in power management solutions, TI is known for its high-quality, reliable, and innovative products. The company provides extensive documentation, design tools, and technical support to help engineers integrate its components into a wide range of applications.

TI’s power management portfolio includes a broad selection of linear regulators, switching regulators, and power modules. The LM2596 is part of this portfolio and reflects TI’s commitment to delivering efficient and easy-to-use power solutions. TI’s rigorous testing and quality assurance processes ensure that each device meets high standards for performance and reliability.

FAQ

Q1: What is the maximum input voltage supported?

A1: The device supports a maximum input voltage of 40V, making it suitable for a wide range of input sources including unregulated DC supplies and automotive batteries.

Q2: Can the output voltage be adjusted?

A2: Yes, the adjustable version allows the output voltage to be set from 1.23V to 37V using an external resistor divider network.

Q3: What is the typical switching frequency?

A3: The internal oscillator operates at a fixed frequency of 150 kHz, which helps reduce the size of external filter components.