LM2576TV-012G

Product Overview

Category: Voltage Regulator
Use: Step-Down (Buck) Switching Regulator
Characteristics: High Efficiency, Adjustable Output Voltage, Wide Input Voltage Range
Package: TO-220
Essence: Integrated Circuit (IC)
Packaging/Quantity: Tube / 50 pieces per tube

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.23V to 37V
• Output Current: Up to 3A
• Switching Frequency: 52 kHz
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2576TV-012G has five pins:

1. VIN (Pin 1): Input voltage pin.
2. GND (Pin 2): Ground reference pin.
3. FB (Pin 3): Feedback pin for adjusting the output voltage.
4. SW (Pin 4): Switching pin connected to the inductor.
5. VOUT (Pin 5): Output voltage pin.

Functional Features

• Step-down voltage regulation with high efficiency.
• Adjustable output voltage using an external resistor divider.
• Built-in thermal shutdown and current limit protection.
• Soft-start function to reduce inrush current during startup.
• Low standby current consumption.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power dissipation. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility. - Integrated protection features enhance reliability. - Compact TO-220 package facilitates easy mounting.

Disadvantages: - Requires additional external components for operation. - Limited maximum output current compared to some other regulators. - Switching frequency may cause electromagnetic interference in sensitive applications.

Working Principles

The LM2576TV-012G is a step-down switching regulator that converts a higher input voltage to a lower output voltage. It utilizes pulse-width modulation (PWM) to control the duty cycle of the internal power switch, which regulates the output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly. By adjusting the resistor divider connected to the FB pin, the desired output voltage can be set.

Detailed Application Field Plans

The LM2576TV-012G finds applications in various fields, including:

1. Power Supply Design: It can be used to design efficient and adjustable power supplies for electronic devices.
2. Battery Charging: It is suitable for charging batteries by stepping down the input voltage to the required charging voltage.
3. Automotive Electronics: It can be employed in automotive systems for voltage regulation and power management.
4. Industrial Automation: It finds use in industrial automation systems for controlling and regulating voltages in different stages of the process.

Detailed and Complete Alternative Models

1. LM2596S-ADJ: Similar to LM2576TV-012G but with a different package (TO-263).
2. LM317T: Adjustable linear voltage regulator with a different working principle.
3. XL4015: Step-down buck converter with higher output current capability.

These alternative models offer similar functionalities and can be considered as substitutes depending on specific requirements.

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