LM2576SX-3.3/NOPB

Product Overview

Category

The LM2576SX-3.3/NOPB belongs to the category of voltage regulators.

Use

It is commonly used to regulate and control voltage levels in electronic circuits.

Characteristics

• Input Voltage Range: 4.5V to 40V
• Output Voltage: 3.3V
• Output Current: Up to 3A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-263-7 (D²PAK/TO-263)

Packaging/Quantity

The LM2576SX-3.3/NOPB is typically available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Input Voltage Range: The LM2576SX-3.3/NOPB can accept input voltages ranging from 4.5V to 40V.
• Output Voltage: It provides a fixed output voltage of 3.3V.
• Output Current: The device can deliver a maximum output current of up to 3A.
• Efficiency: With an efficiency rating of up to 92%, it ensures minimal power loss during voltage regulation.
• Switching Frequency: The LM2576SX-3.3/NOPB operates at a switching frequency of 52 kHz.
• Operating Temperature Range: It can operate within a temperature range of -40°C to +125°C.

Pin Configuration

The LM2576SX-3.3/NOPB has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. FB (Feedback)
4. VOUT (Output Voltage)
5. ON/OFF (Enable/Disable)
6. SW (Switching Node)
7. NC (No Connection)

Functional Features

• Voltage Regulation: The LM2576SX-3.3/NOPB provides stable and regulated output voltage of 3.3V, regardless of input voltage fluctuations.
• High Efficiency: With an efficiency rating of up to 92%, it minimizes power dissipation and maximizes energy utilization.
• Wide Input Voltage Range: It can accept a wide range of input voltages from 4.5V to 40V, making it suitable for various applications.
• Overcurrent Protection: The device incorporates overcurrent protection to safeguard against excessive current flow.
• Thermal Shutdown: It includes thermal shutdown protection to prevent overheating and damage to the regulator.

Advantages and Disadvantages

Advantages

• High efficiency ensures minimal power loss.
• Wide input voltage range allows for versatile applications.
• Overcurrent protection enhances circuit safety.
• Thermal shutdown prevents overheating.

Disadvantages

• Fixed output voltage limits flexibility in certain applications.
• Switching frequency may introduce noise in sensitive circuits.

Working Principles

The LM2576SX-3.3/NOPB is a step-down switching voltage regulator. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The input voltage is first stepped down by a high-frequency switch, which is controlled by the PWM signal. This switched voltage is then filtered and regulated to provide a stable 3.3V output. The feedback mechanism continuously monitors the output voltage and adjusts the duty cycle of the PWM signal to maintain the desired output voltage level.

Detailed Application Field Plans

The LM2576SX-3.3/NOPB finds extensive application in various electronic systems, including:

1. Power Supplies: It is commonly used in power supply circuits to regulate voltage levels for microcontrollers, sensors, and other electronic components.
2. Battery Charging: The LM2576SX-3.3/NOPB can be employed in battery charging circuits to provide a stable voltage for charging batteries efficiently.
3. Automotive Electronics: It is suitable for automotive applications, such as powering microcontrollers, sensors, and LED lighting systems.
4. Industrial Control Systems: The regulator can be utilized in industrial control systems to ensure stable voltage supply for various control modules and devices.

Detailed and Complete Alternative Models

1. LM2596S-ADJ/NOPB: This adjustable voltage regulator offers a wider output voltage range and similar features to the LM2576SX-3.3/NOPB.
2. LM317T: A popular linear voltage regulator that provides adjustable output voltage with low dropout voltage.
3. XL6009E1: A step-up/step-down voltage regulator capable of boosting or reducing input voltage levels.

These alternative models offer different features and specifications, allowing users to choose the most suitable option for their specific requirements.

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