LM2575-3.3WT

Product Overview

Category

The LM2575-3.3WT belongs to the category of voltage regulators.

Use

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

Characteristics

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 3.3V
• Output Current: Up to 1A
• Efficiency: Up to 92%
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Package

The LM2575-3.3WT comes in a TO-220 package, which provides good thermal conductivity and easy mounting on a heat sink.

Essence

The essence of LM2575-3.3WT lies in its ability to efficiently convert higher input voltages into a stable 3.3V output for various applications.

Packaging/Quantity

The LM2575-3.3WT is typically available in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Input Voltage Range: 4.75V to 40V
• Output Voltage: 3.3V ±4%
• Output Current: Up to 1A
• Dropout Voltage: 1.2V (typical)
• Line Regulation: 0.5% (typical)
• Load Regulation: 0.5% (typical)
• Quiescent Current: 10mA (typical)
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2575-3.3WT has the following pin configuration:

1. VIN (Pin 1): Input voltage pin
2. GND (Pin 2): Ground reference pin
3. FB (Pin 3): Feedback pin
4. VOUT (Pin 4): Output voltage pin
5. ON/OFF (Pin 5): Enable/Shutdown control pin

Functional Features

• Wide input voltage range allows for versatile applications.
• High efficiency ensures minimal power loss during voltage conversion.
• Built-in thermal shutdown and current limit protection enhance reliability.
• Adjustable output voltage through external resistors.
• Enable/Shutdown control for power management.

Advantages and Disadvantages

Advantages

• Efficient voltage regulation with high output current capability.
• Wide input voltage range enables compatibility with various power sources.
• Compact TO-220 package facilitates easy mounting and heat dissipation.
• Built-in protection features enhance reliability and prevent damage.

Disadvantages

• Switching frequency may introduce noise in sensitive applications.
• Requires external components for proper operation.
• Limited output voltage options (fixed at 3.3V).

Working Principles

The LM2575-3.3WT is a step-down switching regulator that utilizes pulse-width modulation (PWM) to regulate the output voltage. It operates by rapidly switching an internal power transistor on and off, controlling the energy transfer from the input to the output. This switching action allows for efficient voltage conversion while minimizing power dissipation.

Detailed Application Field Plans

The LM2575-3.3WT finds application in various fields, including:

1. Power supply circuits for microcontrollers and digital ICs.
2. Battery-powered devices requiring stable voltage levels.
3. Automotive electronics for voltage regulation.
4. Industrial automation systems.
5. LED lighting applications.
6. Portable electronic devices.

Detailed and Complete Alternative Models

Some alternative models to LM2575-3.3WT include:

1. LM2596-3.3V: Similar functionality with adjustable output voltage.
2. LM317T: Linear voltage regulator with adjustable output voltage.
3. LM1117-3.3: Low dropout voltage regulator with fixed 3.3V output.
4. LT1084CT-3.3: High current linear voltage regulator with fixed 3.3V output.

These alternative models offer different features and specifications, providing flexibility for various application requirements.

In conclusion, the LM2575-3.3WT is a versatile voltage regulator that efficiently converts higher input voltages into a stable 3.3V output. With its wide input voltage range, high efficiency, and built-in protection features, it finds applications in diverse fields such as power supply circuits, automotive electronics, and portable devices. While it has some limitations, there are alternative models available to suit specific needs.