LM2575-3.3BU TR

Product Overview

Category

The LM2575-3.3BU TR 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 LM2575-3.3BU TR comes in a TO-263-5 (D2PAK) package.

Essence

This voltage regulator is designed to provide a stable and regulated output voltage of 3.3V, making it suitable for various electronic applications.

Packaging/Quantity

The LM2575-3.3BU TR is typically packaged in reels or tubes, with a quantity of 250 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)
• Switching Frequency: 52 kHz
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-263-5 (D2PAK)

Detailed Pin Configuration

The LM2575-3.3BU TR has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. FB (Feedback)
4. VOUT (Output Voltage)
5. SW (Switching Pin)

Functional Features

• Wide input voltage range allows for flexibility in various applications.
• High efficiency ensures minimal power loss during voltage regulation.
• Overcurrent protection safeguards the circuit from excessive current flow.
• Thermal shutdown protection prevents damage due to overheating.
• Short-circuit protection ensures the safety of the circuit.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables compatibility with different power sources.
• High efficiency reduces power dissipation and improves overall system performance.
• Compact package size facilitates easy integration into electronic circuits.
• Built-in protection features enhance the reliability and durability of the regulator.

Disadvantages

• The fixed output voltage of 3.3V may limit its use in applications requiring different voltage levels.
• The switching frequency of 52 kHz may introduce noise in sensitive analog circuits.

Working Principles

The LM2575-3.3BU TR 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 an internal switch, and then filtered to provide a stable 3.3V output. The feedback pin monitors the output voltage and adjusts the duty cycle of the internal switch to maintain the desired output voltage level.

Detailed Application Field Plans

The LM2575-3.3BU TR can be used in various applications, including but not limited to:

1. Power supplies for microcontrollers and digital circuits.
2. Battery-powered devices requiring a regulated 3.3V supply.
3. Automotive electronics, such as car audio systems and dashboard displays.
4. Industrial control systems and automation equipment.
5. LED lighting applications.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM2575-3.3BU TR include:

1. LM2596-3.3V: A popular buck converter with adjustable output voltage.
2. LM317: A linear voltage regulator capable of providing a fixed 3.3V output.
3. TPS54332: A synchronous buck converter with a wide input voltage range and adjustable output voltage.

These alternative models can be considered based on specific application requirements and design constraints.

In conclusion, the LM2575-3.3BU TR is a versatile voltage regulator that offers stable and efficient voltage regulation for various electronic applications. Its wide input voltage range, compact package, and built-in protection features make it a reliable choice for designers seeking a regulated 3.3V power supply.