LM2575-3.3YN

Product Overview

Category

The LM2575-3.3YN 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 LM2575-3.3YN comes in a TO-220 package, which provides good thermal conductivity and easy mounting on a PCB (Printed Circuit Board).

Essence

The essence of LM2575-3.3YN lies in its ability to efficiently convert higher input voltages into a stable 3.3V output voltage, making it suitable for various electronic applications.

Packaging/Quantity

The LM2575-3.3YN 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
• Output Current: Up to 1A
• Switching Frequency: 52 kHz
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to +125°C
• Package: TO-220

Detailed Pin Configuration

The LM2575-3.3YN has the following pin configuration:

• Pin 1 (VIN): Input voltage pin
• Pin 2 (GND): Ground reference pin
• Pin 3 (FB): Feedback pin
• Pin 4 (SW): Switching pin
• Pin 5 (VOUT): Output voltage pin

Functional Features

• Efficiency: The LM2575-3.3YN offers high efficiency, reducing power dissipation and maximizing battery life in portable applications.
• Wide Input Voltage Range: It can accept a wide range of input voltages, making it versatile for various power supply designs.
• Short Circuit Protection: The device incorporates short circuit protection, preventing damage to the regulator during fault conditions.
• Thermal Shutdown: LM2575-3.3YN includes thermal shutdown functionality, which protects the device from overheating.

Advantages and Disadvantages

Advantages

• High efficiency
• Wide input voltage range
• Short circuit protection
• Thermal shutdown feature
• Easy to mount on PCB due to TO-220 package

Disadvantages

• Requires external components for operation
• Switching frequency may cause electromagnetic interference in sensitive circuits

Working Principles

The LM2575-3.3YN is a step-down switching regulator that uses a pulse width modulation (PWM) control scheme. It operates by rapidly switching an internal power transistor on and off to regulate the output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switch to maintain a stable 3.3V output.

Detailed Application Field Plans

The LM2575-3.3YN finds applications in various fields, including:

1. Power supply modules for microcontrollers and digital circuits.
2. Battery-powered devices requiring a stable 3.3V voltage source.
3. Automotive electronics, such as car audio systems and dashboard displays.
4. Industrial automation systems, where reliable voltage regulation is crucial.
5. Telecommunications equipment, including routers and switches.

Detailed and Complete Alternative Models

Some alternative models to LM2575-3.3YN include:

1. LM2596-3.3V: Similar functionality with a different package (TO-263).
2. LM317T: Linear voltage regulator with adjustable output voltage.
3. LT1084CP-3.3: High current linear voltage regulator with fixed 3.3V output.

These alternative models offer similar voltage regulation capabilities but may have different features, packages, or performance characteristics.

In conclusion, the LM2575-3.3YN 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 various protection features, it finds applications in diverse fields such as power supply modules, automotive electronics, and telecommunications equipment.