Overview of the LM2575HVT-3.3 Voltage Regulator

The LM2575HVT-3.3, manufactured by Texas Instruments, is a robust and highly efficient voltage regulator designed to cater to a wide range of power supply applications. This device is part of the LM2575 series, which are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator.

Key Features

• Output Voltage: The LM2575HVT-3.3 is specifically designed to deliver a fixed output voltage of 3.3V, which is ideal for powering 3.3V logic in various electronic systems.
• Output Current: It can provide up to 3A of output current, making it suitable for applications with substantial power requirements.
• High Efficiency: This regulator has an efficiency rating of up to 52%, ensuring minimal heat generation and power loss during operation.
• Wide Input Voltage Range: It can operate with an input voltage range from 4.75V to 40V, offering flexibility in accommodating different power sources and voltage fluctuations.
• 52kHz Fixed Frequency Internal Oscillator: The built-in oscillator helps to reduce the number of external components needed and simplifies the circuit design.
• Thermal Shutdown and Current Limit Protection: These features protect the device against potentially damaging conditions such as overheating and overcurrent scenarios.

Applications

The LM2575HVT-3.3 is versatile and can be used in various applications, including:

• Simple high-efficiency step-down (buck) regulators
• Efficient pre-regulators for linear regulators
• On-card switching regulators
• Positive to negative converter (Buck-Boost)

Package and Reliability

This device is available in a TO-220 package, known for its durability and ease of mounting on printed circuit boards (PCBs). The LM2575HVT-3.3 is characterized for operation over the full military temperature range of −55°C to +150°C, ensuring reliable performance in extreme conditions.

With its comprehensive set of features and robust design, the LM2575HVT-3.3 from Texas Instruments stands out as a reliable choice for designers looking to integrate a stable and efficient power supply into their electronic projects.