The LM2575TV-3.3 from ON Semiconductor is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator capable of driving a 1A load with excellent line and load regulation. This voltage regulator is particularly suitable for simple, high-efficiency power supplies that require a low voltage, steady output of 3.3V.

Key Features:

• Output Voltage: 3.3V fixed output
• Output Current: 1A
• High Efficiency: Up to 77% depending on input voltage and load
• Voltage Input Range: 4.75V to 40V
• Thermal Shutdown and Current Limit Protection
• Requires Only 4 External Components
• 52 kHz Fixed Frequency Internal Oscillator
• TTL Shutdown Capability
• Available in TO-220 package

Applications:

The LM2575TV-3.3 is versatile and can be used in various applications, including but not limited to:

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

Performance Summary:

The LM2575TV-3.3 offers a simple solution for a wide range of power supply designs by integrating a fixed-frequency oscillator, a precision reference, high-efficiency power switch, and associated circuitry in a single package. It can provide a steady 3.3V output from a wide range of input voltages, making it ideal for battery-powered devices, embedded systems, and other electronics where power efficiency is critical. It's designed to minimize the number of external components, simplifying the design and layout process for engineers and hobbyists alike.

Its robust protection features, such as thermal shutdown and current limit protection, ensure reliable operation under varying conditions. The LM2575TV-3.3's capability to handle a 1A load makes it a strong choice for moderate power applications.