LM2576D2T-3.3

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LM2576D2T-3.3 is a DC-DC Step-Down buck switching regulator from Texas Instruments with Advanced Gate Drivers Technology. It features a wide input voltage range of 4.5V to 40V, with a switch drop of up to 5.5V, and is capable of delivering an output voltage of 3.3V. The LM2576D2T-3.3 is very efficient, providing up to 95 percent average efficiency over a wide load range. The chip offers excellent transient performance, providing a clean output voltage with very fast response even under rapid load changes. It has a maximum switching frequency of 350kHz, allowing the use of smaller external components. The device operates at a maximum of 80°C junction temperature, and requires very little input capacitance.

The LM2576D2T-3.3 is mainly used as a voltage regulator to produce a regulated output voltage or a constant current source from a DC source. It is typically used in power supplies for industrial, automation, and consumer applications where a wide input voltage range and fast transient response are required. The switching regulator also finds use in automotive, renewable energy, solar and battery-based applications, as well as in power communication, and computer products.

The LM2576D2T-3.3 is based on synchronous rectification topology, which helps to ensure excellent efficiency and fast response times. Low inductance is required for the input capacitance, which leads to very low power losses when transitioning between light and heavy load currents. An internal current limit switch and a shutdown protection circuit help protect the device from excessive current and temperature conditions.

The LM2576D2T-3.3 has a wide operating temperature range, spanning from -40°C to +125°C and is available in several form factors to suit different applications. It is designed to operate under a wide range of input voltages and output currents, enabling flexible design implementation. Its low quiescent current (<1 mA) and low operating temperature makes it suitable for energy-sensitive applications. Furthermore, its integrated discharge transistor allows for discharging of the output caps for a short period of time, thus providing a reliable start-up and stable operation.

The LM2576D2T-3.3 is an advanced voltage regulator that provides excellent performance in terms of high efficiency, fast transient response, stability and reliability. Its wide input voltage range, advanced synchronous rectification topology, and small form factor makes it an excellent choice for a wide range of applications.

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