Microchip Technology, Inc. Voltage Regulators - DC DC Switching Regulators LM2576-5.0BU

The LM2576-5.0BU is a monolithic integrated circuit designed for step-down (buck) switching regulation, providing a fixed output voltage of 5V with a maximum output current of 3A. It operates efficiently over a wide input voltage range of 7V to 40V and features a guaranteed output voltage tolerance of ±3% under specified conditions. The device includes an internal fixed-frequency oscillator operating at 52kHz, requiring only four external components for operation, which simplifies design efforts. This regulator is characterized by low power consumption in standby mode, typically drawing less than 200µA. It incorporates essential protection features such as thermal shutdown and cycle-by-cycle current limiting, ensuring reliable operation under fault conditions. The LM2576-5.0BU is suitable for various applications, including high-efficiency step-down regulation and as a pre-regulator for linear regulators. Its compact design and high efficiency make it a viable choice for engineers looking to reduce heat sink requirements in their projects.