Microchip Technology, Inc. Voltage Regulators - DC DC Switching Regulators LM2576-12BU TR

The LM2576-12BU TR is a monolithic integrated circuit designed for step-down (buck) switching regulation, providing a fixed output voltage of 12V with a maximum output current of 3A. It operates efficiently with a wide input voltage range of 7V to 40V and features a guaranteed output voltage tolerance of ±3% under specified conditions. The device includes internal frequency compensation and a fixed-frequency oscillator operating at 52kHz, which simplifies the design process by requiring only four external components. This regulator is particularly advantageous for applications where heat dissipation is a concern, as it can significantly reduce the need for heat sinks compared to traditional linear regulators. The LM2576-12BU TR also incorporates essential protection features such as thermal shutdown and cycle-by-cycle current limiting, ensuring reliable operation under fault conditions. Its low power standby mode, with a typical quiescent current of less than 200µA, further enhances its efficiency. This product is suitable for various applications, including on-card switching regulators and efficient pre-regulators for linear regulators.