LM2575BU TR

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575BU TR is a monolithic integrated circuit providing active functions for a step-down (buck) switching regulator. It operates with a fixed switching frequency of 52kHz and delivers an output current of 1A. The device accepts an input voltage range from 4V to 40V and provides a positive adjustable output starting at 1.23V. It utilizes a TO-263-6 package, also known as D2PAK, which includes five leads plus a tab. The component features thermal shutdown and current limit protection mechanisms.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated thermal shutdown and current limit protection
• Fixed 52kHz switching frequency operation
• Monolithic buck switching regulator design

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down DC-DC conversion circuits
• Positive adjustable voltage regulation
• Power management in switching regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and tape-and-reel configuration against the manufacturer's official datasheet. Confirm that the TO-263-6 package matches the target PCB footprint. Ensure the part number corresponds to the adjustable version rather than fixed voltage variants within the LM2575 family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a simple 1A buck regulator topology. The adjustable output allows flexibility for various voltage requirements above 1.23V. Consider the thermal performance of the TO-263 package for heat dissipation needs in high-current scenarios.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of switching regulators manufactured by Microchip Technology. The series is designed for efficient step-down conversion. The BU variant specifically denotes the TO-263 surface-mount package, distinguishing it from other package options like SOIC or DIP available in the broader product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM2575 series parts with compatible packages and electrical characteristics. Verify pinout compatibility and thermal resistance values when considering alternative manufacturers or package variations within the same functional family.