LM2575-12BU

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575-12BU is a monolithic integrated circuit step-down switching regulator manufactured by Microchip Technology. It operates with an input voltage range of 4V to 40V and provides a fixed 12V output at up to 1A load current. The device utilizes a buck topology with a typical switching frequency of 52kHz. It is housed in a TO-263-5 surface-mount package (D2PAK) and supports an operating junction temperature range from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation for simplified design
• Includes built-in thermal shutdown and cycle-by-cycle current limiting for system protection
• Requires minimal external components to implement efficient DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient point-of-load regulation modules
• Pre-regulation stages for linear post-regulators
• Positive-to-negative voltage inversion circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer marking on the component body to confirm it originates from Microchip Technology, as this part number family has been produced by multiple vendors including Texas Instruments and ON Semiconductor. Ensure the suffix 'BU' corresponds to the specific TO-263-5 surface mount package variant required for your PCB layout. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from a variable input source between 4V and 40V. It is suitable for designs prioritizing simplicity over high-frequency operation due to its 52kHz switching rate. Consider the thermal performance of the TO-263-5 package under full 1A load conditions and ensure adequate copper area for heat dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2575 series of switching regulators, which are widely recognized for replacing traditional three-terminal linear regulators. The series offers significant efficiency improvements and reduced heat generation. The LM2575-12BU specifically targets applications requiring a stable 12V rail with moderate current capabilities in a compact surface-mount form factor.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2575-12/NOPB from Texas Instruments and NCV2575D2T-12G from ON Semiconductor. Verify pinout compatibility and thermal characteristics before substitution.