LM2575D2T-015

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575D2T-015 is a monolithic integrated circuit switching regulator manufactured by onsemi, formerly National Semiconductor. It functions as a step-down (buck) DC-to-DC converter designed for high-efficiency power management. The device integrates a fixed internal oscillator and requires minimal external components to operate. Key electrical specifications include a maximum output current of 1 A, an input voltage range up to 40 V, and a fixed switching frequency of 52 kHz. The unit provides a regulated 15 V output and operates within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency internal oscillator to simplify external component requirements.
• Includes built-in thermal shutdown and current limiting protection circuits.
• Features a dedicated ON/OFF control pin for system power management.

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down switching regulators
• Buck converters
• Pre-regulators for linear post-regulator ICs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin carefully, as the LM2575 series was originally developed by National Semiconductor and is now produced by onsemi. Confirm that the specific suffix D2T corresponds to the TO-263-5 surface-mount package variant. Ensure the part number indicates the correct 15V fixed output version rather than adjustable or other voltage variants.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, single-inductor buck topology is required for 1A loads. The fixed 52 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the TO-263-5 package for surface-mount assembly needs while ensuring adequate thermal dissipation for the operating environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2575 family of switching regulators, which are widely recognized for their ease of design and reliability in DC-DC conversion applications. The series includes standard voltage versions like the LM2575 and high-voltage input versions like the LM2575HV. The LM2575D2T-015 specifically denotes the 15V output variant in the TO-263-5 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2575D2T-15G from onsemi and LM2575D2T-15/NOPB from Texas Instruments. Verify pinout compatibility and thermal performance characteristics before substitution.