LM2575T-ADJ/LF02

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-ADJ/LF02 is a SIMPLE SWITCHER® 1A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 4.75V to 40V and provides a fixed output of 12V at 1A current capacity. The device features a switching frequency of 52kHz, ensuring efficient power conversion in compact designs. Packaged in a TO-220-5 through-hole format, it supports operation across a temperature range of -40°C to +125°C. This component integrates internal compensation and a fixed-frequency oscillator for stable performance in various DC-DC applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated buck topology simplifies design by requiring minimal external components
• Fixed 52kHz switching frequency enables the use of small inductors and capacitors
• Internal thermal shutdown and current limiting protect against overload conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load DC-DC conversion modules
• Pre-regulation stages for linear regulators
• Battery-powered equipment power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific suffix LF02 corresponds to the intended tube packaging configuration and pinout compatibility. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the procurement channel provides valid traceability for this discontinued part number. Cross-reference datasheet revisions to confirm electrical parameter consistency before integration into new designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 1A buck converter solution is required for through-hole assembly. The fixed 12V output eliminates the need for external feedback resistors, reducing bill of materials complexity. Consider the thermal dissipation requirements of the TO-220 package under maximum load conditions. Evaluate the 40V maximum input limit against the system's supply voltage variations to ensure safe operating margins.

Voltage Regulators - DC DC Switching Regulators Part Context

This regulator belongs to the LM2575 series, a family of monolithic integrated circuits designed for direct replacement for 78xx-type adjustable regulators in step-down (buck) switching applications. The series offers simplicity of use and inherent reliability, making it suitable for general-purpose power supply designs where efficiency and size are critical constraints compared to linear alternatives.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-ADJ/LF03 is listed as a parameter-equivalent substitute from Texas Instruments.