LM2575HVT-12/LF03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575HVT-12/LF03 is a monolithic integrated circuit step-down switching regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates with an input voltage range of 4V to 60V and provides a fixed 12V output at up to 1A load current. The device utilizes a 52kHz internal oscillator for efficient DC-to-DC conversion in a buck topology. Designed for through-hole mounting, it is housed in a TO-220 package. The component supports an operating junction temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage switch capable of handling input voltages up to 60V
• Fixed 12V output configuration simplifies external component selection
• Internal frequency compensation eliminates need for external phase compensation networks
• Thermal shutdown protection safeguards against excessive heat conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring high input voltage step-down
• Pre-regulator stages for downstream linear regulators
• Battery-powered equipment utilizing high-voltage battery sources
• General-purpose DC-to-DC conversion in industrial control panels

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify manufacturer origin as National Semiconductor was acquired by Texas Instruments; datasheets may carry TI branding. Confirm RoHS compliance status via specific lot markings or official documentation, as LF03 suffix typically indicates lead-free and halogen-free construction. Check for obsolescence notices or lifecycle changes before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 12V output is required from a wide input voltage range up to 60V. Ensure the application demands through-hole mounting due to the TO-220 package constraint. Verify that the 1A continuous output current meets load requirements without exceeding thermal limits under expected ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2575HV series, which extends the standard LM2575 functionality to support higher input voltages. The HVT suffix denotes a through-hole version within the high-voltage line. The /LF03 suffix specifically identifies the lead-free and halogen-free compliant variant produced by Texas Instruments following its acquisition of National Semiconductor assets.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575HVT-12/NOPB serves as a direct functional equivalent with identical electrical specifications and pinout compatibility.