LM2575HVT-ADJ/LB03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575HVT-ADJ/LB03 is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, designed for high-voltage input applications. It operates with an input voltage range of 4V to 60V and delivers a continuous output current of 1A. The adjustable output voltage ranges from 1.23V to 57V. This component utilizes pulse-width modulation (PWM) control at a typical switching frequency of 52kHz. It is housed in a 5-pin TO-220 package suitable for through-hole mounting. The device supports an operating temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch capable of handling 1A load current
• Fixed internal oscillator eliminates the need for external timing components
• Built-in thermal shutdown circuitry protects against excessive junction temperatures
• Internal freewheeling diode simplifies circuit design and reduces component count

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring buck conversion
• Pre-regulators for linear post-regulator modules
• Efficient on-card regulation for board-level DC/DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix LB03 against official Texas Instruments documentation to confirm pinout compatibility and marking codes. Ensure the procurement channel provides genuine parts with traceable manufacturing dates. Check for RoHS compliance status as indicated in the latest datasheet revision. Confirm availability status directly with the manufacturer or authorized distributors due to potential lifecycle changes.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-input voltage buck converter is required with through-hole assembly constraints. The adjustable output feature allows flexibility for various voltage rails within the 1.23V to 57V range. Consider the thermal performance of the TO-220 package for heat dissipation requirements. Verify that the 1A output current meets the load demands under all expected operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of SIMPLE SWITCHER regulators, known for their ease of use and robust performance. The HVT designation indicates a high-voltage variant capable of accepting inputs up to 60V. The ADJ suffix denotes an adjustable output version, while the T suffix specifies the through-hole TO-220 package type. This series is widely used in industrial and commercial power supplies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2575HVT-ADJ/NOPB for lead-free compliance. Other variants like LM2575HVS-ADJ offer surface-mount options but require PCB layout adjustments. Ensure any substitute maintains the same 60V input rating and 1A current capacity.