LM2575T-ADJ/LB03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-ADJ/LB03 is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, designed for through-hole mounting in TO-220 packages. It supports an input voltage range of 4V to 60V and delivers up to 1A output current. The adjustable output voltage ranges from 1.23V to 57V. Operating at a fixed switching frequency of 52kHz, the device achieves typical efficiencies of 77%. It functions within an ambient temperature range of -40°C to 125°C and includes internal thermal shutdown and current limiting features.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch rated for 1A continuous load current
• Fixed 52kHz switching frequency eliminates need for external oscillator components
• Internal compensation circuitry simplifies design and reduces component count
• Built-in thermal shutdown and cycle-by-cycle current limiting for protection

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring buck conversion
• Pre-regulators for downstream switching regulators
• Efficient linear regulator replacements in battery-powered applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the LB03 suffix indicates specific tape-and-reel or tube packaging variations compared to standard LF variants. Confirm RoHS compliance status as some older TI batches may differ. Ensure the supplier provides genuine Texas Instruments documentation matching the exact part number to avoid counterfeit risks.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a through-hole solution is required for high-voltage input buck applications. Compare against LM2575S-ADJ for surface-mount needs. Consider the TO-220 package thermal resistance for heat dissipation requirements. Verify that the 52kHz frequency aligns with EMI constraints of the target system.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of SIMPLE SWITCHER regulators, which are widely used for efficient DC-DC conversion. The 'T' designation indicates a through-hole package, while 'ADJ' specifies an adjustable output voltage configuration. The LM2575 series is known for its simplicity and robustness in industrial and commercial power supplies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-ADJ/NOPB serves as a direct pin-compatible replacement with updated lead-free specifications. LM2575HVT-ADJ offers higher input voltage tolerance if system requirements exceed 60V. Ensure thermal management strategies remain consistent when substituting packages.