LM2576HVT-15/LB03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576HVT-15/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 provides a fixed 15V output at up to 3A load current. The device utilizes a buck topology with a typical switching frequency of 52kHz. It is housed in a 5-pin TO-220 package suitable for through-hole mounting. The component supports an operating junction temperature range from -40°C to +125°C and includes internal features such as a shutdown pin and thermal regulation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch capable of delivering 3A output current
• Fixed 15V output voltage option within the high-voltage series
• Internal frequency compensation simplifies external component requirements
• Built-in thermal shutdown protection safeguards against overheating

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring high input voltage tolerance
• Pre-regulators for downstream switching regulators
• Battery-powered systems with wide input voltage variations
• Industrial control equipment power management

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific LB03 suffix configuration against the manufacturer's latest datasheet to confirm pinout and marking details. Ensure the procurement channel provides genuine Texas Instruments components to avoid counterfeit risks. Check for RoHS compliance status if required by your assembly process. Confirm availability of the through-hole TO-220 package variant rather than surface-mount alternatives.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 15V output is required from a high-voltage source up to 60V. It is appropriate for designs needing 3A continuous current with minimal external passive components. Consider the TO-220 package for adequate heat dissipation without additional heatsinking in moderate load conditions. Evaluate the 52kHz switching frequency against electromagnetic interference constraints in your specific application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV family of SIMPLE SWITCHER regulators, which are known for low component count and ease of design. The 'HVT' designation indicates high-voltage transistor capability, while 'LB03' specifies the particular package and tape/reel or tube configuration variant. It serves as a robust solution for replacing linear regulators in high-dissipation scenarios.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2576HVT-15/NOPB is a confirmed lead-free alternative within the same functional family. Verify that the NOPB version maintains identical electrical characteristics and pin compatibility before substitution.