LM2576BU

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576BU is a monolithic integrated circuit providing active functions for a step-down (buck) switching regulator. It operates as a non-synchronous DC-DC converter with an input voltage range of 4V to 40V and delivers up to 3A output current. The device features a fixed 52kHz switching frequency, enabling the use of small inductors and capacitors. It includes internal frequency compensation and a 1.23V reference voltage for precise regulation. The component is housed in a TO-263-6 (D2Pak) package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated buck switching regulator topology
• Fixed 52kHz switching frequency operation
• Internal frequency compensation circuitry
• Wide input voltage capability

Voltage Regulators - DC DC Switching Regulators Applications

• Servo drive systems
• Digital display devices
• Linear guide control circuits
• Ball screw pair actuation systems
• Computer application technology power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors or certified partners. Confirm the specific suffix indicates the TO-263-6 package variant. Check for RoHS compliance status as older manufacturing runs may differ from current specifications. Ensure storage conditions meet semiconductor handling standards to prevent moisture sensitivity damage prior to assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part for applications requiring a simple, non-synchronous step-down conversion with high input voltage tolerance. The fixed 52kHz frequency allows for compact passive component selection compared to lower-frequency alternatives. Consider thermal management requirements due to the TO-263-6 package's power dissipation characteristics under heavy load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2576 series of SIMPLE SWITCHER power converters. The series provides a complete solution for step-down voltage regulation. The BU suffix specifically denotes the D2Pak (TO-263-6) surface-mount package variant, distinguishing it from through-hole options like the TO-220 packages found in other series members.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the LM2576WU from Microchip Technology. Cross-manufacturer equivalents such as the LM2576T-ADJ/NOPB from Texas Instruments offer parameter equivalence. Verify pinout compatibility and thermal performance when transitioning between these specific part numbers.