LM2575-5.0BU

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575-5.0BU is a monolithic integrated circuit step-down switching regulator manufactured by Microchip Technology, designed for high-efficiency DC-DC conversion. It operates with an input voltage range of 4V to 40V and provides a fixed 5V output capable of driving up to 1A load current. The device utilizes a fixed 52kHz internal oscillator and incorporates frequency compensation, eliminating the need for external compensation components. Key electrical parameters include a maximum junction temperature of 125°C and operation within a -40°C to 85°C ambient temperature range. The TO-263-5 package facilitates thermal management through direct PCB copper connection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation for simplified design
• Includes built-in current limiting and thermal shutdown protection mechanisms
• Requires minimal external component count for standard buck converter configurations

Voltage Regulators - DC DC Switching Regulators Applications

• Efficient step-down switching regulators
• Pre-regulators for linear post-regulator circuits
• Positive-to-negative voltage inversion converters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'BU' against official Microchip documentation to confirm exact package type and temperature grade, as datasheets may list variations like WU or SX. Ensure compatibility with required operating temperature ranges and check for RoHS compliance status in the latest product change notices before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output at 1A is required from a wide input voltage range. Consider the TO-263-5 package for applications needing robust thermal dissipation without additional heatsinks. Evaluate the 52kHz switching frequency against EMI constraints and inductor size requirements compared to higher-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of switching regulators, which are widely used for replacing linear regulators to reduce heat dissipation and improve efficiency. The series offers various fixed voltage outputs and adjustable versions across different package styles, serving as a standard solution for general-purpose power supply designs in industrial and consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2592HVS-5.0/NOPB (Texas Instruments) is documented as a similar alternative.