LM2574BWM

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574BWM is a switching voltage regulator from the LM2574 family, manufactured by Micrel Inc. It operates as a step-down (buck) converter with a fixed 52kHz internal oscillator frequency. The device supports an input voltage range up to 40V and provides a guaranteed output current of 0.5A. It includes thermal shutdown and current limit protection features.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-efficiency buck regulator topology
• Fixed 52kHz internal oscillator for simplified design
• Built-in thermal shutdown and current limiting protection

Voltage Regulators - DC DC Switching Regulators Applications

• Simple high-efficiency step-down regulators
• Efficient pre-regulators for linear regulators
• On-card switching regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as the LM2574 series has been produced by multiple vendors including Texas Instruments, onsemi, and Microchip. Confirm that the specific part number corresponds to Micrel Inc. documentation rather than other manufacturers' datasheets to ensure accurate pinout and electrical specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed-frequency 0.5A buck converter is required with an input voltage up to 40V. The wide input voltage range and integrated protection features make it suitable for general-purpose power supply designs where efficiency and component count reduction are priorities.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2574 family of easy-to-use switching voltage regulators. The family offers various fixed output voltage versions and an adjustable variant, designed to minimize external component requirements while providing robust performance in DC-DC conversion applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Cross-reference with LM2574 variants from other manufacturers such as TI or onsemi, ensuring package compatibility and verifying that the replacement part meets the same 0.5A output current and 40V input voltage specifications.