LM2574BWM TR

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574BWM TR is a monolithic integrated circuit step-down (buck) switching regulator manufactured by Micrel Inc. It operates with a fixed internal oscillator frequency of 52 kHz and provides a guaranteed output current capability of 0.5 A. The device supports a wide input voltage range up to 40 V and includes built-in thermal shutdown and current limit protection features. It is housed in an 8-SOIC surface-mount package and requires minimal external components for implementation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates all active circuitry necessary for buck converter design
• Includes thermal shutdown and current limit protection
• Features low power standby mode with typical current under 200 µA

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 as Micrel Inc. or Microchip Technology, noting that Micrel was acquired by Microchip. Confirm the specific suffix 'TR' indicates tape and reel packaging if required for automated assembly. Check RoHS compliance status as datasheets may vary by production era. Ensure the part number matches the exact voltage version needed, as the base model covers multiple outputs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed-frequency 52 kHz buck topology is required with a maximum input voltage of 40 V. It is suitable for applications needing a compact 8-SOIC footprint and guaranteed 0.5 A continuous output current. Consider the low standby current for battery-powered systems requiring efficient power management.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574 family of simple, easy-to-use switching voltage regulators. The family offers various fixed output voltages including 3.3V, 5V, and 12V, alongside adjustable versions. The LM2574 series is designed to minimize external component count while providing robust protection features for general-purpose DC-DC conversion.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM2574 variants from Texas Instruments or onsemi, such as LM2574-5.0/NOPB or LM2574N-5G, provided the pinout and electrical specifications align with the system requirements.