LM2574MX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574MX-ADJ/NOPB is a SIMPLE SWITCHER® 0.5A step-down voltage regulator from Texas Instruments, housed in an SOIC-Wide-14 surface-mount package. It operates with an input voltage range of 4V to 40V and delivers a continuous output current of 500mA. The adjustable output voltage spans from 1.23V to the input rail. Designed for high efficiency, it features a fixed internal switching frequency of 52kHz. The device supports operation across an extended temperature range from -40°C to +125°C and includes built-in thermal shutdown and current limiting protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch eliminates the need for external components typically required in discrete designs.
• Fixed 52kHz switching frequency allows for the use of small inductors and capacitors.
• Built-in thermal shutdown and current limit protection ensure robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Efficient buck conversion for battery-powered equipment
• Pre-regulation stages for linear post-regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the SOIC-14 package dimensions align with your PCB footprint constraints. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference the ordering information section for accurate part identification before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, non-isolated DC-DC solution is needed for inputs up to 40V. The adjustable output variant offers flexibility for various load requirements without changing the IC. Consider the 52kHz frequency trade-off between component size and electromagnetic interference. Evaluate thermal performance based on the expected ambient temperature and board copper area available for heat dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574 family of SIMPLE SWITCHER regulators, designed for simplicity and ease of implementation. It serves as a direct replacement for older discrete switching solutions or legacy regulators requiring similar current capabilities. The MX suffix indicates the wide-body SOIC package, distinguishing it from through-hole or smaller surface-mount variants within the same functional family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2574M-ADJ/NOPB shares identical functionality and pinout but uses a standard SOIC-14 package instead of the wide-body variant. LM2596 series devices offer higher current capacity but operate at different frequencies. Verify that substitute parts maintain compatible input voltage ranges and thermal characteristics for your specific application environment.