LM2574M-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574M-ADJ is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a 0.5A step-down voltage regulator. It utilizes a fixed-frequency current-mode architecture to simplify external compensation and filter design. The device integrates a high-voltage power switch capable of handling input voltages up to 40V. It supports adjustable output voltages ranging from 1.23V to 37V using external resistors. The component operates with a typical switching frequency of 52kHz and includes internal thermal shutdown and current limiting for robust protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage power switch rated for 40V input operation
• Employs fixed-frequency current-mode control architecture
• Features internal thermal shutdown and cycle-by-cycle current limiting
• Supports adjustable output voltage configuration via external feedback network

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring buck conversion
• Pre-regulator circuits for switching regulators
• Efficient linear regulator replacements in low-power applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and tape-and-reel or tube packaging options available from authorized distributors. Confirm RoHS compliance status indicated by NOPB suffix if required. Ensure the supplier provides valid traceability documentation for quality assurance purposes before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an adjustable output voltage is required within the 40V input range. It is suitable for designs needing 0.5A continuous load current with simplified compensation due to current-mode control. Consider the SOIC-14 package constraints for thermal management and PCB layout space compared to through-hole alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574 family of SIMPLE SWITCHER regulators. It shares architectural similarities with fixed-output variants like the LM2574-5.0 but offers flexibility through its adjustable pin configuration. The M suffix denotes the SOIC-14 surface-mount package variant, distinguishing it from the N (PDIP) or HV series components.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM2574M-ADJ variants from Texas Instruments or National Semiconductor. Cross-reference with LM2574M-ADJ/NOPB for lead-free equivalents. Verify pin compatibility and thermal performance when replacing with similar buck converters from different manufacturers.