LM2574M-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574M-ADJ/NOPB is a SIMPLE SWITCHER® 0.5A step-down voltage regulator from Texas Instruments, housed in a 14-pin SOIC-Wide package. It operates with an input voltage range of 4V to 40V and delivers up to 500mA output current. The device features an adjustable output voltage controlled by external feedback resistors, with a typical switching frequency of 52kHz. It includes internal thermal shutdown and current limiting for protection, supporting operation across a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller for simplified design
• Fixed-frequency operation at approximately 52kHz
• Built-in thermal shutdown and current limit protection
• Adjustable output voltage via external resistor network

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulation for switching regulators
• Efficient straight-through DC/DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and marking against the official Texas Instruments datasheet to confirm the adjustable variant. Ensure the component matches the SOIC-14 package dimensions and pinout configuration required for your PCB layout. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an adjustable output voltage is required within the 4V to 40V input range. It is suitable for applications needing 500mA current capability with high efficiency. Consider the SOIC-14 package for surface-mount assembly. Evaluate thermal performance requirements given the +125°C maximum operating temperature rating.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574 family of SIMPLE SWITCHER regulators, designed for easy implementation of step-down converters. The 'M' indicates a plastic small-outline package, while 'ADJ' specifies the adjustable output version. The '/NOPB' denotes a lead-free, halogen-free product compliant with RoHS standards, manufactured by Texas Instruments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2574MX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

How is the output voltage determined?

The output voltage is set by two external feedback resistors connected between the output, the feedback pin, and ground, according to the formula provided in the datasheet.

What is the typical switching frequency?

The typical switching frequency is 52kHz, which allows for the use of smaller inductors and capacitors compared to lower-frequency regulators.