LM2574M-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574M-5.0/NOPB is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, designed for high-efficiency DC-DC conversion. It operates with an input voltage range of 4 V to 40 V and provides a fixed 5 V output at up to 500 mA. The device utilizes a buck topology with a typical switching frequency of 52 kHz. Integrated features include a 1.23 V reference voltage, current limit protection, thermal shutdown, and a shutdown pin for low standby power consumption. It is housed in a 14-pin SOIC package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller and power switch for simplified design
• Fixed internal switching frequency reduces external component count
• Built-in thermal shutdown and current limit protection
• Dedicated shutdown pin enables low quiescent current operation

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Battery-powered systems requiring efficient step-down conversion
• General-purpose DC-DC power supplies
• Industrial control system power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' confirms lead-free and RoHS compliance. Confirm the 'M' designation indicates the SOIC-14 wide package variant. Ensure the '-5.0' suffix matches the required 5 V fixed output voltage. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required from an input source between 4 V and 40 V. It is suitable for applications needing moderate current capacity up to 500 mA. Consider the 52 kHz switching frequency for trade-offs between component size and efficiency. Evaluate thermal performance requirements based on the expected load current and ambient temperature conditions within the operating range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574xx series of SIMPLE SWITCHER regulators. It shares architectural similarities with other members like the LM2574-ADJ but offers a fixed output voltage option. The series is known for reducing design complexity by integrating the controller and power switch into a single IC, eliminating the need for external driver components.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2574M-5.0/NOPB serves as a direct replacement for older National Semiconductor versions. Verify pinout compatibility with existing designs. Check if alternative packages such as TO-263 or DIP are acceptable for mechanical constraints.