LM2574N-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2574N-5.0/NOPB is a Texas Instruments SIMPLE SWITCHER® step-down voltage regulator designed for high-efficiency power conversion. It operates with an input voltage range of 4V to 40V, delivering a fixed 5V output at up to 500mA. The device utilizes a 52kHz internal oscillator and features a TO-220 package. Key electrical parameters include a maximum quiescent current of 5mA and an operating temperature range from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic switching regulator requiring minimal external components
• Fixed 52kHz internal oscillator eliminates need for external timing resistors
• Built-in thermal shutdown and current limit protection circuits

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulator stages for switching regulators
• Direct regulation from bus voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' confirms lead-free status and RoHS compliance. Ensure the 'N' designation matches the required through-hole TO-220 package variant rather than surface-mount options. Cross-reference the manufacturer datasheet to confirm the specific output tolerance and thermal characteristics for your application environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from higher voltage rails. Consider the 500mA current limit and 40V maximum input rating. Evaluate thermal dissipation requirements due to the linear drop-out nature during heavy loads or high input voltage differentials compared to adjustable variants.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2574xx series of SIMPLE SWITCHER regulators. It serves as a fixed-voltage alternative within the family, offering a simpler design path compared to adjustable models like the LM2574ADJ. The series is characterized by its ease of use and robust protection features for general-purpose DC-DC conversion.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2574N-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum input voltage for the LM2574N-5.0?

The minimum input voltage is 4V.

Does the LM2574N-5.0 support external synchronization?

No, it uses a fixed 52kHz internal oscillator and does not support external clocking.