LM2597N-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2597N-3.3/NOPB is a fixed-output step-down switching regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates at a 150 kHz switching frequency and delivers a fixed 3.3 V output with a maximum current of 0.5 A. The device supports an input voltage range up to 40 V and utilizes a buck topology. It is housed in an 8-pin PDIP package for through-hole mounting. The operational temperature range spans from -40°C to +125°C, ensuring reliability in industrial environments.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller simplifies design by reducing external component count
• Fixed 150 kHz internal oscillator eliminates need for external timing components
• Built-in thermal shutdown protects against overheating during fault conditions
• Standard 3.3 V output option removes requirement for feedback resistor networks

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems operating within wide input voltage ranges
• General-purpose power supplies utilizing through-hole mounting requirements

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm RoHS compliance status. Ensure the ordering part number matches the required package type, as the LM2597 series includes both surface-mount and through-hole variants. Confirm that the fixed 3.3 V output aligns with system requirements before procurement, as adjustable versions require external resistors.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required without external feedback programming. The through-hole PDIP package is suitable for prototyping or applications where surface-mount technology is not preferred. Consider the 0.5 A current limit and 40 V maximum input voltage to ensure compatibility with the target power supply architecture.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2597 series of SIMPLE SWITCHER power converters. The series provides a complete solution for step-down voltage regulation, integrating the controller, driver, and protection circuits on a single monolithic IC. The 'N' designation indicates the through-hole PDIP package variant, distinguishing it from surface-mount options like the SOIC or TO-263 packages available in the same family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2597N-3.3/NOPB