LM2597M-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2597M-3.3/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a step-down voltage regulator with a fixed 3.3 V output and 0.5 A maximum current capability. It operates at a switching frequency of 150 kHz and supports an input voltage range of 4.5 V to 40 V. The device is housed in an SOIC-8 surface-mount package and features a shutdown pin for low standby current consumption. It is designed for efficient DC/DC conversion within an operating temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller and power switch for simplified design
• Fixed 150 kHz switching frequency enables compact external component sizing
• Internal thermal shutdown protection safeguards against overheating
• Dedicated shutdown pin allows for low-power standby operation

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for digital logic circuits
• Pre-regulator stages for switching regulators
• Battery-powered systems requiring efficient voltage stepping
• General-purpose DC/DC conversion in industrial equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer specifications. Confirm the 'M' designation corresponds to the SOIC-8 package variant. Ensure the fixed 3.3 V output version matches the target circuit requirements, distinguishing it from adjustable or other fixed voltage variants within the LM2597 family. Cross-reference datasheet revisions for any updates to electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required with up to 0.5 A load current. The 40 V maximum input rating suits applications with higher supply voltages compared to standard 5 V tolerant devices. Consider the 150 kHz frequency for balancing efficiency and passive component size. Verify that the SOIC-8 package thermal performance meets the application's dissipation needs under expected load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2597 series of SIMPLE SWITCHER converters, which are widely used for efficient step-down voltage regulation. The LM2597M-3.3/NOPB specifically provides a fixed 3.3 V output, differentiating it from adjustable (ADJ) or other fixed voltage versions like 5.0 V or 12 V. It shares core architecture with the LM2597HV series but is optimized for lower input voltage ranges up to 40 V.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM2597M-3.3/NOPB equivalents from other manufacturers if pin-compatible. Adjacent variants such as LM2597M-5.0/NOPB or LM2597M-ADJ/NOPB offer different fixed outputs or adjustability. For higher input voltage requirements, consider the LM2597HV series. Always verify thermal and electrical parameters match before substitution.