LM2597M-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2597M-ADJ/NOPB is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, housed in an SOIC-8 surface-mount package. It operates with a fixed switching frequency of 150 kHz and supports an input voltage range of 4.5 V to 40 V. The device delivers a maximum output current of 500 mA with an adjustable output voltage ranging from 1.23 V to 37 V. It features integrated feedback compensation, thermal shutdown, and current limiting. The component functions within an ambient temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller for buck and inverting topologies
• Fixed 150 kHz internal oscillator reduces external component count
• Built-in thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation modules
• Pre-regulators for switching regulators
• Efficient step-down conversion from higher bus voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'M' indicates the SOIC-8 package variant when sourcing. Confirm the 'NOPB' designation ensures lead-free and RoHS compliance as per manufacturer specifications. Cross-reference the datasheet revision to ensure compatibility with design requirements. Validate that the adjustable output configuration matches the intended circuit feedback network.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring moderate current up to 500 mA with high efficiency. The fixed 150 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Ensure the input voltage does not exceed the 40 V absolute maximum rating. Consider the SOIC-8 thermal performance for the expected power dissipation levels in the target enclosure.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2597 family of SIMPLE SWITCHER regulators, designed for easy implementation of DC-DC converters. It serves as a cost-effective solution for general-purpose power management. The device integrates the switch, controller, and protection circuits into a single IC, simplifying the design process for engineers developing compact power supplies.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum adjustable output voltage?

The output voltage can be adjusted down to approximately 1.23 V using the internal reference voltage.

Does the device support inverting topology?

Yes, the LM2597M-ADJ/NOPB supports both buck (step-down) and inverting configurations.