LM2597M-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2597M-12/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, designed for high-efficiency step-down and inverting voltage regulation. It operates at a fixed switching frequency of 150 kHz, enabling the use of small external components. The device provides a fixed 12 V output with a maximum output current capability of 500 mA. It accepts an input voltage range from 4.5 V to 40 V. Integrated features include a 5 mA quiescent current, thermal shutdown protection, and a shutdown pin for standby control. The component is housed in an SOIC-8 surface-mount package and is rated for operation between -40°C and +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller supporting buck and inverting topologies
• Fixed 150 kHz switching frequency minimizes passive component size
• Built-in thermal shutdown and current limit protection
• Dedicated shutdown pin enables low-power standby modes

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Inverting power supply generation
• Pre-regulation for downstream linear regulators
• Battery-powered equipment efficiency improvement

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific part number suffix matches the required configuration, as variations exist within the family. Confirm RoHS compliance status through official documentation. Ensure the SOIC-8 package variant aligns with PCB footprint requirements. Cross-reference the datasheet revision to confirm parameter consistency before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from a wide input range up to 40 V. The 500 mA current rating suits moderate load applications. Consider the 150 kHz frequency for balancing component size and efficiency. Evaluate thermal performance based on expected ambient temperatures and load currents within the specified operating range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2597 series of SIMPLE SWITCHER converters. It shares architectural similarities with the LM2594 but supports additional inverting topology configurations. The series is characterized by internal compensation and fixed-frequency operation, simplifying design implementation compared to adjustable counterparts.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2597M-12/NOPB serves as the direct lead-free replacement for older non-NOPB variants. Verify pin compatibility and thermal characteristics when substituting with other buck regulators.