LM2597MX-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2597MX-12 is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a step-down (buck) switching voltage regulator. It operates with a fixed internal oscillator at a frequency of 150 kHz and delivers a fixed output voltage of 12 V. The device supports an output current of up to 0.5 A and accepts input voltages ranging from 4.5 V to 40 V. Packaged in an 8-pin SOIC surface-mount format, it integrates a monolithic synchronous rectifier for high efficiency. The component is rated for operation within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a synchronous rectifier to eliminate the need for an external catch diode, thereby improving efficiency and reducing solution size.
• Features a fixed-frequency internal oscillator operating at 150 kHz, allowing the use of small, cost-effective standard inductors.
• Includes built-in thermal shutdown and current limit protection to ensure robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring efficient step-down conversion
• Pre-regulators for linear regulators to enhance overall system efficiency
• Battery-powered applications utilizing low quiescent current modes

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the package type matches the intended PCB footprint. Confirm RoHS compliance status if required by assembly standards. Cross-reference the part number with the latest revision history to identify any functional changes or obsolescence notices prior to procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from an input voltage between 4.5 V and 40 V. It is suitable for designs prioritizing high efficiency due to the integrated synchronous rectifier. Consider the 150 kHz switching frequency for balancing component size and electromagnetic interference. Ensure the load current does not exceed 0.5 A and that thermal management aligns with the specified junction temperature limits.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2597 family of SIMPLE SWITCHER converters, designed for straightforward implementation of DC-DC buck conversions. The 'MX' designation indicates an 8-pin SOIC surface-mount package variant. The '-12' suffix specifies the fixed 12 V output version, distinguishing it from adjustable or other voltage variants within the same series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult the manufacturer's product selection guide for direct replacements or pin-compatible alternatives. Verify that substitute components maintain equivalent input voltage ranges, output current capabilities, and package dimensions. Check for updated features such as lower quiescent current or enhanced thermal performance in newer generations.