LM2595SX-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2595SX-12 is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, operating at a fixed 150 kHz switching frequency. It provides a regulated 12 V output with a maximum load current of 1 A. The device accepts an input voltage range from 4.5 V to 40 V and features a typical quiescent current of 5 mA. Designed for surface-mount applications, it utilizes a TO-263-5 package (TO-263 variant) and supports operation across a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic buck converter topology for efficient DC-DC step-down conversion
• Fixed 12 V output configuration eliminates external feedback resistor network requirements
• Built-in thermal shutdown and current limiting protection mechanisms
• High-frequency 150 kHz switching enables the use of compact passive components

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power architectures
• Pre-regulation stages for linear post-regulators
• Battery-powered systems requiring efficient voltage stepping
• Industrial control equipment power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific part number matches the required suffix, as variations exist between fixed voltage outputs and adjustable versions within the LM2595 family. Confirm the manufacturer origin, noting that National Semiconductor's power management assets were acquired by Texas Instruments. Ensure compliance with RoHS and REACH standards if applicable to your manufacturing process. Cross-reference the datasheet revision date to ensure all electrical characteristics align with your design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a stable 12 V rail is needed from a higher voltage source up to 40 V. The 1 A current rating suits moderate load applications where efficiency is prioritized over size. Consider the TO-263 package for its thermal dissipation capabilities compared to smaller SMD options. Evaluate the 150 kHz frequency against EMI constraints, as lower frequencies allow for larger inductors but may require more filtering.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2595 series of SIMPLE SWITCHER regulators, which are designed for ease of use with minimal external components. Unlike the LM2596 series which offers 3 A capability, the LM2595 is optimized for 1 A loads. The 'SX' designation indicates the surface-mount TO-263 package variant, while '-12' specifies the fixed 12 V output version, distinguishing it from adjustable or other voltage variants.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2595S-12/NOPB
• LM2595SX-12

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM2595SX-12 require external resistors to set the output voltage?

No, the '-12' suffix indicates a fixed 12 V output version, so no external feedback resistors are needed.

What is the maximum input voltage for this regulator?

The maximum input voltage is 40 V.