LM2576S-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576S-12 is a SIMPLE SWITCHER 3A Step-Down Voltage Regulator manufactured by UMW. It operates as a fixed-output buck converter with a nominal output voltage of 12V and a maximum output current of 3A. The device supports an input voltage range up to 40V or 57V depending on the specific variant documentation, utilizing a TO-263-5L surface-mount package. It features a switching frequency of 52kHz and includes internal compensation for minimal external component requirements. The regulator offers thermal shutdown and current limiting protection, operating within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for improved efficiency
• Fixed 12V output configuration simplifies design
• Internal thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Pre-regulators for post-switching regulators
• Efficient step-down conversion from higher bus voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer datasheet for exact input voltage limits (40V vs 57V) as specifications vary between standard and high-voltage variants. Confirm the package type matches the PCB footprint, specifically TO-263-5L. Ensure compliance with RoHS3 standards if required by the end application. Cross-reference ordering information with official distributor catalogs to avoid counterfeit components.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output at up to 3A is required from an input voltage exceeding 12V. The TO-263-5L package is suitable for applications requiring moderate heat dissipation without additional heatsinking in many scenarios. Consider the 52kHz switching frequency for balancing component size and efficiency. Verify that the input voltage does not exceed the absolute maximum rating specified in the specific UMW datasheet version.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576HV series of SIMPLE SWITCHER regulators, designed for high-efficiency step-down applications. The 'S' suffix typically denotes the surface-mount TO-263 package, while '-12' indicates the fixed 12V output voltage. UMW produces this component as a compatible alternative to original semiconductor designs, maintaining pinout and functional compatibility with industry-standard equivalents.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2576HVS-12/NOPB
• LM2576S-12/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the switching frequency of the LM2576S-12?

The typical switching frequency is 52 kHz.

Does the LM2576S-12 include protection features?

Yes, it includes thermal shutdown and current limiting protection.