LM2575-12WU-TR

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575-12WU-TR is a fixed-output step-down switching voltage regulator from the LM2575 series, manufactured by Microchip Technology. It provides a fixed 12 V output with a maximum load current of 1 A. The device operates from an input voltage range of 4 V to 40 V and utilizes a buck topology with a typical switching frequency of 52 kHz. It is housed in a TO-263-5 (D2PAK) surface-mount package. The component supports operation within a temperature range of -40°C to +85°C and includes internal features such as a 150 mA standby current supply and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch rated for 3.2 A peak current
• Fixed 12 V output option eliminates external resistor divider requirements
• Internal oscillator sets switching frequency at 52 kHz for compact passive design
• Built-in thermal shutdown protects against excessive junction temperatures

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Input voltage step-down for battery-powered devices
• Pre-regulation stages for linear regulators
• General-purpose DC-DC conversion in industrial control equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when ordering. Confirm the manufacturer is Microchip Technology, as Texas Instruments also produces compatible parts under similar naming conventions. Ensure the TO-263-5 package variant matches your PCB footprint requirements. Check RoHS compliance status if required for your manufacturing process. Validate that the fixed 12 V output aligns with your system's voltage rail specifications before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required without external feedback network adjustments. It is suitable for applications needing up to 1 A continuous load current with moderate efficiency requirements. Consider the 52 kHz switching frequency for balancing component size and EMI performance. Ensure the input voltage remains within the 4 V to 40 V range for proper regulation. Evaluate thermal management needs given the D2PAK package's power dissipation characteristics.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of simple switcher regulators, designed for ease of use and high efficiency. The LM2575 series offers various fixed output voltages and adjustable versions. The 'WU' designation typically refers to the TO-263 package style, while '-TR' denotes reel packaging. This family is widely used in commercial and industrial applications requiring reliable step-down conversion.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575-12WU is the non-reel equivalent from Microchip. LM2575T-12 is a through-hole alternative from Texas Instruments with similar electrical characteristics but different packaging. Verify pinout compatibility and thermal performance when substituting across manufacturers.