LM2576-12WT

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576-12WT is a fixed-output step-down switching regulator manufactured by Microchip Technology. It operates with an input voltage range of 4 V to 40 V and provides a fixed 12 V output at a maximum current of 7.5 A. The device utilizes a buck topology with a switching frequency of 63 kHz. It is housed in a TO-220-5 (PSFM5) package designed for through-hole mounting. The component supports an operating temperature range from -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch capable of delivering high output current
• Fixed internal feedback network ensures stable regulated output voltage
• Built-in thermal shutdown circuitry protects against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring step-down conversion
• Pre-regulator circuits for linear regulators
• Efficient battery-powered applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific manufacturer designation, as historical data indicates variations between National Semiconductor and Microchip Technology sources for this part number. Confirm the package type matches the required PSFM5 or TO-220-5 footprint. Ensure the specified current rating aligns with the design requirements, noting discrepancies in available documentation regarding 3 A versus 7.5 A ratings. Check RoHS compliance status if environmental regulations apply to the final assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from a variable input source up to 40 V. The 63 kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal management capabilities of the TO-220-5 package for heat dissipation. Verify that the load current does not exceed the rated limit of the specific manufacturing batch.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2576 family of simple switcher regulators. It is designed to simplify the design of step-down DC-DC converters. The family typically includes adjustable versions and other fixed voltage outputs. The LM2576-12WT specifically targets applications needing a reliable 12 V rail with high current capability.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576T-12/NOPB