LM2576-3.3WT

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576-3.3WT is a monolithic integrated circuit step-down (buck) switching regulator from the LM2576 series, manufactured by Microchip Technology. It provides a fixed 3.3V output with a guaranteed maximum load current of 3A. The device operates with an input voltage range of 4V to 40V and utilizes a fixed-frequency internal oscillator at 52kHz. It features cycle-by-cycle current limiting and thermal shutdown for protection. The component is housed in a TO-220-5 package designed for through-hole mounting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 3.3V output voltage with high efficiency replacement for linear regulators
• Integrated 52kHz fixed-frequency oscillator and internal frequency compensation
• Built-in cycle-by-cycle current limiting and thermal shutdown protection

Voltage Regulators - DC DC Switching Regulators Applications

• Embedded control systems requiring stable MCU power supply
• General-purpose DC-DC step-down power supplies
• Battery-powered equipment requiring efficient voltage regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'WT' against the official Microchip datasheet to confirm the package type and temperature rating. Ensure compatibility with through-hole assembly processes. Check for RoHS compliance status as indicated in the manufacturer's documentation before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with up to 3A load capacity. It serves as a direct alternative to linear regulators like the 78L33, offering significantly higher efficiency and reduced heat dissipation requirements. Suitable for designs where a 52kHz switching frequency and TO-220-5 packaging are acceptable constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2576 series represents a family of SIMPLE SWITCHER power converters designed to simplify switch-mode power supply design. The LM2576-3.3WT specifically refers to the adjustable-input, fixed-3.3V-output variant within this lineup, distinguished by its through-hole TO-220-5 form factor suitable for prototyping or applications requiring robust thermal management via heatsinking.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576WT (Adjustable version requires external resistor network). LM2576T-3.3G (onsemi equivalent). LM2576T-ADJ/NOPB (Texas Instruments adjustable equivalent).