LM2575D2T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575D2T-3.3 is a monolithic integrated circuit from the SIMPLE SWITCHER series, functioning as a step-down (buck) switching voltage regulator. It provides a fixed 3.3V output capable of driving a 1A load with excellent line and load regulation. The device operates with an input voltage range up to 40V and utilizes a fixed-frequency internal oscillator at 52kHz. Packaged in a surface-mount SO-8 format, it requires minimal external components for operation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency 52kHz oscillator and internal frequency compensation to simplify design.
• Includes TTL shutdown capability for low power standby mode control.
• Provides thermal shutdown and cycle-by-cycle current limiting for fault protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load DC/DC conversion modules
• Pre-regulators for linear post-regulator circuits
• Efficient step-down power supplies for digital logic

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as the LM2575 family originates from Texas Instruments. Confirm that the specific 'onsemi' branding aligns with authorized distribution channels or legacy licensing agreements. Ensure the SO-8 package type matches the required PCB footprint and that the 3.3V fixed output variant meets the target voltage specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple, high-efficiency buck converter is needed for 1A loads. The fixed 3.3V output eliminates the need for external feedback resistors compared to adjustable versions. Consider the 52kHz switching frequency for standard inductor selection and the thermal performance requirements of the SO-8 package under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 series of monolithic integrated circuits designed for step-down switching regulators. The series is known for requiring only four external components. The 'D2T' suffix typically indicates a tape-and-reel surface-mount package variant, distinguishing it from through-hole TO-220 versions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible replacements include the LM2575T-3.3/NOPB and LM2575S-3.3. Verify that substitute parts maintain the same 52kHz switching frequency and 1A current rating to ensure compatibility with existing passive component selections.