LM2575T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-3.3G is a monolithic integrated circuit step-down switching regulator from the LM2575 series, manufactured by onsemi. It provides a fixed 3.3V output with a maximum load current of 1A. The device operates within an input voltage range of 4.75V to 40V and utilizes a buck topology at a typical switching frequency of 52kHz. Designed for through-hole installation in a TO-220-5 package, it supports junction temperatures from -40°C to 125°C. Key electrical specifications include ±4% output voltage accuracy and 75% efficiency under standard conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation to minimize external component requirements.
• Includes built-in thermal shutdown and per-cycle current limiting for robust fault protection.
• Offers low standby current via an external shutdown pin capability.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring efficient step-down conversion
• Pre-regulators for linear post-regulator circuits
• Efficient buck converters replacing traditional three-terminal linear regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., G) against the manufacturer's latest datasheet to confirm RoHS compliance status and exact pinout configuration. Cross-reference ordering information directly with onsemi official documentation to ensure compatibility with design specifications before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with up to 1A load capacity. Ensure the application input voltage remains within the 4.75V to 40V range. Consider the TO-220-5 through-hole package constraints and verify that the 52kHz switching frequency aligns with electromagnetic interference requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of SIMPLE SWITCHER regulators, designed as high-efficiency alternatives to linear regulators. The series includes adjustable versions and other fixed voltage outputs, sharing common internal architectures but differing in output settings and packaging options across manufacturers like Texas Instruments and onsemi.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-3.3/NOPB by Texas Instruments serves as a direct functional substitute with identical electrical characteristics and pinout compatibility.