LM2575T-12G

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575T-12G is a monolithic integrated circuit step-down switching regulator from the LM2575 series, manufactured by onsemi. It provides a fixed 12V output with a maximum load current of 1A. The device operates within an input voltage range of 4.75V to 40V and features a fixed internal oscillator frequency of 52kHz. Designed for through-hole mounting in a TO-220-5 package, it supports an operating junction temperature range from -40°C to +125°C. Key electrical characteristics include ±4% output voltage accuracy and typical efficiency up to 77%.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates all active functions required for a buck converter, including a fixed-frequency oscillator and internal feedback loop compensation.
• Includes built-in thermal shutdown and cycle-by-cycle current limiting to ensure system protection under fault conditions.
• Supports external shutdown control for low standby power consumption during inactive periods.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring efficient step-down conversion.
• Pre-regulator circuits for linear post-regulators.
• Efficient straight-through DC/DC converters.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'G' confirms RoHS compliance and halogen-free status as per onsemi standards. Confirm the package variant matches the TO-220-5 through-hole specification. Ensure the fixed 12V output version aligns with design requirements, distinguishing it from adjustable or other fixed voltage variants within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output at 1A is required with minimal external component count. It serves as a direct replacement for standard three-terminal linear regulators, offering significantly reduced heat dissipation requirements. Consider the 52kHz switching frequency for inductor selection and the wide input voltage range for varying supply conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of simple switchers, designed for ease of use in power management applications. The series is known for reducing solution size and cost compared to linear alternatives. The LM2575T-12G specifically targets applications needing reliable 12V regulation with robust protection features in a durable through-hole package.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575T-12/NOPB (Texas Instruments) offers equivalent specifications and functionality. Verify pinout compatibility and thermal performance when substituting between manufacturers.