LM2576T-012

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576T-012G is a 3.0 A step-down switching regulator from onsemi, operating at a fixed 52 kHz frequency. It delivers a fixed 12 V output with an input voltage range of 4 V to 40 V. The device utilizes pulse-width modulation for efficient regulation and features internal current limiting and thermal shutdown protection. Packaged in a TO-220 five-pin through-hole configuration, it supports operation temperatures from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed 52 kHz oscillator and 1.23 V reference for simplified external component requirements
• Provides built-in thermal shutdown and current limit protection for enhanced circuit reliability
• Supports external control pin for low-power standby mode operation

Voltage Regulators - DC DC Switching Regulators Applications

• Local voltage regulation prior to the post-regulator stage
• Efficient buck converters for standard 5-V or 3.3-V systems
• Battery-powered switch-mode power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'G' indicates lead-free and RoHS compliance status as defined by onsemi standards. Confirm the package marking matches the TO-220 form factor. Ensure the ordering part number aligns with the fixed 12 V output variant rather than adjustable or other voltage versions. Cross-reference datasheet revision dates for accurate electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from inputs up to 40 V. It is suitable for applications needing up to 3 A continuous current with minimal external parts. Consider thermal management due to power dissipation at high load currents. Verify that the 52 kHz switching frequency fits within electromagnetic interference constraints of the target system design.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 series of simple switcher regulators. It shares architectural similarities with LM2576HV variants but operates with a lower maximum input voltage of 40 V compared to the HV series. The TO-220 package distinguishes it from surface-mount alternatives like the LM2576S series, offering higher thermal capacity for through-hole implementations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576T-12/NOPB (Texas Instruments) offers equivalent 3 A, 12 V fixed output specifications. LM2576TV-012G provides identical functional parameters under onsemi branding. Verify pinout compatibility and thermal resistance values when substituting between manufacturers.