LM2576T-ADJG

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576T-ADJG is a monolithic integrated circuit switching regulator from the LM2576 series, designed for step-down (buck) converter applications. It supports an input voltage range of 4V to 40V and delivers a maximum output current of 3A. The device features an adjustable output voltage ranging from 1.23V to 37V, controlled via an internal reference voltage of approximately 1.23V. Operating at a fixed switching frequency of 52kHz, it utilizes pulse width modulation for regulation. The component is housed in a TO-220-5 through-hole package and operates within a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3.0A power switch with excellent line and load regulation capabilities
• Utilizes a fixed 52kHz switching frequency to minimize external component size
• Features internal frequency compensation for simplified circuit design
• Includes thermal shutdown protection for enhanced operational safety

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring buck conversion
• Pre-regulators for linear post-regulator circuits
• Efficient battery-powered DC-to-DC converters
• Standard 5V logic supply stepping down from higher voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific manufacturer origin, as onsemi acquired National Semiconductor assets which may affect part marking or datasheet versioning. Confirm RoHS compliance status and lead-free finish specifications against the latest official documentation. Ensure the TO-220-5 package dimensions match your PCB footprint requirements. Cross-reference the exact suffix codes to confirm the adjustable variant and packaging type.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, high-current buck converter is needed with minimal external support components. The fixed 52kHz frequency allows for smaller inductors compared to lower-frequency alternatives. Ensure adequate heatsinking is provided for the TO-220 package due to thermal dissipation requirements under high load conditions. Verify that the input voltage remains within the specified 4V to 40V range to prevent malfunction.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2576 family of switching regulators, widely recognized for their ease of use and reliability in industrial and commercial power supplies. The 'T' suffix indicates a through-hole package, while 'ADJ' denotes the adjustable output version. The 'G' suffix typically signifies Green/RoHS-compliant packaging. This series serves as a foundational solution for efficient voltage reduction in various electronic systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576T-ADJ/NOPB by Texas Instruments offers parameter equivalence. LM2575T-ADJG by onsemi provides similar functionality but with different input voltage characteristics.