LM2576BT

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576BT is a step-down switching regulator IC manufactured by Microchip Technology, housed in a TO-220-5 through-hole package. It operates as a buck converter with an adjustable output voltage range from 1.23V to 37V and supports a maximum output current of 3A. The device accepts an input voltage between 4V and 40V, utilizing a fixed internal switching frequency of 52kHz. It features a positive single output configuration and is rated for junction temperatures ranging from -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed 52kHz oscillator and internal 1.23V reference for simplified external component requirements
• Includes comprehensive protection mechanisms such as current limiting and thermal shutdown
• Provides external control capability for synchronization or standby mode operation

Voltage Regulators - DC DC Switching Regulators Applications

• Embedded microcontroller unit (MCU) power supply regulation
• Direct-in-line regulation prior to post-regulation stages
• Efficient battery-powered systems requiring high conversion efficiency

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'BT' against the official Microchip datasheet to confirm pinout and electrical specifications match design requirements. Note that this part number may be listed as obsolete or discontinued in certain distributor catalogs; ensure availability of valid replacement components before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, high-current buck regulator is needed for through-hole assembly. The TO-220-5 package facilitates effective heat dissipation for continuous 3A loads. Ensure the application input voltage remains within the 4V to 40V limit and that the required output voltage falls within the 1.23V to 37V adjustable range.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2576 series represents a family of monolithic integrated circuits designed for efficient step-down DC-DC conversion. The LM2576BT variant specifically denotes the adjustable output version within this lineup, offering flexibility in setting output voltages via external resistors while maintaining the core performance characteristics of the broader series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576WT is documented as a direct substitute by Microchip Technology.