LM2576-12BU

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576-12BU is a monolithic integrated circuit functioning as a step-down (buck) switching regulator. It provides a fixed 12V output with a maximum current of 3A. The device accepts an input voltage range from 4.0V to 40.0V and operates at a maximum switching frequency of 52 kHz. It features guaranteed +/- 4% tolerance on the output voltage within specified conditions. The component utilizes TO-263-6 packaging and supports through-hole installation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated buck switching regulator topology for efficient voltage step-down
• Fixed 12V output voltage with high load drive capability
• Internal frequency compensation and oscillator reduce external component count
• Wide input voltage range accommodates various power sources

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring stable 12V rails
• Embedded systems and microcontroller power supplies
• Battery-powered equipment charging circuits
• General-purpose DC-DC conversion modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as Microchip acquired assets from former producers like National Semiconductor and Micrel. Confirm the specific package variant matches the required PCB footprint. Check for RoHS compliance status relative to the production date. Ensure the fixed 12V output aligns with system requirements, as adjustable versions exist in the series. Validate thermal performance under expected load conditions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 12V output is required without external feedback programming. Consider the 3A current limit for load demands. Evaluate the TO-263-6 package for thermal dissipation needs compared to smaller alternatives. Verify that the 52 kHz switching frequency fits EMI constraints. Compare against adjustable variants if precise voltage trimming is necessary.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2576 series represents a family of SIMPLE SWITCHER power converters known for ease of use and robust performance. The -12BU suffix specifically denotes the fixed 12V output version in the TO-263-6 (D2PAK-5) package. This component is widely used in legacy and modern designs due to its simplicity and reliability in buck converter applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576-12ADJ: Adjustable output variant requiring external resistors. LM2576HV-12: High-voltage input version supporting up to 60V. LM2596-ADJ: Higher frequency alternative with similar functionality but different pinout.