LM2576-3.3BU

Description：IC REG BUCK 3.3V 3A TO263-5
Series：-
Mfr：Microchip Technology
Package：Bulk

SKU:4835db05c356 Category: Voltage Regulators - DC DC Switching Regulators Brand: Microchip Technology

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

LM2576-3.3BU is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists Microchip Technology. Its product description is IC REG BUCK 3.3V 3A TO263-5. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for LM2576-3.3BU

Description：IC REG BUCK 3.3V 3A TO263-5
Series：-
Mfr：Microchip Technology
Package：Bulk
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Fixed
Number of Outputs：1
Voltage - Input (Min)：4V
Voltage - Input (Max)：40V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：-
Current - Output：3A
Frequency - Switching：52kHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package：TO-263-5
Grade：-
Qualification：-

Voltage Regulators - DC DC Switching Regulators datasheet and documents for LM2576-3.3BU

LM2576-3.3BU

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576-3.3BU is a monolithic integrated circuit providing step-down (buck) switching regulator functions from Microchip Technology. It delivers a fixed 3.3V output with a guaranteed 3A load capability. The device operates within an input voltage range of 4V to 40V and utilizes a 52kHz internal oscillator. It features thermal shutdown and current limit protection, requiring minimal external components for implementation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Fixed 3.3V output voltage with ±3% maximum tolerance under specified line and load conditions
Integrated 52kHz fixed-frequency internal oscillator reduces external component count
Built-in thermal shutdown and current limit protection circuits ensure operational safety

Voltage Regulators - DC DC Switching Regulators Applications

Simple high-efficiency step-down (buck) regulators
Efficient pre-regulators for linear regulators
On-card switching regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the obsolete status of this part number before procurement planning. Confirm availability through authorized distributors or secondary markets as original manufacturing may have ceased. Ensure compatibility with existing PCB footprints and validate that alternative sources meet required quality standards for critical applications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring a fixed 3.3V rail from inputs up to 40V. It suits applications prioritizing low external component counts and robust protection features. Consider the TO-225 package constraints for thermal management in high-current scenarios compared to surface-mount alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 series of SIMPLE SWITCHER regulators, originally developed by National Semiconductor and now maintained by Microchip Technology. The series includes adjustable and other fixed voltage variants, establishing a standard for simple buck converter implementations in industrial and consumer electronics.