LM2576BU TR

Description：IC REG BUCK ADJ 3A TO263-5
Series：-
Mfr：Microchip Technology
Package：Tape & Reel (TR)

SKU:c60fbb0d1581 Category: Voltage Regulators - DC DC Switching Regulators Brand: Microchip Technology

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Product introduction

LM2576BU TR 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 ADJ 3A TO263-5. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for LM2576BU TR

Description：IC REG BUCK ADJ 3A TO263-5
Series：-
Mfr：Microchip Technology
Package：Tape & Reel (TR)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：4V
Voltage - Input (Max)：40V
Voltage - Output (Min/Fixed)：1.23V
Voltage - Output (Max)：37V
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 LM2576BU TR

LM2576BU TR

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576BU TR is a monolithic integrated circuit providing the active functions for a step-down (buck) switching regulator. It features a fixed 52kHz internal oscillator and an adjustable output voltage range from 1.23V to 37V. The device guarantees a 3A output current with excellent line and load regulation. It operates with a wide input voltage range of 4V to 40V. The component includes thermal shutdown and current limit protection circuits. It requires only four external components for operation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Integrated 52kHz fixed frequency internal oscillator
Guaranteed 3A output current capability
Wide input voltage range from 4V to 40V
Thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to negative converter (inverting Buck-Boost)

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging, as standard datasheets often list tube packaging. Confirm RoHS compliance status, as older LM2576 variants may not meet current environmental standards. Check for lead-free markings on the component body. Ensure the supplier provides valid traceability documentation for this discontinued or legacy part number.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple, cost-effective buck regulator is required for up to 3A loads. It is suitable for applications where a fixed 52kHz switching frequency is acceptable. Consider the TO-263 package for through-hole or surface-mount integration. Verify that the required output voltage falls within the 1.23V to 37V adjustable range if using the ADJ variant.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2576 series is a family of 3A step-down switching regulators originally developed by National Semiconductor. Microchip Technology acquired these assets and continues to support the product line. The LM2576BU TR specifically denotes the adjustable version in tape and reel packaging. It serves as a direct replacement for many legacy linear regulators in power supply designs.