LM4576R-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM4576R-5.0 is a monolithic integrated circuit step-down switching regulator manufactured by TAEJIN Technology (HTC Korea). It provides a fixed 5.0V output voltage and guarantees a 3.0A load current capability with excellent line and load regulation. The device operates at a fixed internal oscillator frequency of 52kHz, requiring only four external components for implementation. It features an input voltage range suitable for standard bus voltages and includes thermal shutdown and current limit protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 5.0V output version available within the series
• Guaranteed 3.0A output load current drive capability
• Internal 52kHz fixed frequency oscillator
• Integrated thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Simple high-efficiency step-down (buck) regulators
• On-card switching regulators
• Positive to negative converters (buck-boost)
• Power supply for battery chargers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'R' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the part number corresponds to the 5.0V fixed output variant. Cross-reference the manufacturer designation TAEJIN or HTC Korea to ensure component authenticity and correct revision level before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5.0V output is required with up to 3.0A continuous current. The 52kHz switching frequency allows the use of readily available standard inductors compared to higher-frequency alternatives. Consider the TO-252 package if surface mount is preferred over through-hole options like TO-220.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM4576 series belongs to the Simple Switcher family of buck converters designed for easy design integration. Unlike the LM1501B which operates at 300kHz, this series utilizes a lower 52kHz frequency. The R suffix typically denotes a specific package configuration, such as the TO-252 (D-PAK), distinguishing it from other package variants in the product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include the LM2576-5.0 from National Semiconductor or ON Semiconductor. Verify that replacement parts maintain the 3.0A current rating and 52kHz operating frequency to ensure electrical compatibility.