LM2576R-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576R-3.3 is a monolithic integrated circuit step-down switching regulator from the TAEJIN SIMPLE SWITCHER series, designed for easy design of buck converters. It provides a fixed 3.3V output capable of driving a 3.0A load with excellent line and load regulation. The device features a 52kHz fixed-frequency internal oscillator and requires only four external components. It supports a wide input voltage range and includes TTL shutdown capability for low-power standby modes.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fixed 3.3V output version within the SIMPLE SWITCHER series
• Capable of driving 3.0A loads with high efficiency
• Includes thermal shutdown and current limit protection
• Utilizes readily available standard inductors

Voltage Regulators - DC DC Switching Regulators Applications

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

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as TAEJIN Technology Co. may distribute or manufacture variants under this part number. Confirm RoHS compliance and moisture sensitivity levels against specific datasheets. Ensure the package type matches the intended PCB layout requirements before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required without external feedback resistors. It serves as a direct replacement for popular three-terminal linear regulators where size reduction and higher efficiency are priorities. Consider the 52kHz switching frequency for EMI constraints and ensure adequate heat dissipation for 3A loads.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 series of 3A step-down voltage regulators. The 'R' suffix typically indicates a specific package variant, often related to surface-mount configurations compared to through-hole versions like the TO-220. It is part of a widely used family of switching regulators known for simplicity and robustness in power management designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2576T-3.3 from onsemi and LM2576-3.3 from Texas Instruments. Verify pinout compatibility and thermal performance characteristics when swapping between manufacturers to ensure equivalent functionality in the target application.