LM2576T-3.3G

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576T-3.3G is a monolithic integrated circuit from the onsemi LM2576 series, functioning as a step-down (buck) switching regulator. It provides a fixed 3.3 V output with a guaranteed maximum load current of 3 A. The device operates at a fixed internal oscillator frequency of 52 kHz and supports an input voltage range up to 40 V. Packaged in a TO-220-5 through-hole configuration, it includes internal frequency compensation and requires minimal external components. The unit weight is specified as 3 g.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation to minimize external component count.
• Includes cycle-by-cycle current limiting and thermal shutdown for fault protection.
• Supports external shutdown control with low standby current consumption.

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down (Buck) switching regulators
• High-efficiency pre-regulators for linear regulators
• On-card regulation systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify end-of-life status before procurement, as discontinuance notifications exist for this product line. Confirm RoHS compliance details via official datasheets. Ensure the TO-220-5 package matches board layout requirements. Validate that the 3.3 V fixed output aligns with system design needs. Check for alternative sources if active production is unavailable.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring a simple, high-efficiency buck converter with a fixed 3.3 V output. The 3 A current capability suits moderate power loads without extensive heat sinking in many cases. The 52 kHz frequency allows the use of standard, cost-effective inductors. Consider the through-hole package for prototyping or applications where surface-mount options are unsuitable.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 SIMPLE SWITCHER family, known for replacing three-terminal linear regulators with higher efficiency. The 'T' suffix indicates the TO-220-5 through-hole package, while '3.3' denotes the fixed output voltage. The 'G' suffix typically signifies lead-free and halogen-free packaging compliant with environmental standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM2576T-3.3 from other manufacturers like Texas Instruments or Microchip Technology. Verify pin compatibility and thermal performance when cross-referencing datasheets from different vendors.