LM2576D2TR4-3.3G

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576D2TR4-3.3G is a monolithic integrated circuit from the LM2576 series, functioning as a step-down switching regulator (buck converter). Manufactured by onsemi, this device provides a fixed 3.3V output with a maximum load current of 3A. It operates within an input voltage range of 7V to 40V and utilizes a fixed internal oscillator frequency of 52kHz. The component is housed in a surface-mount TO-263 package with five pins. It ensures excellent line and load regulation, achieving efficiencies up to 77% under specified conditions, while maintaining operation across a temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency 52kHz oscillator and internal error amplifier for simplified design
• Provides built-in thermal shutdown and cycle-by-cycle current limiting for fault protection
• Supports external TTL-compatible shutdown control for low-power standby modes

Voltage Regulators - DC DC Switching Regulators Applications

• Simple and efficient step-down DC-DC converters
• High-efficiency pre-regulators for linear regulators
• On-card switching regulators for local power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'D2TR4' against official onsemi documentation to confirm tape-and-reel packaging specifications and exact marking codes. Ensure the ordering part number matches the required RoHS compliance status and lead-free finish. Cross-reference the manufacturer's latest datasheet to validate pinout configurations and recommended operating conditions before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with up to 3A continuous load capability. It is suitable for designs needing wide input voltage tolerance up to 40V. Consider the 52kHz switching frequency implications for external inductor size compared to higher-frequency alternatives. Verify that the TO-263 package thermal performance meets the application's heat dissipation requirements without excessive heatsinking.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 family of SIMPLE SWITCHER regulators, designed as high-efficiency replacements for traditional three-terminal linear regulators. The series is known for minimizing external component count while delivering robust performance. The LM2576D2TR4-3.3G specifically offers a fixed 3.3V output option, distinguishing it from adjustable or other fixed-voltage variants within the same product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements include the LM2576S-3.3 from Texas Instruments. Other compatible options within the LM2576 family may require verification of package compatibility and electrical parameter alignment. Ensure substitute parts maintain the same 3A current rating and 52kHz switching frequency characteristics.