LM2677SDX-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SDX-5.0 is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator manufactured by Texas Instruments. It operates with a fixed 5V output and supports an input voltage range from 8V to 40V. The device utilizes a buck topology with a standard switching frequency of 260kHz. It is housed in a TO-263-7 (D2PAK) surface-mount package. Key electrical specifications include a maximum output current of 5A, a quiescent current of 4.2mA, and an operating junction temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch eliminates the need for external components typically required in discrete designs.
• Fixed internal feedback network simplifies design by providing stable regulated output without external resistor dividers.
• Built-in thermal shutdown and current limit protection ensure reliable operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial control systems
• Distribution bus conversion in embedded computing platforms
• High-current power supplies for telecommunications equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SDX' corresponds to the tape-and-reel packaging format within the TO-263-7 case. Confirm RoHS compliance status via the manufacturer's latest datasheet revision, as legacy versions may differ. Ensure the ordering part number matches the exact output voltage variant to prevent functional mismatches in final assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output at up to 5A is required from an 8V to 40V input source. The TO-263-7 package offers superior thermal dissipation compared to smaller footprints, making it suitable for applications where heat management is critical without additional heatsinking. Consider the 260kHz frequency for balancing component size and efficiency.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2677 series of SIMPLE SWITCHER regulators, which are designed to simplify power supply design while maintaining high efficiency. The series includes various output voltage options and packages, such as the through-hole LM2677T and the smaller LM2676 variants. The LM2677 specifically targets higher current applications compared to the 3A LM2676.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM2677 variants with different output voltages or packages, such as LM2677S-5.0/NOPB. Cross-series replacements like the LM2596 require careful evaluation of pin compatibility and thermal performance differences.