LM2677SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SX-5.0/NOPB is a SIMPLE SWITCHER® high-efficiency 5A step-down voltage regulator from Texas Instruments, operating at a fixed 260 kHz switching frequency. It delivers a fixed 5.0 V output with a maximum load current of 5 A over an input voltage range of 8 V to 40 V. The device utilizes a TO-263-7 (D2PAK) surface-mount package and supports operation within a junction temperature range of -40°C to +125°C. It features a typical quiescent current of 4.2 mA and includes internal thermal shutdown and current limit protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch eliminates the need for external components in standard buck configurations
• Fixed 260 kHz switching frequency enables the use of small inductors and capacitors
• Internal thermal shutdown and cycle-by-cycle current limiting ensure robust operation under fault conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Distribution power supplies requiring high current efficiency
• Battery-powered systems needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'SX' indicates tape-and-reel packaging and 'NOPB' confirms lead-free/RoHS compliance. Confirm the manufacturer is Texas Instruments and the part number matches exactly. Check datasheet revisions for any pinout or electrical parameter updates before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required with up to 5A continuous load capability. Ensure the input voltage remains between 8V and 40V. Consider the TO-263-7 package for thermal performance requirements. Verify that the 260 kHz frequency aligns with EMI constraints and passive component size goals.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2677 series of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. It is functionally similar to the LM2576 but offers improved efficiency and smaller external component sizes due to higher switching frequencies. The series is widely used in general-purpose power supply designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677T-5.0/NOPB (TO-220 package variant)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum input voltage required for the LM2677SX-5.0/NOPB?

The minimum input voltage is 8 V.

Does the LM2677SX-5.0/NOPB include short-circuit protection?

Yes, it features internal cycle-by-cycle current limiting and thermal shutdown protection.