LM2676SD-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2676SD-5.0/NOPB is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 5V output at up to 3A. The device features a 260kHz switching frequency, 4.2mA typical quiescent current, and supports junction temperatures from -40°C to +125°C. Packaged in a 14-VSON (5x6mm) surface-mount format, it integrates a power switch for compact buck converter designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch eliminates the need for external boost diodes or catch diodes.
• Fixed 260kHz switching frequency enables the use of small inductors and capacitors.
• Internal frequency compensation simplifies design and reduces component count.
• Thermal shutdown and current limit protection ensure robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems operating from 24V or 48V buses
• Telecommunications infrastructure power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix /NOPB confirms lead-free and RoHS compliance per Texas Instruments specifications. Confirm the package designation matches the 14-VSON footprint required for your PCB layout. Ensure the fixed 5.0V output variant aligns with system voltage requirements, as adjustable versions exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 5V output is required from an 8V to 40V input source. The 3A continuous current rating suits moderate load applications. Consider the 14-VSON package for space-constrained designs. Verify that the 260kHz frequency meets EMI constraints, as higher frequencies may require different filtering strategies.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2676 SIMPLE SWITCHER family, which includes variants with different output voltages and packages such as TO-263 and D2PAK. The SD suffix specifically denotes the VSON package, distinguishing it from through-hole or larger surface-mount options like the S or SX series within the same product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2676SD-5.0/NOPB is the direct lead-free replacement for the older LM2676SD-5.0. Other family members like LM2676SX-5.0/NOPB offer alternative packaging but share identical electrical characteristics.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM2676SD-5.0/NOPB require an external catch diode?

No, the device integrates an internal power switch and does not require an external catch diode, reducing component count.

What is the maximum input voltage for this regulator?

The maximum input voltage is 40V, allowing operation from standard 24V and 48V industrial bus systems.