LM2677SD-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SD-5.0/NOPB is a SIMPLE SWITCHER® step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed 5 V output at up to 5 A. The device integrates a 0.55 Ω N-channel MOSFET and switches at a frequency of 260 kHz. It utilizes the TO-263-7 (D2PAK) package for surface-mount installation. The unit supports operation from -40°C to +125°C junction temperature and includes internal thermal shutdown and current limiting features.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current N-channel power MOSFET to minimize external component count
• Utilizes constant-frequency current-mode control architecture for rapid transient response
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distribution bus conversion in industrial equipment
• High-efficiency DC/DC conversion for battery-powered applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status against the manufacturer's latest documentation. Confirm the package designation corresponds to the TO-263-7 form factor required for your PCB layout. Ensure the fixed 5.0V output variant matches the system voltage requirements, as other voltage options exist within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from an 8V to 40V input source with up to 5A load capacity. The integrated MOSFET simplifies design compared to controllers requiring external switching elements. Consider the thermal performance of the D2PAK package relative to the expected ambient conditions and heat dissipation capabilities of the application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2677 family of SIMPLE SWITCHER regulators, designed for high-efficiency buck conversion. The SD suffix indicates the surface-mount D2PAK package variant, distinguishing it from through-hole or smaller footprint versions like the LM2677S or LM2677T. The family is characterized by minimal external components and robust protection features.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible substitutes within the same series include other voltage variants such as LM2677SD-ADJ/NOPB for adjustable output. Cross-series replacements may require schematic review due to differences in pinout or electrical characteristics.