LM2677SD-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SD-12/NOPB is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 12V output at up to 5A. The device features a 260kHz switching frequency and integrates synchronous rectification for improved efficiency. It is housed in a compact 14-VSON package, suitable for surface-mount applications across a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification to maximize conversion efficiency
• Supports wide 8V to 40V input voltage ranges
• Delivers fixed 12V output with 5A current capability
• Utilizes a compact 14-VSON package for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Power supplies for embedded computing systems
• Battery-powered devices requiring efficient step-down conversion
• Telecommunications infrastructure power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the suffix /NOPB confirms lead-free and RoHS compliance. Confirm the specific package variant (SD vs S) matches the required footprint, as pinouts may differ between VSON and TO-263 packages. Cross-reference the datasheet revision date to ensure compatibility with latest design guidelines.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required with high current demands up to 5A. The integrated synchronous rectifier makes it suitable for applications prioritizing thermal performance and efficiency over cost-sensitive non-synchronous alternatives. Consider the 14-VSON package size constraints during PCB layout planning.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2677 family of SIMPLE SWITCHER regulators, which are designed to simplify power supply design with minimal external components. The SD suffix indicates the 14-VSON package variant, distinguishing it from the TO-263 packaged LM2677S series. The family is known for robust performance in demanding industrial and commercial environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB offers identical electrical specifications but utilizes a TO-263 package instead of VSON. LM2678SD-12/NOPB provides similar performance in the same package but may have minor parameter differences. Verify pinout compatibility before substituting.