LM2677LD-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677LD-5.0 is a SIMPLE SWITCHER high-efficiency 5-A step-down voltage regulator manufactured by National Semiconductor (now Texas Instruments). It operates with a fixed switching frequency of 260 kHz and supports an input voltage range from 8 V to 40 V, delivering a fixed 5.0 V output. The device integrates a low ON-resistance DMOS power switch and synchronous rectification for improved efficiency. It is housed in a 14-pin LLP-14 package and functions as a buck converter suitable for various DC-DC applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low ON-resistance DMOS power switch capable of driving large current loads
• Features synchronous rectification to enhance conversion efficiency
• Operates at a fixed 260 kHz switching frequency to minimize external component size

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power systems
• Battery-powered equipment requiring efficient step-down conversion
• General-purpose DC/DC converters for industrial applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific suffix matches the required package type and output voltage tolerance. Confirm RoHS compliance status if environmental regulations apply to your deployment. Cross-reference the datasheet revision date to ensure compatibility with current design standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required from an 8 V to 40 V input source. The 5 A current rating and synchronous design make it suitable for high-efficiency needs. Consider the thermal performance of the LLP-14 package relative to your PCB layout and ambient temperature constraints compared to non-synchronous alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER family of regulators, designed for ease of use with minimal external components. It is part of a broader lineup that includes adjustable versions and different output voltages. The LM2677 series is characterized by its integrated power switch and synchronous rectifier, distinguishing it from earlier generations of buck regulators.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677SX-5.0: Alternative package variant within the same functional family.