LM2677LD-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677LD-ADJ is a high-efficiency 5A step-down voltage regulator from the SIMPLE SWITCHER family, manufactured by National Semiconductor (now Texas Instruments). It operates with a maximum switching frequency of 280 kHz and supports an input voltage range up to 40V. The device features an adjustable output voltage configuration, housed in a 14-pin LLP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low ON-resistance DMOS power switch for efficient high-current handling
• Utilizes pulse width modulation control mode for stable regulation
• Includes internal frequency compensation to minimize external component count

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• High-efficiency DC/DC conversion in industrial equipment
• Battery-powered applications requiring extended runtime

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify manufacturer origin as National Semiconductor or Texas Instruments due to acquisition history. Confirm package type matches LLP-14 specifications. Check RoHS compliance status as older batches may not meet current environmental standards. Validate part number suffixes against official datasheets to ensure functional equivalence.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5A buck converter is insufficient for variable load requirements. The adjustable version allows customization of output voltage via external resistors. Ensure input voltage does not exceed 40V and thermal management suits the 14-VDFN package constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the SIMPLE SWITCHER series designed for simplified power supply design. Related models include fixed-output variants like LM2677S-3.3 and lower-current siblings such as the LM2676. The LD-ADJ variant specifically targets applications needing precise, user-defined output voltages within the 5A capability envelope.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677SX-ADJ offers equivalent functionality in a different package format. LM2678SX-ADJ provides similar performance with potential layout differences. Verify pin compatibility and thermal characteristics before substitution.