LM2677LD-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677LD-12 is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator manufactured by National Semiconductor. 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 a low ON-resistance DMOS power switch. It is housed in a 14-VSON package with exposed pad, suitable for surface mount applications across a temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low ON-resistance DMOS power switch for high efficiency
• Fixed 12V output configuration within the SIMPLE SWITCHER family
• Supports wide 8V to 40V input voltage range
• Includes internal frequency compensation and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Distributed power architectures requiring 5A capacity
• Battery-powered equipment with wide input variations

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor assets were acquired by Texas Instruments. Confirm RoHS compliance status and lead times through authorized distributors. Ensure the specific suffix matches the required package and temperature grade for your design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required with up to 5A load capability. Compare against the LM2676 series if lower current (3A) suffices, or the LM2678 if pin compatibility with other variants is needed. Verify thermal management requirements for the VSON package under full load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER family of buck regulators. It shares architectural similarities with the LM2676 and LM2678 series but offers higher current handling than the LM2676. The LD suffix typically denotes the specific VSON package variant within the product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB: Pin-compatible alternative from Texas Instruments in TO-263 package. LM2676SD-12/NOPB: Lower current (3A) alternative in similar footprint. Verify thermal performance differences between packages.