LM2677SD-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SD-ADJ is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator manufactured by Texas Instruments, originally from National Semiconductor. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage between 1.235V and 37V. The device features a fixed switching frequency of 260kHz and supports synchronous rectification for improved efficiency. It is housed in a 14-VSON package and functions within a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency
• Fixed 260kHz switching frequency reduces external component size
• Internal soft-start limits inrush current during startup
• Thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Industrial control power supplies
• Distributed power architectures
• Battery-powered equipment charging circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin as Texas Instruments or National Semiconductor. Confirm the suffix indicates the adjustable version. Check RoHS compliance status as older batches may differ. Ensure the 14-VSON package matches the design footprint requirements before ordering.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 5A buck converter is required with minimal external parts. The adjustable output allows flexibility for various rail voltages. Consider the 260kHz frequency for balancing efficiency and passive component size. Verify thermal management needs 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 DC-DC converters. It shares architectural similarities with the LM2676 and LM2678 but offers higher current capability than the LM2676. The SD suffix denotes the specific 14-VSON surface-mount package variant used for compact designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677SX-ADJ (TO-263 package)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum input voltage for the LM2677SD-ADJ?

The minimum operating input voltage is 8V.

Does the LM2677SD-ADJ include internal synchronous rectification?

Yes, it integrates synchronous rectifiers to improve efficiency compared to non-synchronous regulators.