LM2670SX-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2670SX-5.0/NOPB is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator from Texas Instruments. It operates with a fixed 5V output and supports an input voltage range of 8V to 40V. The device integrates a 1.2A/3A synchronous switch, enabling efficient power conversion at a typical switching frequency of 260kHz. It features a TO-263-7 (D2PAK) package for surface mount installation. The regulator includes thermal shutdown and current limit protection, operating reliably within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-efficiency synchronous rectifier switch to minimize external component count and improve power density.
• Incorporates internal compensation and frequency compensation to simplify design and ensure stable loop performance.
• Features built-in thermal shutdown and cycle-by-cycle current limiting to protect the device under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with 24V or 48V bus architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number suffix, specifically ensuring the presence of /NOPB for lead-free/RoHS compliance when sourcing. Confirm the package variant matches the required footprint, as SX denotes the TO-263-7 case. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency and any updated electrical characteristics before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring a fixed 5V output with up to 3A load current capability. It is suitable for applications where a 260kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Ensure the input voltage remains within the 8V to 40V range and that thermal management strategies account for the TO-263-7 package's thermal resistance in the specific PCB layout.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM267x family of SIMPLE SWITCHER regulators, which are designed for high-efficiency DC-DC conversion. The LM2670 specifically targets 3A applications, distinguishing it from the higher-current LM2677 or lower-current variants. It represents a mature technology line from Texas Instruments, originally developed by National Semiconductor, widely used in general-purpose power supply designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2670SX-5.0/NOPB and LM2670SX-ADJ/NOPB for adjustable output versions. For non-NOPB variants, verify RoHS compliance requirements. Alternative packages such as SD (VSON) or LD (LLP) offer different thermal profiles but require distinct footprints.