LM2670SDX-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2670SDX-12/NOPB is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 12V output at up to 3A. The device integrates a synchronous switch for improved efficiency, eliminating the need for an external catch diode. It functions at a fixed switching frequency of 260kHz and supports operation temperatures from -40°C to +125°C. Packaged in a compact VSON-14 surface-mount case, it includes thermal shutdown and current limit protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a synchronous rectifier switch to enhance conversion efficiency and simplify design by removing the external catch diode requirement.
• Features a fixed 260kHz switching frequency that allows for the use of small passive components while maintaining stable regulation.
• Includes comprehensive protection mechanisms such as thermal shutdown and adjustable current limiting to ensure robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems requiring 12V rails
• Battery-powered equipment utilizing buck conversion from higher voltage sources
• Industrial control modules operating within wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number suffix, specifically checking for NOPB to confirm lead-free and RoHS compliance status. Confirm the package type matches the required VSON-14 footprint for PCB layout compatibility. Ensure the specific output voltage variant corresponds to the system design requirements before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required with up to 3A load capability. It is suitable for designs prioritizing high efficiency through synchronous rectification over adjustable output flexibility. Consider the VSON-14 package constraints regarding thermal dissipation and board space availability during the selection process.

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 series specifically targets applications needing 3A output current. It shares architectural similarities with other members like the LM2676 and LM2677 but differs in current rating and integration features.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2670SD-12/NOPB for non-tape-and-reel packaging or LM2670SDX-ADJ/NOPB if adjustable output is acceptable. Verify pinout and thermal pad configurations match the existing design to ensure mechanical and electrical compatibility without redesigning the PCB.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM2670SDX-12 require an external catch diode?

No, the LM2670 integrates a synchronous switch internally, which eliminates the need for an external catch diode compared to previous generations.

What is the maximum input voltage for this regulator?

The maximum input voltage supported by the LM2670SDX-12 is 40V.