Texas Instruments DC-DC buck regulators simplify EMI compliance

Texas Instruments DC-DC buck regulators

Texas Instruments has introduced two families of wide-Vin synchronous DC-DC buck regulators that simplify the process of achieving EMI compliance and reliability for rugged industrial and automotive applications.

The integrated 5 and 6A LM73605/6 and 2.5 and 3.5A LM76002/3 step-down voltage converters have an optimised pin-out and thermal coefficient to simplify the process of achieving EMI compliance and reliability.

The 3.5 to 36V LM73605/6 and 3.5 to 60V LM76002/3 meet and exceed the Cispr 25 Class 5 automotive EMC requirements. The programmable output switching frequency can be set either above the AM band, which eliminates AM-band interference and reduces output filter size and cost, or below the AM band to improve efficiency.

The QFN package with wettable flanks delivers a thermal coefficient of 7.1˚C/W to improve reliability and enable post-solder optical inspection to simplify manufacturing. Package pin placement allows flexibility in board design to improve heat sinking, which reduces radiated and conducted emissions.

They provide up to 60V operating input voltage range for nominal 12, 24 or 48V systems such as remote radio units, ultrasound scanners, motor drives, inverters and servo control units.

There is up to 92 per cent full load efficiency at 12Vin, 5Vout and 500kHz switching frequency. The 15µA standby quiescent current increases light load efficiency.

They support compact automotive applications such as the infotainment head unit and front and surround-view cameras used for autonomous driving.

Devices come in a 30-pin, 4 by 6mm WQFN package.


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