DC/DC buck regulators from Texas Instruments are claimed to simplify the process of achieving EMI compliance and high reliability for rugged industrial and automotive applications.
Texas Instruments has introduced two families of wide-VIN synchronous DC/DC buck regulators with industry-leading EMI and thermal performance. The integrated 5.0 and 6.0A LM73605/6 and 2.5 and 3.5A LM76002/3 step-down voltage converters feature an optimised pin-out and what is claimed to be best-in-class thermal co-efficient to simplify the process of achieving EMI compliance. They are intended for use where high reliability is required, for example rugged industrial and automotive power supplies.
The 3.5 to 36V LM73605/6 and 3.5 to 60V LM76002/3 buck regulators meet and exceed the demanding CISPR 25 Class 5 automotive EMC requirements, says Texas Instruments. The The automotive-grade LM76002-Q1, LM76003-Q1, LM73605-Q1 and LM73606-Q1 support compact automotive applications such as the infotainment head unit and front/surround-view cameras used for autonomous driving.
The regulators’ programmable output switching frequency can be set either above the AM band, which eliminates AM-band interference and reduces output filter size and cost. It can also be set below the AM band to optimise efficiency.
The small QFN package with unique wettable flanks delivers a low thermal co-efficient of 7.1ºC/W (ΨJB) to improve reliability and enables post-solder optical inspection to simplify manufacturing. Optimised package pin placement allows flexibility in board design to improve heat sinking, which minimises radiated and conducted emissions, claims Texas Instruments.
The new DC/DC converters 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.
The new regulators offer up to 92 per cent full load efficiency at 12 VIN, 5 VOUT and 500kHz switching frequency. Very low 15-microA standby quiescent current increases light load efficiency.
All four DC/DC buck regulators are offered in a 30-pin, 4.0 x 6.0mm WQFN package.