EMI compliance simplified

Louise Smyth

Texas Instruments has introduced two families of wide-VIN synchronous DC/DC buck regulators with industry-leading electromagnetic interference (EMI) and thermal performance. The highly integrated 5A and 6A LM73605/6 and 2.5A and 3.5A LM76002/3 step-down voltage converters feature an optimised pinout and best-in-class thermal coefficient to simplify the process of achieving EMI compliance and higher reliability for rugged industrial and automotive power supplies. 

 
The 3.5V to 36V LM73605/6 and 3.5V to 60V LM76002/3 buck regulators meet and exceed the demanding CISPR 25 Class 5 automotive electromagnetic compatibility (EMC) requirements. These 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, or below the AM band to optimise efficiency. 
 
The small QFN package with unique wettable flanks delivers an ultra-low thermal coefficient 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.