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40V step-down converters target automotive applications with lowest quiescent current

40V step-down converters target automotive applications with lowest quiescent current

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By Christoph Hammerschmidt



While customers increasingly expect always-on applications in their vehicles, designers are challenged with having to balance delivering advanced features with meeting size constraints, power-saving features, and high efficiency.

The MAX20075 and MAX20076 in peak current mode draw just 3.5µA in the low power operating mode, which is key to meeting the stringent OEM IQ consumption requirements of 100µA per module. The converters enable low noise operation via pin-controlled spread spectrum and fixed 2.1MHz operation to meet CISPR 25 Class 5 EMI compliance. Furthermore, added advantage of the 2.1MHz operation and internal compensation is that it lowers the solution size and the bill of materials (BOM) compared to a non-synchronous device that operates in the AM band. The MAX20075 and MAX20076 are available with a low minimum on-time mode operation, which allows the converters to support large input-to-output conversion ratios. For example, Vbatt input to Vout of <3V at 2.1MHz; this translates to not having to use a secondary supply, which reduces overall BOM cost by $0.30 to incorporate new functions into the design for greater flexibility. The MAX20075 and MAX20076 meet AEC-Q100, are available in a 3x3mm TDFN package, and operate over the -40oC to +125oC temperature range.

MAX20075EVKIT# and MAX20076EVKIT# evaluation kits are available.

 

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