ищите LM5118 реальная альтернатива для 12в канала и ценник вроде вкусней.
Wide Voltage Range Buck-Boost Controller
LM5118Q is an Automotive Grade product that is AEC-
Q100 grade 1 qualified (-40°C to 125°C operating junction
temperature)
Ultra-wide input voltage range from 3V to 75V
Emulated peak current mode control
Smooth transition between step-down and step- up modes
Switching frequency programmable to 500KHz
Это конечно не LNC синхронный но все-же ....
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Accent + Mystery MMT-8120S+ежик700_2Gssd_798МГц проц 
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