The SiC645 is a smart VRPower device that integrates a high side and low side MOSFET, a high performance driver with integrated bootstrap FET. The SiC645 offers high-accuracy current and temperature monitors that can be fed back to the controller and doubler to complete a multiphase
dc/dc system. They simplify design and increase performance by eliminating the DCR sensing network and associated thermal compensation. Light-load efficiency is supported via a dedicated left control pin. An industry leading thermally enhanced dual cooled, 5×5-mm PowerPAK MLP package allows minimal overall PCB real estate and low-profile construction.
The devices feature a 3.3-V (SiC645A) or 5-V (SiC645) compatible tri-state PWM input that, 
working together with multiphase PWM controllers, will provide a robust solution in the event of abnormal operating conditions. The SiC645 also improves system performance and reliability with integrated fault protection of UVLO, over-temperature and over-current. An open-drain fault reporting pin simplifies the handshake between the smart VRPower device and multiphase controllers and can be used to disable the controller during start-up and fault conditions.
Features include an input range of 4.5 to 18 V for up to 60 A of dc current. The devices incorporate down-slope current sensing and current monitoring with ±3% accuracy, 8 mV/°C temperature monitoring, dedicated low-side FET control input and fault protection, high-side FET short and over-current protection, over-temperature protection, VCC and VIN under-voltage lockout, open-drain fault reporting output, and an ability to switch at up to a 2 MHz rate.
Applications include high-frequency and high-efficiency voltage regulators, core, graphic, and memory regulators for microprocessors, and POL dc/dc converters and video gaming consoles.
Vishay Intertechnology Inc., 63 Lancaster Ave., Malvern, PA 19355, 610-644-1300, www.vishay.com
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