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SIC645A, 60 A, VRPower® Smart Power Stage (SPS) Module

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SIC645A, 60 A, VRPower® Smart Power Stage (SPS) Module

Vishay Siliconix offers its SIC645 in a 16% smaller PowerPAK® MLP package with integrated, high-accuracy current and temperature monitors

Vishay Siliconix's SiC645 is a smart VRPower device that integrates a high-side and low-side MOSFET and a high-performance driver with an 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 mm x 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 the multiphase controllers and can be used to disable the controller during start-up and fault conditions.

Features
  • Input range: 4.5 V to 18 V
  • Supports 60 A DC current
  • Compatible with 3.3 V (SiC645A) and 5 V (SiC645) tri-state PWM
  • Down-slope current sensing
  • ± 3 % accuracy current monitor (IMON) with REFIN input
  • 8 mV/°C temperature monitor with OT flag
  • Dedicated low-side FET control input
  • Fault protection
    • High-side FET short and over-current protection
    • Over-temperature protection
    • VCC and VIN under voltage lockout (UVLO)
  • Open-drain fault reporting output
  • Up to 2 MHz switching frequency
Applications Typical Application Diagram
  • High frequency and high efficiency VRM and VRD
  • Multiphase POL regulators for core, graphics, and memory
  • High-density VR for server, networking, and cloud computing
  • POL DC/DC converters and video gaming consoles