FTM Board Club
Stand-alone Synchronous Buck Regulator Reference Board

The Vishay Siliconix SiC401A/B, SiC402A/B and SiC403A/B are advanced stand-alone synchronous buck regulators, featuring integrated power MOSFETs, bootstrap switch, and a programmable LDO in a space-saving PowerPAK MLP55-32L pin packages.

The SiC401A/B, SiC402A/B and SiC403A/B are capable of operating with all ceramic solutions and switching frequencies up to 1 MHz. The programmable frequency, synchronous operation and selectable power-save feature allow operation at high efficiency across the full range of load current. The internal LDO may be used to supply 5 V for the gate drive circuits or it may be bypassed with an external
5 V for optimum efficiency and used to drive external n-channel MOSFETs or other loads. Both
the SiC401A/B, SiC402A/B and SiC403A/B provides an enable input and a power good output.

  • • SiC401 provides 15 A continuous output current capability
    • SiC402 provides 10 A continuous output current capability
    • SiC403 provides 6 A continuous output current capability
    • Light Load Power Save Operation
    - SiC401A, SiC402A and SiC403A:
    minimum operating frequency fixed at 25 kHz
    - SiC401B, SiC402B and SiC403B:
    no minimum operating frequency
    • Integrated bootstrap switch
    • Programmable 200 mA LDO with bypass logic
    • Temperature compensated current limit
    • Pseudo fixed-frequency adaptive on-time control
    • All ceramic solution enabled
    • Programmable input UVLO threshold
    • Independent enable pin for switcher and LDO
    • Programmable soft-start and soft-shutdown
    • 1 % internal reference voltage
    • Power good output
    • Over-voltage and under-voltage protections