SIC401ACD-T1-GE3

The SiC401A/B is an advanced stand-alone synchronous buck regulator featuring integrated power MOSFETs, bootstrap switch, and a programmable LDO in a space-saving PowerPAK MLP32-55G pin package. The SiC401A/B is capable of operating with all ceramic solutions and switching frequencies up to 1 MHz. The programmable frequency, synchronous operation and selectable power-save 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. Additional features include cycle-by-cycle current limit, voltage soft-start, under voltage protection, programmable over current protection, soft shutdown and selectable power-save. The SiC401A/B also provides an enable input and a power good output. The SiC401A/B is a step down synchronous DC/DC buck converter with integrated power MOSFETs and a 200 mA capable programmable LDO. The device is capable of 15 A operation at very high efficiency. A space saving 5 mm×5 mm 32-pin package is used. The programmable operating frequency of up to 1 MHz enables optimizing the configuration for PCB area and efficiency. The buck controller uses a pseudo-fixed frequency adaptive on-time control. This control method allows fast transient response which permits the use of smaller output capacitors.

Applications

• Notebook, desktop and server computers
• Digital HDTV and digital consumer applications
• Networking and telecommunication equipment
• Printers, DSL, and STB applications
• Embedded applications
• Point of load power supplies

Key features

• High efficiency >93 %
• 15 A continuous output current capability
• Integrated bootstrap switch
• Programmable 200 mA LDO with bypass logic
• Temperature compensated current limit
• All ceramic solution enabled
• Pseudo fixed-frequency adaptive on-time control
• Programmable input UVLO threshold
• Independent enable pin for switcher and LDO
• Selectable ultrasonic power-save mode (SiC401A)
• Selectable power-save mode (SiC401B)
• Programmable soft-start and soft-shutdown
• 1 % internal reference voltage
• Power good output
• Over voltage and under voltage protections