SiC401A, SiC401BCD

www.vishay.com

Vishay Siliconix

S20-0483-Rev. E, 29-Jun-2020

1

Document Number: 63835

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

Integrated Buck Regulator with Programmable LDO

DESCRIPTION

The Vishay Siliconix SiC401A/B an advanced stand-alone

synchronous buck regulator featuring integrated power

MOSFETs, bootstrap switch, and a programmable LDO in a

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 Vishay Siliconix SiC401A/B also provides

an enable input and a power good output.

Note

a. See “High Output Voltage Operation” section

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 ultra sonic 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

• PowerCAD Simulation software available at



www.vishay.com/power-ics/powercad-list/

• Material categorization: for definitions of compliance

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

PRIMARY CHARACTERISTICS

Input voltage range

3 V to 17 V

Operating frequency

200 kHz to 1 MHz

Continuous output current

15 A

Peak efficiency

93 %

Package

PowerPAK MLP32-55G