IR3821A

The IR3821A SupIRBuck^TM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3821A a space-efficient solution, providing accurate power delivery for low output voltage applications.

The IR3821A operates from a 4.5V to 14V input supply and generates an output voltage adjustable from 0.6V to 0.75*Vin at loads up to 9A.

A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3821A's fixed 300kHz switching frequency allows the use of small external components.

The IR3821A also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to provide the required system level security in the event of fault conditions.