IRDC3853: 1.8V @ 4A, 12V in

The IR3853 is a synchronous buck converter, providing a compact, high performance and flexible solution in a small 4 mm x 5 mm Power QFN package.

Key features offered by the IR3853 include programmable soft-start ramp, precision 0.7 V reference voltage, Power Good, thermal protection, over voltage protection, programmable switching frequency, synchronization to external clock, Sequence input, Enable input, input under-voltage lockout for proper start-up, and pre-bias start-up.

An output over-current protection function is implemented by sensing the voltage developed across the on-resistance of the synchronous rectifier MOSFET for optimum cost and performance.

The user guide contains the schematic and bill of materials for the IR3853 evaluation board. The guide describes operation and use of the evaluation board itself. Detailed application information for IR3853 is available in the IR3853 data sheet.