4-V to 18-V, 8-A, synchronous step-down converter extended temperature

The TPS543820E is a

high-efficiency 18-V, 8-A synchronous buck converter employing an

internally-compensated, fixed-frequency Advanced Current Mode control. It is capable

of providing high efficiency while running at a switching frequency up to 2.2 MHz.

The device is in a small 2.5-mm × 3-mm HotRod™ VQFN

package, which when coupled with high efficiency at high frequency, makes it optimal

for designs requiring a small solution size. The fixed frequency controller can

operate from 500 kHz to 2.2 MHz and can be synchronized to an external clock using

the SYNC pin. Additional features include a high accuracy voltage reference,

selectable soft start times, montonic start-up into pre-biased outputs, selectable

current limits, adjustable UVLO through the EN pin, and a full suite of fault

protections.