General Description

The RT6206B is a synchronous step-down DC/DC converter

with Advanced Constant On-Time (ACOTTM) mode control.

It achieves high power density to deliver up to 5.5A output

current from a 4.5V to 18V input supply. The proprietary

ACOTTM mode offers an optimal transient response over a

wide range of loads and all kinds of ceramic capacitors,

which allows the device to adopt very low ESR output

capacitor for ensuring performance stabilization. In

addition, RT6206B keeps an excellent constant switching

frequency under line and load variation and the integrated

synchronous power switches with the ACOTTM mode

operation provides high efficiency in whole output current

load range. Cycle-by-cycle current limit provides an

accurate protection by a valley detection of low side

MOSFET and external soft-start setting eliminates input

current surge during startup. Protection functions include

thermal shutdown for RT6206B.

The RT6206B are available in the SOP-8 (Exposed Pad)

and WDFN-10L 3x3 packages.