MAX20031
Description
The MAX20030/MAX20031 ICs are automotive 2.2MHz dual-synchronous step-down controllers with preboost controller and low-IQ LDO. The preboost controller enables VOUT1 and VOUT2 to stay in regulation during coldcrank operation all the way down to a battery input of 2V. The ICs offer two high-voltage synchronous step-down controllers that operate 180 degrees out of phase. This device operates with an input-voltage supply from 3.5V to 42V and can operate in dropout conditions by running at 97% duty cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range, such as during automotive cold-crank or engine stop-start conditions.
The step-down controllers operate at a frequency of up to 2.2MHz to allow small external ponents and reduced output ripple, and to guarantee no AM band interference. The switching frequency is resistor-adjustable (220k Hz to 2200k Hz). SYNC input programmability enables three frequency modes for...
