ANALOG DEVICES’ DC-DC SWITCHING CONTROLLER FEATURES CURRENT-MODE AND VOLTAGE-MODE OPTIONS FOR HIGH-CURRENT APPLICATIONS
In current-mode control, the ADP1853 architecture detects the current during the off period to improve noise immunity using the on-resistance of the low-side FET—or a series sense resistor for higher accuracy. Externally adjustable slope compensation is added to optimize performance in current mode. With minor adjustments to external resistor settings, the ADP1853 can be configured for voltage-mode control, using input-line feed-forward for excellent line rejection. The ADP1853 has a selectable pulse-skip mode to increase efficiency during light load operation. The device also has an accurate current limit, which allows optimal sizing selection of external components to optimize valuable PCB space. The ADP1853 is accompanied by ADI’s online ADIsimPowerTM tools for ease of use and reduced design time.