ADI has introduced an efficient multiphase synchronous boost controller that adjusts high-power Class D amplifiers in automotive infotainment systems. The MAX25203 offers programmable gate drive voltage and current limit blanking time, as well as precise current balance. It operates at a high switching frequency to reduce BOM and PCB space by 36%.
It joins the company's line of automotive boost controllers, including the MAX25201 and MAX25202 single/dual boost controllers, designed for low-power applications.
The device can be used to generate backlight and class D audio amplifier voltages, provide I²C bus diagnostics, and combine on-chip temperature, phase current monitoring, and optional true off functions to improve system reliability. The output voltage can be expanded via PWM input or I²C interface, and the synchronous output element supports more phases for higher power systems.
The controller starts with a battery input voltage of 4.5V to 42V, and the operating voltage drops to 1.8V after starting. It maintains an absolute maximum output voltage of up to 70V and provides A low off power current of 5µA.
