NXP Semiconductors FS5600 Automotive Buck Regulator and Controllers integrate a battery-connected DC-DC controller with external FETs and a battery-connected DC-DC converter with internal FETs. The NXP FS5600 provides functional safety features, including independent voltage monitors, a windowed watchdog timer, I/O monitoring via ERRMON and FCCU, and a built-in self-test. The FS5600 is offered in enhanced ASIL B, ASIL B, and QM variations. The enhanced ASIL B version features a challenger watchdog and Logic BIST (LBIST), which may be used to achieve ASIL D functional safety at the system level. Additional safety mechanisms may be needed at the system level for ASIL D compliance.
