Infineon Technologies TLF35585QxS0x OPTIREG™ Functional Safety Power Management Integrated Circuits (PMICs) are highly efficient devices for automotive safety-relevant applications. The power supply includes a boost-buck pre-regulator supplying post-regulator rails for the microcontroller supply, a communication supply, and a precise voltage reference. In addition, two trackers following the voltage reference are available to supply off-board sensors. The Infineon TLF35585QxS0x OPTIREG™ PMICs come with a configurable window watchdog (time-based trigger) and functional watchdog (question and answer-based trigger), error pin monitoring, and voltage monitoring functions as major supervision functions. A 16-bit SPI and an interrupt/reset function are provided for microcontroller interaction. The device has been developed according to ISO 26262, targeting systems up to ASIL D, and supports an extended junction temperature range of up to +175°C.
