ASIL D PMIC boost for Aurix microcontroller functional safety

Infineon Technologies has launched a multirail power management IC (PMIC) for Aurix automotive microcontrollers.

The TLF35585 Optireg PMIC is certified up to the ASIL D for functional safety applications in harsh automotive environments, particularly in the chassis, powertrain, domain control and transmission areas.

The PMIC includes a boost buck pre-regulator that supplies the post-regulator rails for the microcontroller supply, communication supply and a precise voltage reference. It also provides two trackers that follow the voltage reference to supply off-board sensors. 

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The safety functions in the chip include a configurable window watchdog with a time-based trigger, a function watchdog with a question and response-based trigger, error pin monitoring as well as voltage monitoring. It also integrates a flexible state machine, the wake-up concept with timer and a stand-by regulator, making the device suitable for a wider range of applications.

A 16-bit SPI, interrupt and reset function provide the link to a microcontroller such as the Aurix TC2x and TC3x families says Infineon. A wide switching frequency range enables optimization of efficiency and the use of small filter components.

The TLF35585 PMIC is AEC-Q100 qualified to Grade 0 and available in thermally enhanced VQFN-48 and TQFP-48 packages with an extended junction temperature range of up to 175°C up until 2038.