Automotive PMIC adds CAN FD, LIN

Automotive PMIC adds CAN FD, LIN

New Products |
By Nick Flaherty

STMicroelectronics has launched a power management IC (PMIC) for car body designs with CAN FD and LIN networking.

The SPSB081 automotive PMIC includes a main fixed-voltage low-dropout regulator (LDO), a secondary programmable LDO, four high-side drivers, a CAN FD transceiver and an optional LIN transceiver. The PMIC provide multiple standby modes with very low quiescent current and programmable local or remote wake-up to help minimize power consumption.

The power sources and transceivers available on-chip help simplify the design of car-body controllers for a sunroof, seats, tailgate, doors, and lighting modules. Highlighting their adaptability, the controllers are also used in gateways, HVAC controllers, passive keyless entry systems, telematic control units, and control panels.

Variants include the SPSB081C3 and SPSB081C5, which contain a 3.3V or 5V fixed LDO, respectively, with one CAN transceiver. The SPSB0813 and SPSB0815 contain the additional LIN transceiver. The secondary LDO, included in all variants, can be programmed through the IC’s SPI port to operate as an independent 3.3V or 5V regulator, or to track the main LDO. The four high-side drivers can source up to 140mA to power LEDs and sensors, with current monitoring and a 10-bit PWM timer for each channel.

Built-in protection and a diagnostic output pin for fail-safe signaling support functional safety requirements for ISO 26262 designs, even if not designed as a safety hardware element. All outputs feature overcurrent protection and open-load fault indication. The primary (fixed) LDO features overvoltage protection, and thermal protection circuity while the secondary (programmable) LDO has overload, overtemperature, short-circuit, and reverse-bias protection. Both have short-to-ground monitoring at startup and continuous regulator-failure monitoring.

The SPSB081 automotive PMIC family is AEC-Q100 qualified, specified from -40°C to 150°C, and able to operate up to 175°C. All variants are in production and available in a thermally enhanced 5mm x 5mm x 1mm QFN32L package, from $1.80 for orders of 1000 pieces.

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