Automotive PMICs integrate CAN FD and LIN
Simpler vehicle body controllers are the intention for STMicroelectronics’ SPSB081 automotive power-management IC (PMIC). It features 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 ICs provide multiple standby modes with very low quiescent current and programmable local or remote wake-up to help minimise power consumption, added the company.
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. The adaptable PMICs can be used in gateways, HVAC controllers, passive keyless entry systems, telematic control units and control panels.
There are four variants available. The SPSB081C3 and SPSB081C5 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.
In addition to built-in protection, there is a diagnostic output pin for fail-safe signalling ensuring suitability for use in pplications that must satisfy functional safety requirements in accordance with ISO 26262, even if not designed as a safety hardware element.
All outputs feature over-current protection and open-load fault indication. The primary (fixed) LDO features over-voltage protection and thermal protection circuity while the secondary (programmable) LDO has overload, over-temperature, short-circuit and reverse-bias protection. Both have short-to-ground monitoring at startup and continuous regulator-failure monitoring.
The SPSB081 family is AEC-Q100 qualified, specified from -40 to +150 degrees C, and able to operate up to 175 degrees C.
All variants are in production and available in a thermally enhanced 5.0 x 5.0 x 1.0mm QFN32L package.