SPSB081 Automotive Power Management IC

STMicroelectronics' SPSB081 is a power management system IC providing electronic control modules with enhanced power management functionality, including various standby modes to minimize the power consumption with programmable local and remote wake-up capability, as well as LIN (only for SPSB0815 and SPSB0813) and CAN FD physical communication layers. The device has one low-drop voltage regulator to supply the system microcontroller and one voltage tracker to supply external peripheral loads such as sensors. V1 is available with a fixed rail (5 V or 3.3 V) and V1 overvoltage detection and protection solution, while V2 is a tracker voltage regulator of V1, programmable by SPI with 5 V or 3.3 V. Moreover, the device features four high-side drivers to supply LEDs and sensors. All outputs are short-circuit (SC) protected and implement open-load diagnosis. The ST standard serial peripheral interface (SPI) allows control and diagnosis of the device and enables generic software development.

Features

• AEC-Q100 qualified
• One 5 V (or 3.3 V for SPSB0813 and SPSB081C3) low drop voltage regulator (V1) for microcontroller and peripheral supply
• One configurable 5 V or 3.3 V, selectable via SPI, low drop voltage regulator V2 tracker for V1 and with off-board protection
• Minimum current limitation of 450 mA for V1 and 400 mA for V2
• No electrolytic capacitor required on regulator outputs
• Very low quiescent current in standby modes (typ. 15 µA)
• Programmable reset generator for power-on and undervoltage
• Configurable window watchdog
• LIN transceivers ISO 17987-4/2016 compliant (only for SPSB0815 and SPSB0813)
• CAN-FD transceiver (ISO 11898-2/2016, SAE J2284 compliant) with local failure and bus failure diagnosis
• Complete 2-channel contact monitoring interface (WU1 and WU2 input pins) with programmable cyclic sense functionality. WU2 also with DIR functionality
• Programmable periodic system wake-up feature
• STM standard SPI (32-bit/ST-SPI)
• 4 HS drivers for 0.14 A (r_on = 7 Ω) suitable to drive external LED modules with high input capacitance value or to also supply external contacts
• Internal 10-bit PWM timer for each standalone high-side driver
• Buffered supply for all voltage regulators
• DIAGN output pin for fail-safe signalization
• Current monitor output for all internal high-side drivers
• Open-load diagnosis for all outputs
• Overcurrent protection for all outputs
• V1 overvoltage detection and protection
• Device contains temperature warning and protection
• Thermal cluster
• Limited documentation available for customers that need support when dealing with ASIL requirements as per ISO 26262