SPSB100BTR [STMicroelectronics]

The SPSB100 is a fully integrated automotive power management system IC, especially designed for highly integrated application processors (for example, Stellar G and P MCU families), offering low power mode and high current capability: the device comes with enhanced system power supply functionality.

It combines a 3-switch mode power supply together with two integrated linear voltage regulators. The device integrates a further 2 wake-up inputs and advanced fail-safe functionalities.

The boost controller is intended only to sustain cold cranking pulses, start stop and weak battery conditions for a transitory time.

Different combinations enable to supply the system microcontroller, external peripheral loads and sensors in several and adjustable voltage and current ranges. SPSB100 is delivered out of ST factory with default values (rails, power-up and down sequences) stored in USER-NVM space as reported in system supply configuration 1 for SPSB100B and in system supply configuration 2 for SPSB100P, but can be also reprogrammed by customers based on different application needs.

The ST standard SPI interface allows control and diagnosis of the device and enables generic software development.

The device offers a set of features to support applications that need to fulfill functional safety requirements as defined by Automotive Safety Integrity Level (ASIL).

• AEC-Q100 qualified
• 2 configurable (6.5 V, 5 V, 3.3 V) BUCK converters and typ peak switching current limit of 3.0 A at 2.4 MHz or 400 kHz
• 1 configurable (3.3 V, 1.25 V, 1.2 V, 1.1 V, 0.98 V) BUCK converter and typ peak switching current limit up to 6.0 A at 2.4 MHz, with fine-tuning configurability around 0.98 V (0.95 V to 1.01 V)
• Overcurrent detection and limitation for all BUCKs
• Integrated soft start on BUCK stages
• Boost controller 8-9.5 V and typ peak switching current limit of 4.2 A at 400 kHz, for sustaining low battery condition occurring for a transitory time and deep cranking pulse (external power components can be optionally populated)
• One 5 V voltage regulator (120 mA, 2% acc.)
• One configurable (5 V or 3.3 V) low drop voltage tracker of all regulators (10 mA, ±10 mV)
• One high side driver for contact monitoring (R_ON = 55 Ω) with open-load and overcurrent diagnosis
• Dedicated interrupt pin for failure communication
• Device operates in low power mode
• Very low quiescent current in DEEP-SLEEP state
• MCU reset generator
• Configurable window watchdog with extended long open window up to 9 s and enable/disable function through NVM bit
• Device contains temperature warning and protection
• Thermal clusters
• A/D conversion of supply voltages and internal temperature sensors
• STMicroelectronics standard serial peripheral interface (32 Bit/ST_SPI) including 4-bit CRC
• 1 fail-safe output
• 1 input pin supporting static and dynamic error signal reporting
• Programmable periodic system wake-up feature
• Documentation available for customers that need support when dealing with ASIL requirements as per ISO26262
• VFQFN56+4L 8x8x0.9 with wettable flank, 0.8 mm package