STPM098C-TR [STMicroelectronics]

STPM098C is a dual-loop digital multi-phase buck controller with built-in NVM and PMBus™ interface for automotive applications.

The product finds application in the power management of loads that require high power, such as cores of processors and memories. It controls up to 8 external drivers+MOS and, with its two loops, allows to supply up to two different voltages.

An advanced control loop architecture based on COT (constant on-time) scheme provides fast transient responses and high efficiency. The device also provides phase interleaving and dynamic phase add/drop for efficiency enhancement for light load range.

STPM098C supports a ver.1.2 compliant PMBus™ communication with 8 possible interface address values for reporting the telemetry of voltage, current, power, temperature and fault signaling.

The device programmable parameters can be configured through the PMBus™ interface and stored in an on-chip NVM minimizing external components.

STPM098C additionally provides an extensive monitoring unit system and fault protection including independent UV/OV on output voltage, loop feedback disconnection, phase current unbalancing and dual-threshold overcurrent for both positive and negative phase currents.

• AEC-Q100 qualified
• Phase assignment between two loops: 8+0 to 4+4
• Output voltage range: 0.5 V to 2 V
• Switching frequency range: 200 kHz to 1.5 MHz
• Programmable dynamic phase shedding operation for light loads and active diode emulation for very light loads
• High-performance digital control Loop
• Embedded CPU ARM Cortex™ M0+ at 40 MHz
• Embedded NVM (nonvolatile memory)
• PMBus™ rev 1.2 (max freq. 400 kHz)
• Full ISO26262 compliant, ASIL-D systems ready
• Protection and diagnostic
  • PMBus™ readable input telemetry (voltage, current, power)
  • PMBus™ configurable overcurrent, undervoltage and over-power diagnostics and protection on input metrics
  • PMBus™ readable output telemetry (voltage, current, temperature) for each loop
  • PMBus™ configurable under/overcurrent, under/overvoltage diagnostics and protection on output metrics for each loop
  • PMBus™ configurable thermal warning and thermal shutdown diagnostics and protection on the output stage for each loop
  • PMBus™ readable single-phase current telemetry
  • PMBus™ configurable single-phase overcurrent diagnostics and protection
  • PMBus™ configurable general-purpose UV/OV diagnostic thorough pin AUX_SENSE
  • Feedback loop disconnection diagnostics
  • Internal overtemperature diagnostics and protection
  • PMBus™ readable T_j measurement
  • Ground loss diagnostics
  • System clock monitoring
  • Power supply pins VCC, VREF1, VREF2 overvoltage and undervoltage diagnostics
  • Fault status flag output through SM_ALERT, FAULT, VRRDY1, VRRDY2 pins