STPM098C数据手册ST中文资料规格书

描述 Description

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.

特性 Features

• 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 Tj 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