The MPM85000 is an automotive system power management device intended for integration into an Electrical Control Unit (ECU). The MPM85000 includes a very low-power Sleep Mode, supporting wakeup transitions to Active Mode due to multiple signals. Wakeup event signal detection and qualification includes both glitch protection and power supply
validation. Qualified inputs can generate interrupts for an External Host Controller (EHC).

The MPM85000 supports all MOST speed grades (MOST25, MOST50, and MOST150). In addition to system power management, other MOST-related features are supported, including: direct connection to power status inputs of MOST Intelligent Network Interface Controllers (INICs), MOST50 electrical network (ePHY) activity detection, and ECL support.
 
In Active Mode, the MPM85000 includes a fault-tolerant keep-alive hardware signal (or software bit) that can be used by an external device to keep power enabled until the application is ready to power-down. The MPM85000 also provides continuous monitoring of the application battery voltage and ECU temperature, and can alert the EHC when user-programmed thresholds are crossed.

For robust fault tolerance, stuck wakeup events can be ignored, allowing the MPM85000 to revert to Sleep Mode. The MPM85000 detects recovery from stuck
conditions and re-enables a signal’s ability to wakeup the device.

• Low-cost, single-chip solution, including all peripheral MOST® network interface functions:
  • Diagnostics
  • Status monitoring
  • Power supply
• Supports all INICs (Intelligent Network Interface Controllers) and NICs (Network Interface Controllers)
• Compliant with the MOST Specification
• LIN transceiver compliant with the MOST Electrical Control Line (ECL) specification
  • LIN 2.0-compliant
  • Over-temperature, under-voltage and short-circuit protection Supports Ring Break Diagnosis (RBD)
  • For customer-specific wake-up and diagnostic communication
• Status monitoring
  • Power supply monitoring (low-, critical-, and super-voltage detection)
  • Configurable trip point adjustment for battery voltage comparators
  • Switch-To-Power (STP) detection and signaling
  • Status reporting via PS0/PS1 to INIC
  • Activity detection at ePHY (electrical Physical) interfaces
  • Wake-up event detection at ePHY and oPHY (optical Physical) interfaces
  • Temperature monitoring
• System reset generator
• Optional control of the external main power regulators
• Internal 3.3 V micro-power regulator to supply the oPHY receiver
• Typically 45 μA power consumption in Sleep mode
• I²C™-compatible interface (SMBus interface) for:
  • Configuration
  • Status reporting
• Internal One-Time-Programmable (OTP) memory
  • Storage of user-configurable threshold settings for temperature and supply voltage monitoring
• 24-pin (4 x 4 mm2), QFN lead-free, RoHS-compliant package
• Temperature range -40 °C to +105 °C