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Target Applications
• Advanced power train
• Electric power steering
• Safety critical motor control
applications
• Safety domain control
• Vehicle dynamic and chassis
control
Analog, Mixed Signal and Power Management
MC33907 and MC33908
Safe and efficient system basis chips (SBCs)
for safety critical 32-bit MCU applications
Overview
The MC33907 and MC33908 are multi-output power supply integrated circuits
(ICs) with HSCAN and LIN transceivers optimized for safety critical applications.
Multiple switching and linear voltage regulators are available, including
low power modes with various wake up capabilities. An advanced power
management scheme is implemented to maintain high efficiency over wide input
voltages and output current ranges.
Enhanced safety features and multiple fail-safe outputs enable safety oriented
system partitioning in the MC33907 and MC33908 devices. A built-in enhanced
high-speed CAN interface fulfills ISO 11898-2 and -5 standards. Local and bus
failure diagnostics, protection and fail-safe operation modes are provided. The
LIN interface fulfills LIN protocol specifications 2.0, 2.1 and SAEJ2602-2.
MC33907 and MC33908 Block Diagram
MC33907 and MC33908 Block Diagram
Auxillary Vreg—Vaux
DC/DC
Pre-Regulator
Buck Only or Buck Boost
Internal Power
FET
Low Power Mode
Power Management
Functional Safety
Flexible (I/O)
Wake/INH
Static and Dynamic Safe Pins
Fail-Safe State Machine
Flexible (I/O)
Debug Pin
Communication
MCU I/O Vreg—Vcca
MCU Core Vreg
Configuration Vcore
CAN Vreg
Analog MUX
CAN High SpeedLIN/J2602Advanced SPI
