Documentation available to aid ISO 26262 system design up to ASIL D
Systematic capability and hardware integrity up to ASIL D
Input voltage range
5 to 36V for initial power up
3.5 to 36V full functionality after initial power up, limited operation to 2.3V
Output Supply Rails
Synchronous buck-boost preregulator with configurable spread-spectrum, 4.3V, 5 V, 6V or 6.8V and low IQ mode with the following options:
2.8A in buck mode (option 0 variant)
1.5A in buck mode (option 1 variant)
Four LDOs: 1.0V to 1.8V in 50mV steps, 2.5 V, 3.0V, 3.3V, 5V, bypass or voltage monitor mode. Each LDO with independent configurable current limit.
LDO1 and LDO2: Low IQ, up to 600mA
LDO3 and LDO4: low noise, low IQ, 1% accuracy, up to 225mA
Two protected LDOs for sensor or peripheral supplies, PLDO1 and PLDO2
Configurable for tracking mode or fixed output/VMON mode configurable for 1.0V to 1.8V in 50mV steps, 2.5V, 3.0V, 3.3V or 5V up to 200mA
Short-to-chassis (–2V) and supply (+36V) protection
Power sequence control:
Configurable power-up and down sequences (NVM default including output voltages)
Output rails, external voltage monitor and external enable signals can be included
Monitoring, protection and diagnostics
Undervoltage and overvoltage monitoring on all regulator outputs, battery voltage, and internal supplies
Two external voltage monitors (pins)
All regulator outputs protected with independent current limit
All regulators protected with independent overtemperature prewarning and shutdown
Watchdog: configurable for open and close window or question-answer
Error signal monitor (ESM) for monitoring MCU error output (PWM and level modes)
SAFE state for device and system protection
Clock monitor for internal oscillators
Analog and logic built-in self-test (BIST)
CRC on non-volatile memory (NVM), device configuration registers, and SPI communication
Diagnostic output pin: multiplexes analog and digital signals to MCU ADC and input
Compare module: 2 channels configurable as general purpose comparators or up to 4 channels of voltage monitoring
Timer (low IQ) for wake-up and measurement, 64µs to 203.6 days
SPI for configuration, status and error reporting
Reset output (NRST), two configurable safing outputs (SAFE_OUTx) for system safe state on detected faults interrupt output (NINT), and power good output (PGOOD)