ARG81400: Multi - Output Regulator with Buck or Buck/Boost Pre - Regulator, Synchronous Buck, 5 x "Outputs, Watchdog, and SPI

The ARG81400 is rated up to 50 v input and provides 6 total outputs. There are 5 LDOs, and post a regulated DC/DC switcher to power MCUs, as well as a watchdog, and SPI. Designed for high - temperature operation, The ARG81400 is ideal for Automotive and Industri亚博尊贵会员al applications.

The device USES a buck or buck/boost pre - regulator to efficiently feed five linear regulators - 3.3 V / 90 mA, 5 V / 200 mA, 5 V / 30 mA, 5 V / 55 mA, and 5 V / 100 mA (short - 'protected) - and an adjustable output, 600 mA synchronous buck.

The Diagnostic outputs from the ARG81400 include a power - onreset output (NPOR), and a fault flag output to alert the microprocessor that a fault has occurred. The microprocessor can read fault status through the SPI.

The ARG81400 contains a Window Watchdog timer with a programmable detect period. It enters an active state after NPOR transitions high and The processor has exercised The WD Test routine. The Watchdog can be put into flash mode or be reset via secure SPI commands

Protection, the features include undervoltage and overvoltage on all the output rails. In case of a shorted output, all linear regulators feature foldback overcurrent Protection. In addition, the V5P output is protected from a short - to - 'event. Both switching regulators include pulse - by - pulse current limit, hiccup mode short - circuit Protection, LX short - circuit Protection, and thermal shutdown.

• A2 - SIL ™ compliant - device features for safety critical systems
• Automotive AEC - Q100 qualified
• Wide input voltage range, 3.8 to 40 VIN operating range, VIN maximum 50
• Buck or Buck/boost pre - regulator (VREG)
• Adjustable 1.25 to 3.3 V synchronous buck for powering a MCU
• Four internal linear regulators with foldback short - circuit protection, 3.3 V (3 v3) and three 5 V (V5CAN V5A, and V5B)
• One internal 5 V linear regulator (V5P) with foldback short - circuit and short - to - 'protection
• Pin - to - Pin and Pin - to - ground tolerant at every Pin
• Power - on the reset signal indicating a fault on the synchronous buck, 3 v3 or V5A regulator outputs (NPOR)
• Window watchdog timer with fail - safe the features
• The Control and the diagnostic reporting through a serial peripheral interface (SPI)
• Safety signal (POE) can disable a separate function (e.g., Motor Driver) due to a Watchdog Failure
• Frequency dithering and controlled slew rate else reduce EMI/EMC
• The OV and UV protection, for all the output of the rails