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Automotive Multi-Output Regulator with Buck Pre-Regulator, LDOs, and SPI

ARG81402

ARG81402 Product Image

The ARG81402 simplifies power supply design for automotive and industrial applications, integrating a buck pre-regulator, multiple LDOs, a configurable watchdog timer, and SPI control for robust and reliable performance.

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Top Features

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  • Control and diagnostic reporting through a serial peripheral interface (SPI) 
  • Wide input voltage range (6 to 36 VIN operating range, 40 VIN maximum)
  • 2.2 MHz Synchronous buck 5.35V pre-regulator (VREG) for integration and efficiency
  • Five internal linear regulators with foldback short-circuit protection 
    • 3.3V and 4x 5V outputs (one with short- to-battery protection for remote sensors)
  • OV and UV protection for all output rails provide the ability to monitor health of outputs
  • Pin-to-pin and pin-to-ground tolerant at every pin
  • Three configurable watchdogs with fail-safe features: pulse period, window, Q&A watchdog
  • Power-on reset signal (NPOR) indicating a fault on the 3.3V output, the optional 1.3V input monitor (for self-powered core voltage) and a watchdog failure 
  • Safety signal (POE) can disable a separate function (e.g., Motor Driver) due to a Watchdog Failure

The ARG81402 is supplied in a low-profile 32-lead, 5 mm × 5 mm, 0.5 mm pitch QFN package (suffix “ET”) with exposed thermal pad and wettable flank to allow solder joint inspection.

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