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ARG81402: Multi-Output Regulator with Buck Pre-Regulator, 5× LDO Outputs, Watchdog, and SPI

ARG81402 ECAD Model Type Image
ARG81402 Datasheet
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Description

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Packaging

The ARG81402 is designed to provide power to loads such as microprocessors, sensors, and communication transceivers, and is ideal for both Automotive and Industrial applications.The device is in a small footprint 5x5mm package, and offers a high level of integration, including:

  • Synchronous buck 5.35V pre-regulator
  • Five LDO outputs
  • Configurable Watchdog: pulse period, window and Q&A watchdog timer
  • Dedicated pins for a power-on reset output (NPOR), a self-generated Safe State output, and a fault flag output to alert the microprocessor that a fault has occurred.

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.

ASIL Logo

ARG81402 was developed in accordance with ISO 26262:2011 as a hardware safety element out of context with ASIL D capability (pending assessment) for use in automotive safety-related systems when integrated and used in the manner prescribed in the applicable safety manual and datasheet.
  • 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
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Part Number Specifications and Availability