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Automotive Multi-Output PMIC with Buck/Buck-Boost Pre-Regulator, Synchronous Buck, and SPI Control

A4412

A4412 Product Image

The A4412 simplifies automotive power supply design with its integrated buck/buck-boost pre-regulator, synchronous buck regulator, multiple LDOs, watchdog timer, and SPI control. Offers comprehensive protection and diagnostic capabilities.

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Packaging

  • A2-SIL™ product—device features for safety critical systems
  • Automotive AEC-Q100 qualified
  • Wide input voltage range, 3.8 to 40 VIN operating range, 50 VIN maximum
  • Buck or buck/boost pre-regulator (VREG)
  • Adjustable 1.3 to 3.3 V, 400 mA synchronous buck.
  • Four internal linear regulators with foldback short-circuit protection, 3.3 V (3V3) and three 5 V (V5CAN, V5A, and V5B)
  • One internal 5 V linear regulator (V5P) with foldback short-circuit and short-to-battery protection
  • Power-on reset signal indicating a fault on the synchronous buck, 3V3 or V5A regulator outputs (NPOR)
  • Window watchdog timer with fail-safe features
  • Dual bandgaps for increased safety coverage and fault detection, BGVREF, BGFAULT
  • Control and diagnostic reporting through a serial peripheral interface (SPI)
  • Logic enable input (ENB) for microprocessor control
  • Ignition enable input (ENBAT) with status indicator output
  • Frequency dithering and controlled slew rate helps reduce EMI/EMC
  • OV and UV protection for all output rails
  • Pin-to-pin and pin-to-ground tolerant at every pin

The A4412 is supplied in a low-profile (1.2 mm maximum height) 38-lead eTSSOP package (suffix “LV”) with exposed power pad.

LV Package Documentation

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Part Number Specifications and Availability

Documentation and Resources

Documentation

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Documents Found: 32
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Application Note
Introduction to Allegro SPI