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Infineon Technologies TLF35585QxS0x OPTIREG™ Functional Safety PMICs

Infineon Technologies TLF35585QxS0x OPTIREG™ Functional Safety Power Management Integrated Circuits (PMICs) are highly efficient devices for automotive safety-relevant applications. The power supply includes a boost-buck pre-regulator supplying post-regulator rails for the microcontroller supply, a communication supply, and a precise voltage reference. In addition, two trackers following the voltage reference are available to supply off-board sensors. The Infineon TLF35585QxS0x OPTIREG™ PMICs come with a configurable window watchdog (time-based trigger) and functional watchdog (question and answer-based trigger), error pin monitoring, and voltage monitoring functions as major supervision functions. A 16-bit SPI and an interrupt/reset function are provided for microcontroller interaction. The device has been developed according to ISO 26262, targeting systems up to ASIL D, and supports an extended junction temperature range of up to +175°C.

Features

  • Highly efficient PMIC
  • Serial step-up/-down pre-regulator for wide input voltage range from 3.0V to 40V with full performance and low overall power loss
  • 3.3V or 5.0V/600mA low drop post regulator for microcontroller main supply (QUC)
  • 5.0V/200mA low drop post regulator for communication supply (QCO)
  • 5.0V/150mA Voltage reference (±1%) for ADC supply (QVR)
  • Two trackers for sensor supply following voltage reference 150mA current capability each (QT1 and QT2)
  • 3.3V or 5.0V/10mA standby regulator (QST)
  • Enable, sync out signal, and voltage monitoring of an optional external post regulator for core supply
  • Independent voltage monitoring block and error pin monitoring
  • Configurable window watchdog and functional watchdog
  • Safe State Control comprises two safe state signals with programmable delay
  • 16-bit SPI, interrupt and reset function
  • High junction temperature operation up to +175°C
  • PG-TQFP-48-10 or PG-VQFN-48-79 package options
  • PRO-SIL™ features
    • ISO 26262 Safety Element out of Context for requirements up to ASIL D
    • Safety documentation for ISO 26262-compliant system integration
  • AEC qualified
  • Green product, RoHS-compliant

Applications

  • Electric power steering
  • Battery management
  • Engine management
  • Domain control
  • Traction inverter

Videos

Block Diagram

Block Diagram - Infineon Technologies TLF35585QxS0x OPTIREG™ Functional Safety PMICs
Published: 2025-01-15 | Updated: 2025-01-21