New PMIC for demanding automotive applications

The OPTIREG PMIC portfolio facilitates highly efficient voltage regulation, offering pre- and post-regulator architectures with DC-DC and linear regulators and trackers. In addition to the power supply, extra monitoring and control functions are integrated, allowing customers to develop automotive ECUs for safety-related applications. To further support developers, Infineon Technologies AG is now expanding the PMIC family with the OPTIREG PMIC TLF35585, an integrated multi-rail power supply solution for demanding automotive systems. The TLF35585 supplies a reliable power supply for AURIX and other MCUs and enables robust systems with the highest functional safety requirements. The new power supply solutions are, therefore, ideal for functional safety applications in harsh automotive environments, especially in the chassis, powertrain, domain control and transmission areas.

The TLF35585 PMIC includes a boost buck pre-regulator that provides the post-regulator rails for the MCU supply, communication supply and a precise voltage reference. It also provides two trackers that follow the voltage reference to supply off-board sensors. The main supervision functions of the device include a configurable window watchdog (time-based trigger), a function watchdog (question and response-based trigger), error pin monitoring and voltage monitoring. For the interaction with MCUs, a 16-bit SPI, interrupt and reset function are also available. The device complies with ISO 26262 for systems up to ASIL D and supports an extended junction temperature range of up to 175C. The wide switching frequency range allows optimisation of efficiency and the use of small filter components. Also, the IC integrates a flexible state machine, the wake-up concept with timer and a stand-by regulator, making the device suited for a wide range of applications.

The OPTIREG PMIC TLF35585 is available in either a small VQFN-48 package or a TQFP-48 package – both packages are thermally enhanced and fully AEC-Q100 qualified (Grade 0).