NXP Semiconductors FS26 Family

The FS26 family of automotive safety system basis chip (SBC) devices offer multiple power supply options designed to support entry and mid-range safety microcontrollers like the S32K3 series. FS26 devices also enable other microcontrollers targeting automotive electrification such as powertrain, chassis, safety and low-end gateway applications. The FS26 features multiple switch mode regulators as well as LDO voltage regulators to supply the microcontroller, sensors, peripheral ICs and communication interface. FS26 offers a high-precision voltage reference available to the system and a reference voltage for 2 independent voltage-tracking regulators. In addition, various functionalities are available for system control and diagnostics such as analog multiplexer, GPIOS and selectable wake up events from I/O, long duration timer or SPI communication. The FS26 is ISO 26262 compliant, covering ASIL B and ASIL D safety integrity levels. It features multiple fail-safe outputs, becoming a full part of a safety-oriented system partitioning, along with the latest on-demand latent fault monitoring. These are new added parts to the original FS26 Family.

Key features

• 40 V DC maximum input voltage
• Handle severe cranking operation (3.2 V battery)
• BOOST controller
• Low power Off mode with very low sleep current (30 uA typ.)
• Low power standby mode, VPRE active
• LDO1 or LDO2 active selectable via OTP configuration (25 uA typ.)
• Multiple switch mode regulators as well as LDO voltage regulators
• System added value : LDT, AMUX, Dual Tracker, Vref
• Programmable long duration timer (LDT) for system turn-off/wake-up control
• Selectable wake-up sources from: WAKE/GPIO pins, LDT or SPI activity
• Functional safety automotive safety integrity levels ASIL B to ASIL D
• Enable latent fault monitoring when system is running: ABIST on-demand
• Independent monitoring circuitry
• Dedicated interface for microcontroller monitoring
• Simple and challenger watchdog function
• Safety outputs with latent fault detection mechanism (RSTB, FS0B, FS1B)
• LQFP48 pins with exposed pad for optimized thermal management
• Permanent device customization via one-time-programming (OTP) fuse
• Temporary OTP emulation mode for system development and evaluation
• Ready to use S32K3 + FS26 hardware and
• NXP Product Longevity 15-year program

Applications

• Automotive advanced exterior lighting
• Hybrid Electric Vehicle (HEV) applications
• Active suspension
• Battery Management System (BMS)
• Automotive zone controller
• Electric Vehicle (EV) traction inverter
• Transmission and gearbox
• Electric pumps
• Heating Ventilation and Air Conditioning (HVAC)
• Electric Power Steering (EPS)