General description
The FS86 device family, SW compatible with FS84/85 family, expands the power
capability, the safety integration and system scalability of domain controller applications
to address the multiple MCU requirements present in ADAS and Electrification.
The FS86 includes multiple switch mode and linear voltage regulators and enhanced
safety features with Fail-Safe outputs. The latest NXP HV Buck architecture features
a 15 A capability with e-fuse protection to shut down the system power to prevent
any damage in case of a harmful event. The ability to monitor ten voltages with
+/-1% accuracy extends the system safety concept by allowing QM rails from others
components to be monitored.
With its innovative synchronization feature, the FS86 is part of the BYLink System
Power Platform, enabling a new smart approach to designing Safe System Power
Management. It provides power, safety and system scalability to ease platform
development strategies. Cascaded system SBC/PMICs behave as ONE with safety and
sequencing synchronization.
The FS86 is part of a complete family of devices that offer scalability in power and safety,
and provide pin-to-pin and software compatibility. It is developed in compliance with the
ISO 26262 standard and is qualified according to AEC-Q100 requirements.

Features and benefits
Operating Range
• 60 V DC maximum input voltage for 24 V battery network applications
• 36 V DC maximum input voltage for 12 V battery network applications
• Support operating voltage range down to 4.5 V battery voltage with VPRE = 3.3 V
• Low Power OFF mode with low sleep current (10 μA typ.)
Power Supplies
• VPRE: Synchronous high voltage buck controller with external FETs
– Configurable output voltage from 3.3 V to 5.0 V and current capability up to 15 A DC
– Selectable switching frequency in force PWM with APS
• BOOST: Low voltage boost converter with integrated low-side FET
– Configurable output voltage from 5 V to 6 V and current capability up to 1 A DC
• BUCK: Low voltage integrated synchronous BUCK converter
– Configurable output voltage from 1.0 V to 3.3 V and current capability up to 2.5 A DC
• LDO1: Low voltage LDO regulator for MCU I/O and system peripheral support with load
switch capability
– Configurable output voltage from 1.5 V to 5.0 V and current capability up to 400 mA
DC
• LDO2: Medium voltage LDO regulator for MCU I/O and system peripheral support
– Configurable output voltage from 1.1 V to 5.0 V and current capability up to 400 mA
DC
System support
• 2x input pins for wake-up detection, 3.3 V compatible and battery voltage sensing
capability
• Analog Multiplexer with full System Voltages monitoring
• Enhanced leader/follower power up sequencing management thru XFAILB pin
• 10 ms optional RSTB release delay during power up for certain MCU compliancy
• Device control via 32 bits I2C interface with 8-bit CRC
Compliancy
• EMC optimization techniques on switching regulators including spread spectrum, slew
rate control and manual frequency tuning
• EMI robustness supporting various automotive EMI Test standards
• Conducted Emission: IEC 61967-4
• Conducted Immunity: IEC 62132-4
• Radiated emission: FMC1278 rev. 3 from 2018
• Radiated immunity: FMC1278 from 2018 and ISO11452-4
Functional Safety
• Scalable portfolio to fit for ASIL B to ASIL D Automotive Safety Systems
• Independent voltage Monitoring Circuitry
• Up to 10 voltage monitoring input for FS86 and external PMIC voltage rails with 1 %
target accuracy
• Dedicated interface for MCU monitoring with simple or challenger watchdog monitoring
• MCU hardware failure monitoring with PWM monitoring capability
• External IC failure monitoring
• Logical and Analog Built-in Self-Test
• Safety Outputs with latent fault detection mechanism (PGOOD, RSTB, FS0B)
Configuration and Enablement
• QFN 48 pins with exposed pad for optimized thermal management
• OTP programming for device customization

Applications
• Domain controller (ADAS, electrification, Infotainment, etc.)
• Radar (radar, imaging radar)
• Vision (mono camera, stereo camera, night vision, etc.)
• 24 V battery network (60 V maximum): Truck, bus, transportation
• 12 V battery network (36 V maximum): Automotive