NXP Semiconductors

FS8600_SDS

Fail-safe system basis chip with multiple SMPSs and LDOs

2 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 through XFAILB pin

• 10 ms optional RSTB release delay during power up for certain MCU compliancy

• Device control via 32 bit I2C interface with 8-bit CRC

Compliancy

• EMC optimization features 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 (FCCU)

• External IC failure monitoring (ERRMON)

FS8600_SDS

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Product short data sheet

Rev. 2.0 — 7 December 2022

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