FS26 datasheet(7/156 Pages) NXP

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NXP Semiconductors

FS26

Safety system basis chip with low power for ASIL D/ASIL B

4 Simplified application diagram

Figure 2 shows a simplified block diagram for a typical system with an FS26, using the boost controller to

support battery cold-crank events.

aaa-045446

VBAT

Wake up sources

(GPIOx, Wakex, SPI,

long duration timer)

FS26

LOAD

VCORE

INTB

VDDIO

ACTUATORS

FOR

SAFE STATE

ANALOG

SENSOR #1

off board domain

ANALOG

SENSOR #2

VPRE

MCU

FAIL SAFE

STATE MACHINE

FS0B

RSTB

FS1B

FCCU1

FCCU2

WAKE

Analog and digital

monitoring

VCORE

VBST

LDO1

LDO2

SPI

ADC

VREF

TRK1

TRK2

Figure 2. Example of application diagram with VBST as a front-end regulator

Figure 3 shows a simplified block diagram for a typical system with an FS26, using the boost controller to

generate a voltage above the high-voltage buck output voltage.

FS26_SDS

All information provided in this document is subject to legal disclaimers.

Product short data sheet

Rev. 6.0 — 12 December 2025

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