FS26 datasheet(5/156 Pages) NXP

5 / 156 page

NXP Semiconductors

FS26

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

3 Features and benefits

Operating range

• 40 V DC maximum input voltage

• Supports operating voltage range down to battery 3.2 V with VBST in front-end

• Supports operating voltage range down to battery 6 V without VBST in front-end

• Low-power LPOFF mode with 30 µA quiescent current

• Low-power standby mode with 29 µA quiescent current with VPRE active. LDO1 or LDO2 activation

selectable via OTP configuration. GPIO1 or GPIO2 activation selectable via SPI communication.

Power supplies

• VPRE: Synchronous buck converter with integrated FETs. Configurable output voltage and switching

frequency, output DC current capability up to 1.5 A and PFM mode for Low-power standby mode operation.

• VCORE: Synchronous buck converter with integrated FETs. VCORE is dedicated for microcontroller core

supply. Output DC current up to 0.8 A or 1.65 A (depending on part number), output voltage range setting

from 0.8 V to 3.35 V.

• VBST: Asynchronous boost controller with external low-side switch, diode, and current sense resistor. VBST

is configurable as front-end supply to withstand low voltage cranking profiles or in back-end supply with

configurable output voltage and scalable output DC current capability.

• LDO1: LDO regulator for microcontroller I/O support with selectable output voltage between 3.3 V and 5.0 V

and up to 400 mA current capability.

• LDO2: LDO regulator for system peripheral support with selectable output voltage between 3.3 V and 5.0 V

and up to 400 mA current capability.

• VREF: High-precision reference voltage with 0.75 % accuracy for External ADC reference and internal

tracking reference.

• TRK1 and TRK2: Voltage tracking regulators with selectable output voltage between VREF, LDO2, or Internal

LDO reference. Supports high-voltage protection for ECU off- board operation. Each tracker has a current

capability up to 150 mA.

System support

• Two wake-up inputs with high-voltage support for system robustness

• Two programmable GPIO with wake-up capability or HS/LS driver

• Programmable long duration timer (LDT) for system shutdown and wake-up control

• Monitoring of system voltages (Including Battery voltage monitoring) through the analog multiplexer

• Selectable wake-up sources from: WAKE/GPIO pins, LDT, or SPI activity

• Device control via 32-bit SPI interface with cyclic redundancy checks (CRC)

Compliance

• Electromagnetic compatibility (EMC) optimization techniques for switching regulators, including spread

spectrum, slew rate control, and manual frequency tuning.

• Electromagnetic interference (EMI) robustness supporting various automotive EMI test standards.

Functional safety

• Scalable portfolio from automotive safety integrity levels (ASIL) B to D

• Independent monitoring circuitry, dedicated interface for microcontroller monitoring, simple or challenger

watchdog function

• Analog built-in self-test (ABIST1) and logical built-in self-test (LBIST) at startup

• Analog built-in self-test (ABIST2) on demand

• Safety outputs with latent fault detection mechanism (RSTB, FS0B, FS1B)

FS26_SDS

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

Product short data sheet

Rev. 6.0 — 12 December 2025

Document feedback

5 / 156

FS26 Datenblatt(PDF) 5 Page - NXP Semiconductors

FS26 Datenblatt(HTML) 5 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datenblatt Download

Link URL