FS26 datasheet(25/156 Pages) NXP

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NXP Semiconductors

FS26

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

14 Current consumption

TA = –40 °C to 125 °C, unless otherwise specified. VSUP_UVH < VSUP < 36 V, VPRE_PWM + VPRE_HDR < VSUP_PWR < 36 V, unless otherwise specified. All voltages

are referenced to ground.

Symbol

Description

Min

Typ

Max

Unit

Quiescent current

IQ_NORMAL

Current consumption in normal mode on the battery:

• VSUP = VSUP_PWR = 13.5 V (including current from BATSENSE pin)

• VBST enabled but not switching.

• VPRE output voltage set at 5.5 V

• LPRE = 10 µH

• VCORE enabled and output voltage set at 1.5 V

• LDO1 enabled and output voltage set at 5.0 V

• LDO2 enabled and output voltage set at 3.3 V

• TRK1 and TRK2 enabled and output voltage set at 5 V

• VREF enabled and output voltage set at 5 V

• Long Duration Timer enabled

• All regulators output current = 0 A

Current consumption in standby mode on the battery

• TA = 25 °C

• TA = 40 °C[2]

• TA = 85 °C[2]

—

µA

IQ_STBY[1]

• VSUP = VSUP_PWR = 12 V, 18 V (including current from BATSENSE pin)

• VPRE_PFM = 3.7 V (PFM mode)

• LPRE = 10 μH

• LDO1 enabled, VLDO1 = 3.3 V

• LDO2 disabled. Typ 3 μA additional on VSUP when enabled at 3.3 V

• Long Duration Timer disabled, < 1 µA when enabled.

• GPIOx disabled in standby

• RSTB released, pulled up to VPRE_PFM

• FS0B = 0 and FS1B = 0 pulled up to a disabled supply in standby mode.

Current consumption in standby mode on the battery

• TA = 25 °C

• TA = 85 °C[2]

110

—

130

µA

IQ_STBY

• VSUP = VSUP_PWR = 5.4 V (including current from BATSENSE pin)

• VPRE_PFM = 3.7 V and 5.05 V (PFM mode)

• LPRE = 10 µH

• LDO1 enabled, VLDO1 = 3.3 V when VPRE_PFM = 3.7 V, VLDO1 = 5.0 V when VPRE_PFM =

5.05 V.

• LDO2 disabled. Typ 3 μA additional on VSUP when enabled at 3.3 V

• Long Duration Timer disabled. < 1 µA when enabled.

• GPIOx disabled in standby

• RSTB released, pulled up to VPRE_PFM

• FS0B = 0 and FS1B = 0 pulled up to a disabled supply in standby mode.

Current consumption in LPOFF mode and Deep Fail Safe (DFS) state on the battery

• TA = 25 °C

• TA = 40 °C[2]

• TA = 85 °C[2]

—

µA

IQ_LPOFF, IQ_DFS

• VSUP = VSUP_PWR = 5.4 V, 12 V, 18 V

• (Including current from BATSENSE pin)

• All regulators are disabled.

• Long Duration Timer disabled. < 1 µA when enabled.

• GPIOx disabled in LPOFF

Table 9. Electrical characteristics

[1]

VBAT current is reduced in standby mode due to the ratio between VBAT and VPRE voltages.

[2]

Guaranteed by characterization. Tested in production at 25 °C only.

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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