FS26 datasheet(27/156 Pages) NXP

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NXP Semiconductors

FS26

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

The total standby mode current consumption can be estimated at either TA = 25 °C or TA = 85 °C using the

following formula:

where N is the number of LDOx used.

14.2 Standby mode current consumption

In most cases, LDO1 or LDO2 regulators are used in standby mode to supply light loads.

The total battery current consumption can be estimated using Figure 12 at TA = 25 °C and TA = 85 °C,

depending on the LDO1 or LDO2 load. The measurements have been done with the following assumptions:

• VSUP = VSUP_PWR = 12 V.

• LPRE = 10 µH

• Long duration timer disabled.

• GPIOx disabled in standby.

• RSTB released and pulled up to VPRE.

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

• LDO1 and LDO2 enabled.

• VLDO1 = 3.3 V, VLDO2 = 5 V and VPRE_PFM = 5.35 V.

• No external load on VPRE.

(µA)

IQ_Battery

_STBY

[1],[2]

Iout_LDO1 or 2 (µA)

100

aaa-045510

100

120

TA = 85 °C

TA = 25 °C

Figure 12. Total battery current consumption in standby mode

The total battery current consumption can also vary depending on the chosen inductor for LPRE. The additional

measurements shown in Section 14.2 were made using the following assumptions (see Figure 13):

• Long duration timer disabled

• GPIOx disabled in standby

• RSTB released and pulled up to VPRE

• VSUP = VSUP_PWR = 12 V

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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