FS26 datasheet(26/156 Pages) NXP

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NXP Semiconductors

FS26

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

14.1 Total battery current consumption estimation in Standby mode

The standby mode current consumption can be estimated using Figure 10 and Figure 11 at TA = 25 °C and TA =

85 °C, depending on the use case. The measurements were made 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.

• All regulators unloaded.

(µA)

IQ_Battery

_STBY

[1],[2]

VPREPFM (V)

3.20

5.45

4.95

5.20

4.20

4.45

4.70

3.45

3.70

3.95

aaa-045508

TA = 85 °C

TA = 25 °C

Figure 10. Battery current consumption in standby mode (LDO1 and LDO2 disabled)

VPREPFM (V)

3.65

5.65

5.05

5.25

4.25

4.05

4.85

4.45

4.65

3.85

aaa-045509

ILDOx_

_STBY

[1],[2]

(µA)

TA = 85 °C - VLDOx = 5 V

TA = 25 °C - VLDOx = 5 V

TA = 25 °C - VLDOx = 3.3 V

TA = 85 °C - VLDOx = 3.3 V

Figure 11. LDOx current consumption in standby mode

When LDOx is used at 5 V, VPRE output voltage in standby mode must be 5.35 V to comply with the LDOx

minimum dropout voltage. 1 2

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

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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