FS26 datasheet(104/156 Pages) NXP

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NXP Semiconductors

FS26

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

18.5 LDO1 and LDO2: LDO regulators

LDO1 and LDO2 are linear voltage regulators with output voltage between 3.3 V and 5.0 V selectable via OTP,

and with up to 400 mA output current capability.

The LDOIN pin is the input voltage supply for both LDO1 and LDO2, and it is intended to be connected to the

VPRE output. An overcurrent detection and a thermal shutdown protection are integrated in each LDO.

These regulators are intended to supply microcontroller rails, CAN or FLEXRAY transceivers, as well as other

integrated circuits within the ECU.

During standby mode, LDOs can be enabled (based on OTP configuration) with minimum additional power

consumption.

When the output current rises above the ILIM_LDOx threshold, the corresponding SPI bit LDOxOC_I is set. An

overcurrent detection does not turn OFF the corresponding LDO, but will induce an output voltage drop.

LDO1 AND LDO2

VLDO1

VLDOIN

COUT_LDO1

VLDO2

COUT_LDO2

CIN_LDO

aaa-045468

Figure 31. LDOx block diagram

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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FS26 Datenblatt(PDF) 104 Page - NXP Semiconductors