NXP Semiconductors
S32K344
White Board
6 Power supply
The White Board requires an external power supply of 12V/1A, which is fed to the
following devices on the board.
• SBC FS26 – it powers the MCU with 5V (MCU VDD_HV_A domain), 3.3V (MCU
VDD_HV_B domain) and 1.5V (MCU core). See following figure for SBC power supply
topology.
– SBC generates 5V(Tracker1 and Tracker2) to power the CAN phys (optional). The
CAN phys are powered by VCC1_5V0 by default.
• 5V buck circuit – it is used as a backup 5V power supply.
• 3.3V buck circuit – it powers the ethernet switch and ethernet phy circuits.
– The 3.3V is supplied to the standalone 1.2V LDO, which powers the ethernet switch
core.
• High side driver (XS6500) – it requires 12V to operate correctly.
• LF driver (NJJ29C2) – it requires 12V to operate correctly.
Power supply topology of this board is shown in the following two figures.
Figure 5. SBC power supply topology
UM11919 All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved.
User manual Rev. 1.0 — 11 April 2023
COMPANY PUBLIC 11 / 32
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