Table 5. Supply pin decoupling capacitors (continued)
Domain name
Supply
Voltage
Minimum Decoupling Capacitors
VDD_HV_RAW
3.3 V
0.1 μF, 1 μF
3.3 V
1000 pF, 0.1 μF, 1 μF
VDD_HV_ADC
3.3 V
0.1 μF, 1 μF
VDD_HV_ADCREF0/2
3.3 V
0.01 μF, 1 μF
VDD_HV_IO_PWM
3.3 V
2x 0.1 μF for each supply
VDD_HV_FLA
3.3 V
0.1 μF, 1000 pF
VDD_HV_PMU
3.3 V
100 nF, 4.7 μF
VDD_HV_REG3V8
3.13 V - 5.5
V
1 μF Ceramic
VDD_LV_DRFPLL
1.25 V
1000 pF, 0.1 μF, 1 μF, 0.01 μF
VDD_LV_IO_AURORA
1.25 V
0.1 μF, 1 μF
VDD_LV_PLL0
1.25 V
1000 pF, 0.1 μF, 1μF, 0.01 μF
VDD_LV_DPHY
1.25 V
Ferrite bead, >5 μF, 100 nF, 1000 pF
1. When using internal regulation mode, assure that the total capacitance (accounting for temperature variations) never falls
below 40 μF
2. External capacitors for the IO pins are dependent on the application.
3. Not present on S32R372 141BGA Package
4. When device is configured in external regulation mode and supply is connected to VDD_HV_PMU. For internal regulation
mode see
SMPS external component configuration
The device has several pins for the connection to external decoupling capacitors for the analog front-end. Details of these can
be found in
3.2 Decoupling capacitors layout priority
When trade-offs must be made in the schematic layout, it is important to ensure that the highest priority supplies have
decoupling capacitors placed as closely as possible to the MCU. The list below outlines the recommended order of the
supplies from highest to lowest priority in terms of their importance for decoupling.
1. VDD_HV_RAW & VDD_HV_DAC
2. VDD_HV_ADCREF0/2
3. VDD_HV_ADC
4. VDD_LV_PLL0
5. VDD_LV_DPHY
6. VDD_LV_CORE
7. VDD_LV_AURORA
8. VDD_HV_PMU
9. VDD_HV_FLA
10. VDD_LV_LFASTPLL
11. VDD_LV_IO
12. VDD_HV_PWM
13. VDD_HV_IO
2. Not present on S32R372 141MAPBGA Package
3. Not present on S32R372 141MAPBGA Package
Power supply
S32R27/37 Hardware Design Guide, Rev. 1, 04/2018
NXP Semiconductors
5