Power
Jetson AGX Xavier Series Product
DG-09840-001_v2.5 | 19
Power Rails
Usage
(V)
Power Supply
Source
VDDIO_AO_3V3
SoC VDDIO_AUDIO_HV and VDDIO_AO_HV rails
3.3
PMIC LDO2
SYS_VIN_MV
VDD_EMMC_3V3
eMMC device 3.3V rail
3.3
PMIC LDO3
SYS_VIN_MV
VDD_USB_3V3
SoC AVDD_USB rail
3.3
PMIC LDO5
SYS_VIN_MV
VDD_SDIO_3V3
SoC VDDIO_SDMMC1_HV and
VDDIO_SDMMC3_HV rails
3.3
PMIC LDO6
SYS_VIN_MV
DDR_VDD2_1.1V
SoC VDDIO_VDD2_DDRx and DRAM VDD2 rails.
1.1
LTC3636
SYS_VIN_HV
VDD_DDRQ
VDDIO_DDRxLV and LPDDR4x VDDQ rails
0.6 LPDDR4x LTC3636
SYS_VIN_HV
Notes:
1.
SoC AVDD_PLL_NVHS_EUTMIP, VDD_HDMI_DP_PLL_0_1/1_3, PEX_HVDD, NVHS0_HVDD and NVHS0_PLL0_HVDD rails
2.
SoC VDDIO_UART/AUDIO/SDMMC4/DMMC3_HV_VCLAMP/ VDDIO_SDMMC1_HV_VCLAMP/CONN/EQOS/QSPI/,
AVDD_PLL_AA1_CV_ADC/DD2D3D4DPHBCS/CC2C3PADC_BPMP/C4_REFE, eMMC device VCCQ and QSPI device VDD rails.
3.
These rails are sourced from the PMIC Switcher SD2 used for VDDIO_SYS_1V8LS which is sourced from SYS_VIN_MV.
4.
SoC VDDIO_EDP/PEX_CTL/DEBUG/CAM/AO/VREFR0/ SYS, VPP_FUSE, AVDD_PLL_AON/MSC/GADC_M/MSD/XADC_MSB,
VCLAMP_USB, AVDD_OSC, LPDDR4x device VDD1, Temp Sensor VDD
5.
Enable (RUN2 pin) for VDD_DDRQ supply and Enable for discharge of DDR_VDD2_1.1V,
VDDIO_SYS_1V8HS/SYS_1V8LS/AO_1V8 rails.
5.2
Power Sequencing
The following list describes the basic power on sequencing requirements.
The main power source for the system is applied. The
SYS_VIN_HV
and
SYS_VIN_MV
are
derived from this power source. Optionally, these supplies can be gated and only enabled
to the module when a signal (such as
VIN_PWR_ON
) is enabled. This can help avoid damage
if the module is inserted when main power is on.
VDDIN_PWR_BAD_N
should stay active (low) until both
SYS_VIN_HV/MV
are valid (and not
gated).
MODULE_POWER_ON
can be set active (high) once
VDDIN_PWR_BAD_N
is inactive (high).
As the module powers on, one of the last supplies is the 3.3V supply always-on supply.
CARRIER_POWER_ON
is pulled up to the powergood pin of the 3.3V supply. Once this signal is
active (high), the carrier board supplies associated with the module (1.8V, 3.3V) can power
on.
SYS_RESET_N
is driven by the PMIC on the module during power-on. It does not need to be
controlled by the carrier board. If the carrier board supplies required for powering on
require additional time, the
PERIPHERAL_RESET_N
signal can be held low. This will keep the
SoC and other boot devices in reset.