Power supply architecture
The ConnectCore for i.MX6 provides a primary 5V power supply input. This supply is the main power domain to the on-module Dialog DA9063 power management IC (PMIC), which generates all required supply voltages for the module components as well as the carrier board.
The module provides support for a backup battery (coin-cell or super cap) powering the real-time clock (RTC) on the module. In addition, rechargeable backup batteries (ML414, others) are also supported.
The PMIC generates the following power domains that are available on the module pads:
3.3V (GEN_3V3)
|
Power domain |
Regulator type |
Output accuracy |
Maximum current |
Dropout voltage (MAX) |
Turn on time (MAX) |
Turn off time (MAX) |
Quiescent current in OFF mode (TYP) |
|
3.3V |
DC/DC |
+/-3% |
1500mA |
- |
1µA |
1.2ms |
- |
Note The maximum current consumption mentioned in the previous table is a combination of the current consumed by the module (max 500mA) and by the carrier board for external use (1000mA).
Moreover, 5x PMIC LDO outputs are also available on the module pads:
- VLDO3
- VLDO4
- VLDO6
- VLDO7
- VLDO8
The table below provides the characteristics of the optional LDO outputs:
|
Primary 5V power supply input |
Input voltage |
Output voltage |
Output accuracy |
Default voltage |
Maximum current |
Drop output voltage (MAX) |
Quiescent current in OFF mode (TYP) |
Turn on time (MAX) |
Turn off time (MAX) |
|
VLDO3 |
+5VDC |
0.9-3.44V |
+/-3% |
3.3V |
200mA |
150mV |
1µA |
300µs |
1ms |
|
VLDO4 |
+5VDC |
0.9-3.44V |
+/-3% |
3.3V |
200mA |
150mV |
1µA |
300µs |
1ms |
|
VLDO6 |
+5VDC |
0.9-3.6V |
+/-3% |
3.3V |
200mA |
150mV |
1µA |
200µs |
1ms |
|
VLDO7 |
+5VDC |
0.9-3.6V |
+/-3% |
1.8V |
200mA |
150mV |
1µA |
300µs |
1ms |
|
VLDO8 |
+5VDC |
0.9-3.6V |
+/-3% |
3.3V |
200mA |
150mV |
1µA |
300µs |
1ms |
Note For information about using the LDO options, please contact Digi.
VLDO3 is used for supplying MCA processor on the module.
The power management IC located on the module is responsible for generating all required i.MX6 processor supply voltages. The following i.MX6x supplies are available on the module pads:
- NVCC_ENET
- NVCC_EIM
- NVCC_LCD
- NVCC_CSI
- NVCC_RGMII
Some of the I/O supplies are set on the module. See the following table:
|
Power domain
|
Connection
|
|
NVCC_GPIO |
GEN_3V3 |
|
NVCC_JTAG |
GEN_3V3 |
|
NVCC_NANDF |
GEN_3V3 |
|
NVCC_SD1 |
GEN_3V3 |
|
NVCC_SD2 |
GEN_3V3 |
|
NVCC_SD3 |
GEN_3V3 |
|
PCIE_VPH |
2.5V (VDDHIGH_CAP_2V5) |
|
NVCC_EIM |
|
|
NVCC_LCD |
|
|
NVCC_CSI |
|
The remaining I/O voltages must be set externally and are left open on the ConnectCore for i.MX6 module. See the following table for operating ranges of the remaining I/O supplies.
|
Power domain |
Min |
Type |
Max |
|
NVCC_ENET |
1.65V |
1.8V |
3.6V |
|
NVCC_EIM |
1.65V |
2.8V |
3.6V |
|
NVCC_LCD |
1.65V |
3.3V |
3.6V |
|
NVCC_CSI |
1.65V |
- |
3.6V |
|
NVCC_RGMII in HSIC 1.2V mode |
1.15V |
- |
1.30V |
|
NVCC_RGMII in RGMII 1.5V mode |
1.43V |
- |
1.58V |
|
NVCC_ 1.8V mode |
1.70V |
- |
1.90V |
|
NVCC_RGMII in RGMII 2.5V mode |
2.25V |
- |
2.625V |
As shown in the table above, the supplies have a wide operating range. In order to provide the most cost-effective and flexible solution for a given use-case, the supplies listed in the table need to be provided by the carrier board integrating the ConnectCore for i.MX6 module. However, PMIC power domains 3.3V - and LDO3/4/6/7/8 options - are dedicated power sources for supplying i.MX6 power domains.
The MCU - assist specific power domain (LDO3_MCA) available on the ConnectCore for i.MX6 LGA pads is a power supply output powering the on-module Kinetis processor.
The following diagram outlines the power supply approach of the ConnectCore for i.MX6. Inputs are marked red, blue marks are outputs.
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