PMIC output voltages

[rfiller73]

1) Can either SYS_VDD1_3P3V or SYS_VDD2_3P3V output voltage rails from PMIC be used to power up external circuitry such as octal buffers that drive the GPIOs directly from/to OSD3358.
2) Can the components (such as 9-axis IMU) that designed–in SM-RED board that controlled by I2C or SPI buses be powered by 3.3V rails other than SYS_VDD1_3P3V (e.g. SYS_VDD2_3P3V or SYS_VDD3_3P3V obviously given enough current). It’s not very clear from Power app note.
Schematic for OSD3358-SM-RED shows that only SYS_VDD1_3P3V rail powering up external components.

Thank you for your assistance.
Roman

[Neeraj Dantu]

rfiller73,

1) Yes, SYS_VDD2_3P3V and SYS_VDD3_3P3V can be used to power external circuitry. However, you will have to make sure to keep the current consumption on these rails under the maximum current limits in Table 8.2 of the datasheet(https://octavosystems.com/docs/osd335x-sm-datasheet/)

2) As mentioned above, the components can be powered using SYS_VDD2_3P3V and SYS_VDD3_3P3V as far as the total current on the power rails are less than the maximum output current specified in the above referenced table.

Best,

Neeraj

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