STM32MP153F datasheet(30/38 Pages) ETC

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OSD32MP15x Datasheet

Rev. 7 11/30/2022

Octavo Systems LLC

7.5 Power Output

The OSD32MP15x produces the following output power supplies that can be used for general

system power. Each of the output voltages can be programed by the STM32MP15x processor

via the I2C bus. Each of the power supplies has a default output voltage and rank as specified

in the STPMIC1A column of Table 1 of the STPMIC1 datasheet. The non-volatile memory

(NVM) of the PMIC can be set to change the default output voltage and rank of the power

supplies. By default, the final power configuration is set in the Device Tree during boot.

When changing the output voltage of any of the power outputs listed below, all power

dependencies must be comprehended, and each power input must have enough input voltage

and input current. For example, the power input for PMIC_LDO1 and PMIC_LDO6 is internally

connected to PMIC_VOUT4 power output. Each of the LDOs has a maximum dropout voltage

of 300mV. Therefore, to set either of the LDOs to 3.3V, PMIC_VOUT4 must also be set to 3.6V.

Please refer to the Power Block Diagram to understand which power inputs and outputs are

connected within the OSD32MP15x.

Please refer to the datasheet for the STPMIC1A and the STMP32MP15x in the Reference

Documents section for more information.

7.5.1 PMIC_VOUT4

PMIC_VOUT4 is produced by Buck4 of the STPMIC1A. The input of Buck4 is tied to the VIN

pin of the OSD32MP15x. By default, it is configured to operate at 3.3V and will start

automatically 10ms after a “Turn_ON” condition. It can be programmed to have a voltage

output from 0.6V to 3.9V.

7.5.2 PMIC_LDO1

PMIC_LDO1 is produced by LDO1 of the STPMIC1A. The input of LDO1 is tied to

PMIC_VOUT4 (Buck4 Output) internal to the OSD32MP15x. By default, LDO1 is configured to

operate at 1.8V and will not start automatically. It can be programmed to have a voltage output

from 1.7V to 3.3V.

Note that PMIC_LDO1 and PMIC_LDO6 are powered by PMIC_VOUT4. The total load on

these LDOs plus any external load on PMIC_VOUT4 must not exceed the capabilities of the

Buck4 regulator outlined in Section 8.

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