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Original question:

TPS6593-Q1: TPS6593-Q1 reboots AM62A3 during wakeup.

TPS6593-Q1: Output of VOUT_LDO1 is 0V is sleep mode, how to change it to 3.3V at sleep also.

Abhineet Ranjan
Intellectual 635 points
Part Number: TPS6593-Q1
Other Parts Discussed in Thread: AM62A3

Tool/software:

Hello Teams 
In sleep mode of AM62A3, output of  VOUT_LDO1 is 0 Volt. my custom board required it output to be high.
What are the chenges need to be done to keep output of  VOUT_LDO1 as 3.3V.

Please find the attached schematic.


3362.TPS65931211RWERQ1.pdf

Best regars
Abhineet Ranjan

  • +1
    TI__Mastermind 20399 points

    Hello Abhineet,

    Going to sleep LDO1 will turn off, there's no way to edit the power sequence without editing the firmware, but if you have another I2C controller device you can turn on LDO1 by writing to the LDO1_CTRL.

    You want to write LDO1_VMON_EN & LDO1_EN to 0x1 on the same write. Note this is outside the use of this PMIC & the AM62A, please consult with that team in regards to how having VDDSHV_SDIO powered for extended periods of time with other rails turned off.

    BR,

    Nicholas McNamara