npm1300 Buck1 disable without using vset1

[Ferhat Bayir]

We have a custom board with npm1300 seem below.  Im loosing 3mA more than expected. 
I used npm1300 both Vout1 and Vout2 before in other project. Same design and copmonents except using one output. Its a bga package.

I tried disable Buck1 from software but not sure achieced. Still sinking 3mA. 
I powered 3.0V externaly and board worked with 500uA consumption.

Do i have to connect Vset1 to ground or is there any alternative way. 

[Ferhat Bayir]

I tried disable but get "Buck1 Enable" in terminal

    if (!device_is_ready(buck1)) {

    printk("BUCK1 init error\n");

    }

   

    if (regulator_is_enabled(buck1))

    printf("Buck1 Control ok\n");

    regulator_disable(buck1);

    if (regulator_is_enabled(buck1))

        printf("Buck1 Enable\n");

    else    

        printf("Buck1 Disable\n");

[Ferhat Bayir]

This is my overlay. 

[Priyanka]

Hi,

You schematics look a bit different from our reference design. I will just verify this internally and get back to you.

-Priyanka

[Ferhat Bayir]

any news

[Tomi Koskela]

Hello Ferhat,

Few comments about the schematic: 

- VSET1 should be connected to GND to avoid buck1 trying to start on power up

- VOUT1 should be connected to PVDD/VSYS to avoid leakage in the buck1 biasing

- PVSS1 should be connected to GND

- LSINx/LSOUTx should be connected to GND if not used

You can take a look at reference design configuration 2 for example