npm1300 Buck1 disable without using vset1

RE: npm1300 Buck1 disable without using vset1

Tomi Koskela — Fri, 12 Sep 2025 05:47:11 GMT

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

RE: npm1300 Buck1 disable without using vset1

Ferhat Bayir — Thu, 11 Sep 2025 10:19:33 GMT

any news

RE: npm1300 Buck1 disable without using vset1

Priyanka — Wed, 10 Sep 2025 10:35:25 GMT

Hi,

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

-Priyanka

RE: npm1300 Buck1 disable without using vset1

Ferhat Bayir — Tue, 09 Sep 2025 13:12:03 GMT

This is my overlay.

RE: npm1300 Buck1 disable without using vset1

Ferhat Bayir — Tue, 09 Sep 2025 13:08:41 GMT

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");