MP2723 stuck after i2c read

DC-DC Power Converters
1

Hi, I developed a custom board with MP2723-AGQC-0000-P and I am able with my uC to read and write via the i2c interface.

The SDA and SCL lines have 4.5K pullups.

Randomly the MP2723 seems to go into a mode where it continually reboots, and as I can see this is caused by the read command. If I exclude reading by performing only write commands, no problem arises. When the problem occurs, the only way to restore normal functionality is to reset the device or the POR.

The problem seems to appear randomly after some time after turning it on.

Has anyone experienced similar behavior? Do you have any suggestions or is this a known issue?

Thank you
Dario

2

Hi Dario,
This is interesting for stuck after read,
have you identified which gets stuck? is it the clock line or data?

Best,
Nouman

3

Hi Nouman,

when in stuck, the SDA signal goes down while SCL is at normal high level. Please consider that the MP continous reboot cause a continous reboot also of the uC.

Thanks
Dario