MPS3695GPJ-20-2222 output voltage regulation in idle

Integrated Inductor Power Modules
1

Dear support team,

I use the MPS3695GPJ-20-2222 module to generate 5V. Resistor voltage divider is defined according the recommendation from datasheet. At no-load after power-up, the voltage starts at 5.2V, regulates up to 5.8V, and then shuts down. An over-current error is recorded in the error log. If the module is immediately loaded with a 3A load, the 5V voltage remains stable, and I can increase the load up to 20A. However, as soon as I reduce the load below 3A, regulation errors occur. The voltage regulates down and up until the module shuts down. The settings over PMBus are not changed and still defaults (Vout 1,8V Vscale 0,335).

Best Regards

Richard Hoss

2

Hello Richard,

Does the issue persist when you change the Vout and Vscale to 5V and 0.12 respectively?

I would also recommend changing the switching frequency to either 800kHz or 1MHz since this on the higher voltage output end.

Let me know what happens after trying this out on the GUI.

Best,

Krishan