topic Re: The VSNVS voltage of the PF3000 remains at 1.159V even though VIN is set to 4.0V. in i.MX Processors

The VSNVS voltage of the PF3000 remains at 1.159V even though VIN is set to 4.0V.

tamotsu — Mon, 09 Jun 2025 08:00:35 GMT

HI.

The VSNVS voltage of the PF3000 remains at 1.159V even though VIN is set to 4.0V.

I thought that if I set VIN to 4.0V, it would unconditionally become 3.0V. Is there some setting?

Thank you.

Re: The VSNVS voltage of the PF3000 remains at 1.159V even though VIN is set to 4.0V.

JorgeCas — Mon, 09 Jun 2025 17:35:11 GMT

Hello,

According to datasheet, when the coin cell is applied for the very first time, VSNVS outputs 1.0 V. Only when VIN is applied thereafter does VSNVS transition to its default value. Upon subsequent removal of VIN, with the coin cell attached, VSNVS changes configuration from an LDO to a switch, provided certain conditions are met as described in Table 67.

Best regards.

Re: The VSNVS voltage of the PF3000 remains at 1.159V even though VIN is set to 4.0V.

tamotsu — Tue, 10 Jun 2025 00:51:53 GMT

I understood it well. Thanks to your help,

I was able to solve the problem.