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

[tamotsu]

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.

[JorgeCas · Accepted solution]

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.

[tamotsu]

I understood it well. Thanks to your help,

I was able to solve the problem.