Max input voltage of PSWITCH and DCDC_CFG pins on MKW40

[#1]

Our customer, who is considering MKW40, is asking NXP regarding max input voltage of PSWITCH and DCDC_CFG pins.

Especially they plan to use buck mode with input voltage 4.2[v] as shown below.

Would you comment if max voltage of PSWITCH and DCDC_CFG pins is 4.2[v] as well as DCDC_IN pin?

Regards,

Koichi

[mihaidragnea]

Hi Koichi,

The above configuration shall work without any problem. According to chip reference manual, chapter DCDC, in buck configuration mode, DCDC_IN voltage is between 1.8V and 4.2V, the DCDC_CFG is tied to DCDC_IN and PSWITCH will also be tied to DCDC_IN each time the pushbutton is pressed. Please see the below picture from reference manual.

Regards,

Mihai

[koichimatsuo]

Hello Andrei,

Thank you for your comment.

According to your comment, do you plan to update MKW40 datasheet?

Because our customer want NXP's guarantee with MKW40 datasheet.

Regards,

Koichi