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?
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.
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.