KL30T: 6V-16V (ISO7637-2 protected).
KL30T Quiescent Current Requirements: < 100uA.
I am having a Power Moding issue with Internal PD 1MOhm on DIS/EN^ pin as the PD means the TPS40210-Q1 will turn on by default when SW PFET is turned on.
However, as soon as SW PFET is on, the Power Supply will take some time to stabilize and MicroP will take some time to initialize (typically in miliseconds).
This means the PD in TPS40210-Q1 will enable the TPS40210-Q1 for a short duration (miliseconds) time.
The SW PFET is used to meet the Quiescent Current requirement stated above and the Schottky Diode are used as Reverse Battery Protection (RBP).
Therefore, I am adding some discrete control circuitries as below (PU resistors, BJT NPN and Zener diode) to ensure TPS40210-Q1 remain OFF till the MicroP is ready, then TPS40210-Q1 can be commanded to turn on through the Base of the NPN transistors. The Zener Diodes are used to clamp the DIS pin voltage to below 10V max rating.
Please help to review the discrete control circuitries below. Thanks in advance.