Other Parts Discussed in Thread: TPS3803G15-Q1
Hello,
My goal in using the TPS3805H33-Q1 is to enable a 1.8V supply only after the both the main 3.3V and 2.8V supply have reached their appropriate levels.
I have selected it instead of the -01-Q1 because of the push-pull output, eliminating the need for a pull-up resistor. The threshold voltage I have selected is ~2.68V.
The schematic screenshot is attached here.
The Altium library does not currently have the TPS3805H33-Q1 available, so I have followed the pin out from the datasheet but used the symbol for the TPS3803G15-Q1.
My second request is about the datasheet layout recommendations, specifically figure 24 from the datasheet. If VDD (3.3V here) is different from the voltage to be sensed (2.8V here), how critical is Cvdd and how critical is the C? Note the device will likely be sitting directly underneath the 3.3V supply, which is the system supply. This will be for a very small camera module, 2cm x 2cm PCB size, and backside has even tighter constraints to fit inside a lens housing.
Thanks,
Luis Cordova
