We are considering TPS7A52 as LDO for GSM module that requiers typ 3.8V and is 3.3V min. Max current pulse will be 2A.
I have two concerns:
1) Shutdown current: as this is battery powered 25µA in "GND pin current" max seems really bad for us and I don't really understand what is behind this figure, especially looking at Figure16. Is it just a typical vs worst case value explanation ?
2) Behavior when Vin < (V_OUT + VDO)? During high current pulse and low temperature condition, I guess my battery voltage could go below maybe 3.6V. If the LDO was set to Vout=3.7V what would happent then? Undefined behavior? I just need Vout>3.3V in this case.
Thank you for help,