On my tinyG U7 is an LM2594 switching voltage regulator
Matches the schematic pinout, it converts Vmot to 3.3V, set by voltage divider R4 and R5.
What is a P1?
You Mean D1? schematic says it is a MBRS140, Shottky Barrier diode
If, as I am guessing, you think you killed this regulator and the diode,
there is a likelihood that the 3.3V bus on the whole tinyG went outside the range 0-3.3V.
That usually means instant death for 3.3V logic, or worse, electrical stress that may result in random near-future death.
Keep that in mind if you set off to repair