AMS1117 why is the voltage sagging?

Question

Electronics

Greetings,
I have ams1117 connected to the power supply (5v, 2A), and esp8266 is already connected to it, nothing else. But when the ESP8266 is turned on, the voltage on the chip sits up to 2.8 - 3.0v. Because of this, the whole structure begins to work rather unstable.
Can I do something so that the voltage does not sag, or maybe I need to take something else instead of ams1117, preferably something small?

Answer 1

ams1117 should be enough for esp8266.
Definitely not enough capacitor
Try repeattyts

Answer 2

want something small?

for example, Rosenthal's handbook. and Google
Ohm's law remember / find out, and everything will fall into place. load resistance is a variable value (especially at the moment of start), the current strength is limited by the capabilities of your power supply, the voltage simply has nowhere to go, except to sag.
Put the electrolyte in parallel with the power supply, or better - a stub.

Answer 3

I attached two capacitors (electrolyte) in parallel between the ground and 3.3 / 5v at 100 nF, there is no effect.