3.3v output of nano vs uno

Hello guys
i wanna supply esp8266 with 3.3v output of nano. I have checked the datasheet of ft232rl which is used in nano as a usb to serial converter. Also ft232rl is a 3.3v source of arduino nano. And maximum output current of ft232rl is 50mA. And when i measure the current which is going through on Esp8266 is 115mA in my circuit and i am supplying with arduino uno. Datasheet of arduino uno states that maximum 3.3v output current of uno is 50mA but i have looked the schematic diagram of uno and i am not sure but i think LP2985-33DBVR is regulating the voltage. And 3.3v output current of lp2985 is 150mA in recommended operating conditions. So i think that's why i am able to supply my esp8266 i think. But i really like to use arduino nano so what would be a solution for me ? Using external regulator ?

Use an external 3.3V regulator like the AP1117-3.3

esp8266 current can be as much ad 350 mA.

The output current of AP117-3.3 is 10mA. I need 115 mA.

wow 350mA is not a small amount of current. How people supply this ?

What do you expect for WiFi/microcontroller? WiFi is a spread-spectrum ultra-high bandwidth comms
system that shares spectrum with microwave ovens, and there's a microcontroller as well, all off 3.3V

Normally for 350mA you'd have a supply capable of at least 350mA, what's the big deal? Mobile
phones use a lot more.

I mean of course it is not that much but i really dont know how to supply for my circuit i need some help !!

caneradiyaman6:
Datasheet of arduino uno states that maximum 3.3v output current of uno is 50mA but i have looked the schematic diagram of uno and i am not sure but i think LP2985-33DBVR is regulating the voltage. And 3.3v output current of lp2985 is 150mA in recommended operating conditions.

Correct. Many things on this site are wrong, and nobody seems to be able to correct them.

caneradiyaman6:
The output current of AP117-3.3 is 10mA. I need 115 mA.

A 3.3volt 1117 with 5volt input should be able to supply 500mA, even on a small board.

caneradiyaman6:
I mean of course it is not that much but i really dont know how to supply for my circuit i need some help !!

External 3.3volt 1117. e.g. this one.
http://www.ebay.com/itm/5-pcs-Double-Side-Board-Design-AMS1117-3-3V-power-Regulator-Sensor-Module-/251631814414?hash=item3a966cc70e:g:w0MAAOSwxH1UAYtP
Or switching, if input voltage is >5volt.
http://www.ebay.com/itm/10pcs-Mini-360-DC-DC-4-75V-23V-to-1V-17V-Buck-Converter-Step-Down-Power-supply-/191773734744?hash=item2ca69af758:g:9McAAOSwJkJWiMJ9
Leo..

i dont want to use modules. Is there anyone who know a good regulator and it's circuit ? i have found ams1117-3.3 but i couldnt find it digikey or mouser so i dont wanna use it.

An SMD TO-223 3.3volt 1117 (there are also other packages/voltages) needs input and output caps to ground for stability. So it is wise to buy a board with those caps already mounted on it.
The board also provides some cooling. Without it it will get 90C hotter than ambient per watt dissipated.

Found this after some Googling.

Wouldn't use it because it lacks decoupling caps, but there might be similar adapters with caps.
Leo..

i am using this circuit and this regulator. What do you think about that guys.

Yes. Essentially the same as a 3.3volt AMS11117.
Leo..

1117 3.3V output regulators are plentiful at digikey
http://www.digikey.com/product-search/en/integrated-circuits-ics/pmic-voltage-regulators-linear/2556290?k=1117&k=&pkeyword=1117&pv48=22&FV=fff40027%2Cfff80182&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25

The approach I took here was to convert the Nano to 3.3 volts. The raw ESP8266 pins are not 5 volt tolerant, although some breakout boards have level shifters.