Ams1117 3.3v alternative

Projects General Guidance
1

I'm powering my nRF24L01+ with an ams1117 3.3v, which is being powered with 8.4v. But it gets very hot, sometimes you can't even touch it. That's why I need an alternative, something that can supply more current. But I don't know what I can use instead of the ams.

Also this is the third ams I'm using, It's not a short circuit because I already rebuilt the entire nRF power system 3 times

2

Datasheets will tell "how to".

3

Doesn't draw much current.
Input voltage is little bit on high side, but should't get extremely hot

4

Are you only supplying voltage to the 24L01?
nRF24L01 datasheet.

nRF24L01 consumption +- 12mA.
Voltage drop across the ams1117 regulator = 8.4 - 3.3 = 5.1
Power dissipation across the ams1117 = 5.1 * 0,012 =~ 60 mW.
With this dissipation it should not heat up.

5

Yes, I'm using a separate ams only for the nRF.

6

There has to be something wrong on your circuit.
Feel free to post it here..

7

Without schematics, it's a guessing game as to what the problem is.

You do have the recommended input and output capacitors to keep the regulator from going into oscillation, right?

You have measured the current flowing through the regulator to see that it's not out of whack, right?

8

I'm using a module like this one
https://pt.aliexpress.com/item/1005002790005455.html?src=google&pdp_npi=4%40dis!BRL!0.48!0.42!!!!!%40!12000022196339237!ppc!!!&src=google&albch=shopping&acnt=768-202-3196&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=pt1005002790005455&ds_e_product_merchant_id=438335467&ds_e_product_country=BR&ds_e_product_language=pt&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=21106536414&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=CjwKCAjw-qi_BhBxEiwAkxvbkOwHUOnAm3Tnh-nU0hNkQ5ANFZIjVIDXcxzAoX1NzGF7Xjn4xY8zGBoCYygQAvD_BwE

my multimeter ran out of battery, going to buy a new one later

The module part is literally 8.4v -> module -> nRF

9

An AliExpress module? Are you familiar with the expression "you get what you paid for - if you're lucky?"

Don't want to go to the effort of showing a schematic? That's fine. I'm done here then. Good luck with your project.

10

It's because I don't have a schematic, I'm making an ESP32 nRF24 remote controller for my rc truck, and when I started this project I wasn't planning to show other people "inside" my controller. Also before the module I was using only the AMS and capacitors on the input and output of the module, but the AMS got hot just like now. With the new battery in my multimeter I hope to find the problem. Thanks for your time!

11

What does NRF24 offer you that just Esp32 already doesn't ?

12

It's a multi-purpose controller. I'm planning to make a rc plane in the future, and the nRF signal can go really far.

13

Ahh, ok.
Post your circuit, even hand drawn plus good photos can be fine...

14

9c!! Run 2 or 3 of them in parallel :wink:

bild
bild960×1502 150 KB

Greetings from Aliexpress! (Source, link OP provided)

you are not'll find ......... power supply and tangled
expand the number of interfaces and distress
some of the electrons can be designed to facilitate the expansion of power

15

If you don't connect any load to the 1117 module, does it get hot?

16

It doesn't

Also I removed the module and now I'm using the ams1117 alone. Still gets hot

Measured it, before and after the AMS the current is .30mA, sometimes .35mA

17

Still believe your regulator is good to go? Stop buying crap. It was cheap to buy, and expensive to use unless you value your (and our!) time zero.

8.4 * 0.00035 = 0,00294 W - Not even an ant would get burned, what are you talking about?

18

I think I found the problem.
I removed everything from the nRF, and with the multimeter I discovered that the nRF's VCC and GND is shorted. Gonna buy a new one