ESP8266 Community Forum

- Fri Oct 28, 2016 9:32 am #57284 Hello,
For my project i chose to use TC1262 voltage regulator due to its very low power consumption .
I am trying to run simple blinking LED project which works great if I use AMS1117 regulator .
But if I change to TC1262 its doesn't works .

The voltage on the esp 2V current 200mA, when the CH-PD IO is disconnected the voltage on the esp is 3.3V.
I cant find the reason why it happens and what more should I check.
Here is my connections , please help me to find out the problem :



Thanks !

- Fri Oct 28, 2016 10:39 am #57286 You could try to increase C2 to 100uF.
But it is very strange that you get 2V output at 200mA, because the TC1262 specs mentioned a Vdropout of around 390mV at this current. Maybe the TC1262 is defective. Check with a resistive load without ESP connected, if you get the same 2V, for sure it is defective.

- Fri Oct 28, 2016 11:33 am #57287 What kind of batteries are you using? What is the voltage at the input of the regulator?

- Fri Oct 28, 2016 1:08 pm #57291

You could try to increase C2 to 100uF.
But it is very strange that you get 2V output at 200mA, because the TC1262 specs mentioned a Vdropout of around 390mV at this current. Maybe the TC1262 is defective. Check with a resistive load without ESP connected, if you get the same 2V, for sure it is defective.

Hi , it happens only when i connect the CH-PD enable pin , I wrote that w/o this pin the voltage is 3.3v.
Can you please explain why 100uF should help ? I understand why need capacitors with regulators
But I don't understand how the size of capacitors chosen ? why 100uF why 10uF is bad ?

What kind of batteries are you using? What is the voltage at the input of the regulator?

Hi alkaline 3 x AA 1.5V LR6, the input voltage is 3.7V w/o CH-PD Enabled / 3.5V with , I have also try'd with 4 batteries same result .