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regulator heating problem
Posted:
Sun Aug 02, 2015 7:35 pmby koushik k m
I started working with esp8266 , when I gave the power supply it works fine and tried some AT commands. But within few seconds my 3.3 regulator started heating,I double checked connections ,everything was fine. I used l7833 regulator. Help?
Re: regulator heating problem
Posted:
Mon Aug 03, 2015 1:52 pmby lethe
What's the input voltage of your regulator? The ESP can draw up to 300mA in bursts (when esp. transmitting). With a LDO I would not recommend more than 5-6V on the input side, otherwise the regulator will have to dissipate a lot of heat.
If you need to work with a higher input voltage, you should consider using a switching regulator.
Re: regulator heating problem
Posted:
Mon Aug 03, 2015 2:59 pmby martinayotte
Also, the 78L33 is rated for 100mA, so since ESP8266 is taking more than that, it is normal that regulator is suffering, it will maybe even die later ...
Better use something like AMS1117 rated to 1A.
Re: regulator heating problem
Posted:
Tue Aug 04, 2015 1:11 amby alonewolfx2
martinayotte wrote:Also, the 78L33 is rated for 100mA, so since ESP8266 is taking more than that, it is normal that regulator is suffering, it will maybe even die later ...
Better use something like AMS1117 rated to 1A.
right. esp8266 consumes almost sometimes 300ma peak on boot. 100ma not enough.