Chose step up or?

Hi,
Im making some esp32 project with ws2812b LED,the ws2812b LED need 5v suplly and esp32 need 3v3 supply,im using a single 3,7v battery for both for esp32 im using lm1117 regulator for 3v3 and for the LED i step up from the battery to 5,3v.
But i don't know that is the best way to do it,could you guys share knowledge or experience to us,what the best thing to do here if we want battery live longer should i use step up?or should i use a higher voltage battery?

Thankyou in advance

The voltage regulator will not be able to produce 3v3 from 3.7. Especially if the battery is getting empty.

Best can mean different things at different times.

I've always had better luck with step-down regukation, so often use two lipo cells or a 2s battery.

But that may make charging or taking other care of the battery harder. So what?

It may take more room or weigh more.I didn't care.

And so forth. By what criteria do you want to have the best way?

Like what color to paint the box… your solution works, except that 5.3 volt thing, why not 5.0 like the specs want?

a7

Good point. It is billed as low dropout at 1.2 volts, which doesn't seem that low to me, but hey.

Even full at 4,2 volts, you would still be asking for too much.

There are step-down/step-up regulators that could supply 3.3 volts until you'd gone way too far on discharging the cell.

In all cases, please take care and don't discharge below a certain voltage.

Go here and learn all about why you shoukd learn all about LiPo chemistry cells!


a7

I think using a linear regulator for the ESP32 is fine, but you need the right regulator. The HT7333 regulator has a typical dropout voltage of 60mV at 40mA current. The dropout would increase somewhat with current, but it's still a completely different world from the 1117 types. Another good one is the MCP1700. I'm not sure either of them has enough current for a transmitting ESP32, but other very low dropout regulators with higher current are available.

And then for the 5V supply, an MT3608 boost module should work well.

That would let you stick with simple 1S charging. Unless protection is built into your charger, you would want to use protected batteries.

I use this 3.3V 0.5A stepdown regulator with a 3.7V 18650 battery to power ESP32 WiFi projects, and have not had any problems.

Is that because it always delivers 3v3 or because esp will also run on 2v8?

Im trying use 2s battery,and for the charger im using IC SY6982E with input from USB 5v

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