ESP8266 Community Forum

- Sat Oct 17, 2015 5:32 am #31581 Have you seen this?

https://www.adafruit.com/products/2745

This 3.3V Buck Converter Breakout board is great for supplying power to low voltage circuits from a single Li-Ion cell battery or USB power. This chip provides up to 600-mA load current across the entire input voltage range of 3.5 to 5.5V.

- Sat Oct 17, 2015 8:59 am #31591 Using that Lipo charger board and placing an ams 1117-3 behind it wil not work. The 1117 needs an input voltage of min. output voltage + 1.5V.
As the max voltage is 4.25V on the board this is lower then the needed 4.8V.
You need to place two lipo's in series.
But the charger boards cannot be linked.

- Sat Oct 17, 2015 12:50 pm #31602 TPS63050 looks like an answer to this problem.
Anyone used them?

LD39080DT33 also looks interesting.

- Sat Oct 17, 2015 3:27 pm #31612 Tested OK with TPS63060 on his adjustable step up/step down regulator
https://www.pololu.com/product/2118/resources

Ok with input voltage down to 2.8V,
ESP-01 sending datas to TingSpeak every minute (no deep-sleep).
Not yet tested with ESP-12 awake from deep-sleep