3.3v Batteries

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Re: 3.3v Batteries

By Hukuma
- Tue May 05, 2015 5:45 am #16543
trackerj wrote:I prefer to have a onboard 3.3V regulator, gives you more flexibility in terms of power supply
http://www.esp8266-projects.com/2015/04/p2-esp8266-ultimate-devboard-firmware.html


Thank you for your answer. I tried to use AMS1117-3.3, but for this dropout voltage is about 1.1V. Therefore this linear regulator will be suitable for 2s li-po/li-ion and unsuitable for one 18650. Which one you use?
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Re: 3.3v Batteries

By trackerj
- Tue May 05, 2015 11:30 am #16587
Hukuma wrote:
trackerj wrote:I prefer to have a onboard 3.3V regulator, gives you more flexibility in terms of power supply
http://www.esp8266-projects.com/2015/04/p2-esp8266-ultimate-devboard-firmware.html


Thank you for your answer. I tried to use AMS1117-3.3, but for this dropout voltage is about 1.1V. Therefore this linear regulator will be suitable for 2s li-po/li-ion and unsuitable for one 18650. Which one you use?


Few of them:
- LD1117s30tr, works ok until now even if is going under 3V. Preffered solution for 5V input
- MCP1700 - good for battery setup but 250mA max, quite short on juice sometime
- MCP1825 - better than MCP1700, 500mA.
- APE8865-HF-3 - nice one, depending on your power needs, 300mA only.

The one below looks also nice in datasheet, max 250mA might be to the limit with some ESPmodules type/ setups. If you run a test with it please share the results. Thank you.
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