Ok here s the thing.
Embedded 5v to 3 3 v voltage regulator.
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A fully integrated 5 v to 3 3 v supply voltage regulator for application in digital ic s has been designed in a 3 3 v 0 5 spl mu m cmos process.
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If you prefer a ready made module instead take a look at ams1117 3 3v modules on ebay.
For example a tc1262 from microchip has a drop out voltage of about 300mv at a normal current consumption of the esp8266.
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N2 a fully integrated 5 v to 3 3 v supply voltage regulator for application in digital ic s has been designed in a 3 3 v 0 5 μm cmos process.
3 5 v ldo voltage regulators are available at mouser electronics.
The regulator is able to deliver peak current transients of 300 ma while the output voltage remains within a margin of 10 around the nominal value.
Ldo voltage regulators 200ma ldo vout 3 5v dropout 130v iq 170ua psrr 70db in sot 353f ufv package.
You can certain create a voltage divider.
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Mouser offers inventory pricing datasheets for 3 5 v ldo voltage regulators.
The problem is what do you do with that 3 3v output.
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You should look for a low drop out linear regulator which will regulate the battery voltage to 3 3v.
Mouser offers inventory pricing datasheets for texas instruments to 3 linear voltage regulators.
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T1 embedded 5v to 3 3v voltage regulator for supplying digital ics in 3 3v cmos technology.
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99 get it as soon as fri oct 2.
This board is best to use in a project that is designed tobe powered with a 9v dc from either a pp3 battery or a wall adapter.
For the safety of the ams1117 3 3 regulator ic the unregulated input voltage is also recommended to be within 6 5 to 10 0 v.