Can 3.3V be obtained from 3.7V with LM1117?

[merymery]

When I look at the LM1117 Datasheet, it says 4.75V<Vin<10V is required to get 3.3V. My circuit supply is 3.7V, is there a way to get 3.3V from 3.7V with the LM1117?

[wraper]

Do you really have 3.7V or it's a lithium battery?

[tszaboo]

The typical dropout voltage is 1.1V at 100mA. Its just not a good choice for battery powered circuits.

[merymery]

I actually have the 3.7V supply from the power supply

[xavier60]

It can be done with a TL431 controlling an N-ch MOSFET. A pullup resistor is needed for the Gate to some higher voltage source like 12V.

[tunk]

I guess it depends on how accurate the 3.3V needs to be - maybe you could find a diode (or diodes) with a ~0.4V drop.

[Zero999]

A zener diode will drop around 400mV, but it will depend on the temperature and low. At very low currents, it will hardly drop and voltage and a much higher currents it'll drop move than 400mV.

What's the acceptable voltage range of the device you're powering and how much current does it draw?

The TPS784 will work with 3.7V in and 3.3V out, at currents of up to 300mA.
https://www.ti.com/product/TPS784