# Boost with LDO?

I'm working on a project that requires 3.3V from a pair of double AAs. I had thought that LDOs were always buck and if you needed boost you had to use a switching regulator. While doing some research for this project I came across the TPS736 line of LDOs from TI and now I'm confused.

Reading the datasheet leads me to believe that I can get 3.3V from 2 AAs as they run down to the minimum input voltage of 1.7V. Am I reading that right?

• An LDO regulator may also be a buck switching regulator but usually it is a linear (non-switching) regulator. In no way, shape or form can the voltage regulator specified produce 3.3 volts from a smaller input. It is a linear regulator not a switcher. – Andy aka May 24 '15 at 14:15

(1) Minimum V$_{IN}$ = V$_{OUT}$ + V$_{DO}$ or 1.7V, whichever is greater.
So V$_{IN}$ cannot be less than V$_{OUT}$. So it is a regular LDO.