These LDO voltage regulators, have a very low Quiescent Current, that means they do not take much current to run themselves, about 5 microamps (not milliamps, MICRO amps) making them great for “standby” on battery operated things that might operate infrequently (like, sensors).
** REMEMBER TO TELL ME WHICH PACK YOU WANT **
The drop-out voltage is less than 100mV.
250mA Output Current of course, subject to power dissipation!, with a max input 12v
Here are applicable Holtek datasheets, the first datasheet gives a max input of 12v and the second a max input of 30v, I can't tell you which parts I have, that varies time to time, assume it's the the lower.
sparks.gogo.co.nz
www.holtek.com.tw