I’m doing a PCB project using a Teensy 3.5 and a 6V voltage source. Can I power the xBee through the SparkFun XBee Explorer Regulated breakout board directly with 6V or must I use the Teensy 3.5 3.3V output pin? Is 3.3V enough to power this board considering there is a regulator? I know the description says 5V input (down to 3.3V), but a few colleagues of mine tried using the 3.3V output pin of the Teensy and had problems with doing so.
The [datasheet for the regulator says the input voltage up to 12 VDC is ok so I’d be comfortable using 6.](https://ww1.microchip.com/downloads/en/DeviceDoc/MIC5219-500mA-Peak-Output-LDO-Regulator-DS20006021A.pdf)
The schematic for the Regulated Xbee Explorer carrier boards shows that the voltage regulator used is a AP63203. The schematic has a note in the Buck Converter section that indicates 'VIN - 3.8v - 5.5V. The data sheet for the AP63203 lists the Vin voltage range max at 35 volts (DC). The schematic shows a direct connection from the VIN pin to the AP63203 Vin pin with a 10K connection to EN. The AP63203 shows that EN also list a max voltage of 35V. I want to run my carrier board directly from a 12V battery. Is the voltage range listed on the schematic shown as a ‘recommended’ input range or is there another reason to not use the AP63203 datasheet range?