LD1117v33 to get 3.3v
The 120 ohm resistor is only required for the 1.2V version of the LD1117 to maintain minimum regulation, with a 10 mA minimum load. It's unneeded for the 3.3V version.



That said, 3.27V is within the specs for the 3.3V version. See the VO spec on the datasheet, for the 3.3V version. The datasheet has a spec section for multiple output voltages.



That said, a 120 ohm resistor is only a 27 mA load at 3.3V. Try a larger load like 250mA and check to see if the voltage is still within range. Make sure your capacitors are as close to the LDO as possible. You may need a larger input capacitor depending on how far away your power supply is. If it's not within range at a higher load up to 800 mA it may be bad. And this is for the ST branded LD1117, other brands may have different requirements or specs.