LM117T 3.3V Low dropout Voltage RegulatorProduct has been kindly sponsored by taydaelectronics.com

Product specificationsGeneral
Manufacturer: National Semiconductors Type: Voltage Regulator Architecture: For all electronics Package/Case: TO220 RoHS: Compliant Regulator Topology: Positive fixed Regulator Type: Linear Main Feature: Low Dropout, Current Limiting & Thermal Protection Ripple Regulation (if ripple frequency is 120 Hz, input/output voltage is 3 volts and ripple voltage is 1 volt peaktopeak): 60  75 dB Temperature Stability: 0.5% Long Term Stability (if ambient temperature is 125°C for 1000 hours): 0.3% RMS Output Noise (% of output voltage if the frequency is ≥ 10 Hz but ≤ 10 KHz): 0.003% Thermal Resistance (JunctiontoCase): 3°C/W Thermal Resistance (JunctiontoAmbient with no air flow): 79°C/W Thermal Regulation (if ambient temperature is 25°C with a 30ms pulse): 0.01%/W  0.1%/W Junction Temperature: 0°C  150°C Storage Temperature: 65°C  150°C Lead Temperature: 260°C for 10 seconds ESD Tolerance: 2000 volts 
Power
Maximum Input Voltage (input voltage to ground): 20 volts Power Dissipation: Internally limited Output Voltage (if junction temperature is 25°C, output current is ≥ 0 mA but ≤ 800 mA and input voltage is ≥ 4.75 volts but ≤ 10 volts): 3.235  3.365 volts Line Regulation (if output current is 0 mA and input voltage is ≥ 4.75 volts but ≤ 15 volts): 1  6 mV Load Regulation (if input voltage is 4.75 volts and output current is ≥ 0 mA but ≤ 800 mA: 1  10 mV Dropout Voltage (if output current is 100 mA): 1.10  1.20 volts Dropout Voltage (if output current is 500 mA): 1.15  1.25 volts Dropout Voltage (if output current is 800 mA): 1.20  1.30 volts Current Limit (if input/output voltage is 5 volts and junction temperature is 25°C): 800  1500 mA Quiescent Current (if input voltage is ≤ 15 volts): 5  10 mA Weight and Size Dimensions Product Weight: 2g Product Size (L x W x H): 9.7 x 4.2 x 28.5 mm Tab Dimensions (L x W x H): 9.7 x 1.0 x 6.3 mm Case Dimensions (L x W x H): 9.7 x 4.2 x 8.0 mm Lead Dimensions (L x W): 0.5 x 0.1 x 13.6 mm 
product review 
pinout 
To start off with, this simple yet efficient and powerful voltage regulator provides a whole lot of functionality to a project or circuit due to the fact that it:
1. Has a low voltage dropout (± 1 volt on different amperages). 2. Is small in regards to its physical dimensions for breadboard circuits or PCB projects. 3. Can be used with a high temperature of 150°C for projects involving high current or direct heat. 4. Has a thermal tab for an external heatsink to be mounted to the regulator, if necessary. 5. Has a fairly simple pinout (pinout to the right). 
Left leg (case facing me)  GND
Middle leg (case facing me)  Output voltage Right left (case facing me)  Input voltage Datasheet
schematics

TAYDA ELECTRONICS PRODUCT PAGE
Check out the product here: https://www.taydaelectronics.com/lm1117tlm1117lowdropoutvoltageregulatoric33v.html