What is LM1117?
The LM1117 is a low dropout voltage regulator with a dropout of 1.2 V at 800 mA of load current. The LM1117 is available in an adjustable version, which can set the output voltage from 1.25 to 13.8 V with only two external resistors. In addition, it is available in five fixed voltages, 1.8 V, 2.5 V, 3.3 V, and 5 V.
How do I adjust my LM1117?
To set up, attach one capacitor from the output pin of the LM1117 to the ground pin of the LM1117. Next, do the same going from the input pin to the ground pin. These capacitors are polarized. Ensure the positive leg of the capacitor is in the input/output and the negative leg is connected to ground.
What is the relationship between the voltages of the output and adjust pins of the LM1117 when in normal operation?
The LM1117 adjustable version develops a 1.25V reference voltage, VREF, between the output and the adjust terminal.
Does voltage regulator reduce current?
No. The regulator will try to keep the output voltage constant at 3.5V, but the output current depends on the load.
What is LM117?
LM117 is a voltage regulator. It is able to regulate the voltages at the output ranging between 12.5 to 37V and provides the 1.5A ofoutput current. By connecting the two external resistors, it provides the desired output, so it is very easy to use it.
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