The LD1117 is a low dropout, 3-terminal positive voltage regulator designed to provide output current up to 1A in a TO-220 package.
Features include
Low dropout voltage
Output current up to 1.0A
Built-in current limit and over temperature protection
Low current consumption
Uses of LM1117 IC?
Just like the famous 7805 and LM317, the LM1117 is another Linear Voltage regulator. It is known for its small form factor since it is available as a DCY Package (SMD Component). There are many types of LM1117, the fixed types provide a fixed output voltage of 1.8V, 2.5V, 3.3V or 5V and the variable voltage regulator can have a variable voltage from 1.25V to 13.8V.
Pin Configuration
Pin Number
Pin Name
Description
1
Adjust/Ground
This pins adjusts the output voltage, if it is a fixed voltage regulator it acts as ground
2
Output Voltage (Vout)
The regulated output voltage set by the adjust pin can be obtained from this pin
3
Input Voltage (Vin)
The input voltage which has to be regulated is given to this pin
Applications:
Used for Positive voltage regulations
Variable power supply
Current limiting circuits
Reverse polarity circuits
Commonly used in Desktop PC, DVD and other consumer products
Used in motor control circuits
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