LM1117T 5V 800mA Low Dropout Voltage Regulator (TO-220)
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Prices updated: 14 Oct 2026
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About this product
A fixed 5 V low-dropout linear voltage regulator in the TO-220 package, rated for up to 800 mA output. It is used to power 5 V logic, sensors and modules from a higher DC supply. It includes current limiting and thermal shutdown, and the listing specifies a minimum 10 µF tantalum capacitor at the output for stable transient response.
Specifications
- Output voltage
- 5 V fixed
- Maximum output current
- 800 mA
- Package
- TO-220
- Dropout voltage
- 1.2 V typical at 800 mA
- Output capacitor
- 10 µF tantalum minimum
- Protection
- Current limit, thermal shutdown
Frequently asked questions
What input voltage do I need?
The input must be at least about 6.2 V for proper 5 V regulation at full load (5 V output plus about 1.2 V dropout). Keep the input well below the maximum rating in the datasheet, and calculate power dissipation as (Vin - 5 V) x load current to decide whether a heatsink is needed.
Can I use this part for 3.3 V?
No. This listing is the fixed 5 V version. The LM1117 family also has 3.3 V and other fixed versions, as well as an adjustable version, so select the exact variant that matches your required output voltage.
