AMS1117-1.8V 800mA LDO Voltage Regulator SMD
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Prices updated: 13 Oct 2026
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About this product
A fixed 1.8 V low-dropout linear voltage regulator rated for up to 800 mA output, supplied in the SOT-223 surface-mount package. It provides a stable 1.8 V rail for low-voltage logic, sensors and microcontroller cores. Follow the datasheet for recommended input and output capacitors.
Specifications
- Output voltage
- 1.8 V (fixed)
- Max output current
- 800 mA
- Regulator type
- Linear LDO
- Package
- SOT-223 (SMD)
Frequently asked questions
What input voltage do I need?
The input must be higher than 1.8 V by the dropout voltage, which is roughly 1.1 V to 1.2 V at full load according to the AMS1117 datasheet. A 3.3 V or 5 V input is typical.
Does it need a heatsink?
A linear regulator dissipates (Vin minus Vout) multiplied by the load current as heat. At light loads it is fine on its own, but at high current or high input voltage, add copper area on the PCB or a heatsink.
