AMS1117 PDF – Voltage Regulator – AMS

Part number : AMS1117


Package information : SOT-223, TO-252, 8L SOIC Type

Manufacturer : Advanced Monolithic Systems

Image :

AMS1117 regulator


Functions :

The AMS1117 series of adjustable and fixed voltage regulators are designed to provide 800mA output current and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V at maximum output current, decreasing at lower load currents.

On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload conditions on both the regulator and power source circuitry. The AMS1117 devices are pin compatible with other three-terminal SCSI regulators and are offered in the low profile surface mount SOT-223 package and in the TO-252 (DPAK) plastic package.

The AMS1117-ADJ and AMS1117-1.2, AMS1117-1.5, -1.8, -2.5, -2.85, -3.3 and AMS1117-5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures.



1. Low dropoutvoltage
2. Loadregulation: 0.2% typical
3. Optimized for Low Voltage
4. On-chip thermal limiting
5. StandardSOT-223 and TO-252 packages
6. Three-terminal adjustable or fixed low dropout 1.2V,1.5V,1.8V, 2.5V, 2.85V, 3.3V, 5V. Regulators

Pinout and package information

AMS1117 datasheet pinout

Thermal Considerations

The AMS1117 series have internal power and thermal limiting circuitry designed to protect the device under overload conditions. However maximum junction temperature ratings of 125°C should not be exceeded under continuous normal load conditions.


1. Active SCSI terminators
2. High efficiency linear regulators
3. Post regulators for switching supplies
4. Battery chargers
5. 12V to 5V linear regulators
6. Motherboard clock supplies


AMS1117 Datasheet PDF