AAT1164

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Instructions for Use:

1. Power Supply Connection:

   • Connect the input voltage (VIN) between 2.7V and 5.5V to the VIN pin.
   • Ensure a bypass capacitor (typically 1μF) is placed close to the VIN pin for stability.

2. Output Configuration:

   • The AAT1164 provides a fixed output voltage of 1.8V. No external components are required for setting the output voltage.

3. Load Regulation:

   • The device can supply up to 300mA continuously. Ensure the load does not exceed this limit to avoid overheating or damage.

4. Thermal Considerations:

   • For optimal performance, ensure adequate heat dissipation if operating near maximum current limits.

5. Enable Pin (VEN):

   • To activate the regulator, apply a high signal (≥1.2V) to the VEN pin.
   • To shut down the device, pull the VEN pin low (<0.4V), which will reduce the shutdown current to approximately 1μA.

6. Bypass Capacitors:

   • Place a 1μF ceramic capacitor on the output (VOUT) to maintain stability and improve transient response.

7. PCB Layout:

   • Keep the power path short and wide to minimize inductance and resistance.
   • Ensure good grounding practices by using multiple ground vias and a solid ground plane.

8. Transient Response:

   • The device has a typical transient response of 20mV for a step load change from 0mA to 300mA. This ensures stable operation under varying load conditions.

9. Power Supply Rejection Ratio (PSRR):

   • The device maintains a PSRR of 70dB at 1kHz, providing effective noise rejection from the input supply.