Details

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BUY AAT1164 https://www.utsource.net/itm/p/12591066.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating Range	2.7	-	5.5	V
Output Voltage	VOUT	Fixed	-	1.8	-	V
Output Current	IOUT	Continuous	-	300	-	mA
Quiescent Current	IQ	No Load	-	40	-	μA
Dropout Voltage	VDROPOUT	IOUT = 300mA	-	260	-	mV
Shutdown Current	ISD	VEN = 0V	-	1	-	μA
Power Supply Rejection Ratio	PSRR	@ 1kHz, IOUT = 100mA	-	70	-	dB
Transient Response	ΔVOUT	Step Load from 0mA to 300mA	-	20	-	mV

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.

(For reference only)